AMS AS3611 Datasheet

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is now
ams AG
The technical content of this austriamicrosystems datasheet is still valid.
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D ata sh eet
A S 3 6 1 0 /11
S w i tc h i n g C h ar g e r fo r L i -I o n / L i P o / L i F eP O 4 p o w e r ed d ev i ce s
The 100/500mA USB current limit can be set via a dedicated control
pin. Other limits like 900mA can be programmed in the OTP ROM.
In addition, the Charger can generate a 5.05V output supply at
VBUS for USB OTG.
DCDC USB Charger
1.25A, 3MHz DCDC Charger
OTG Boost with low IQ (700µA) up to 500mA
22V over voltage protection
Seamless 100% Mode
Reverse Polarity protection on VBUS
NTC support
Low side LED driver
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AS3610 features an I2C interface which can be used by a microcontroller to fully control all functionality of the chip. Charging current
and EOC current can be set with external resistors and adjusted via
register settings if needed.
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The AS3610/11 is a highly integrated standalone or optional I²C
controlled step down charger. All supervision and regulation
functions are realized internal and independent from the processor.
2 Key Features
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1 General Description
AS3611 is a stand-alone version of this charger IC. Charging and
EOC current is set by resistor only. Functions like OTG boost mode
or max current limit for wall adapter mode can be enabled using
dedicated pins.
No external shunt resistor required
“No Battery” operation without voltage drop
Package: MLPD14 3x3mm
3 Application
The device is ideal as 1 Cell LiIon, LiPo or LiFePO4 charger for
mobile phones and portable devices.
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Figure 1. AS3610/11 Block Diagram
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AS3610/11
Datasheet - C o n t e n t s
Contents
1 General Description
2 Key Features
............................................................................................................................................................................ 1
................................................................................................................................................................................ 1
....................................................................................................................................................................... 3
4.1 Pin Descriptions
................................................................................................................................................................................... 3
5 Absolute Maximum Ratings
6 Electrical Characteristics
...................................................................................................................................................... 4
.......................................................................................................................................................... 5
7 Typical Operating Characteristics
8 Detailed Description
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4 Pin Assignments
............................................................................................................................................. 7
................................................................................................................................................................. 9
8.1 Charge Controller
................................................................................................................................................................................. 9
8.2 Step up converter mode (OTG Boost)
8.3 2-Wire-Serial Control Interface
........................................................................................................................................................................... 15
.............................................................................................................................................................................. 19
........................................................................................................................................................... 21
10 Package Drawings and Markings
......................................................................................................................................... 22
............................................................................................................................................................. 24
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11 Ordering Information
..................................................................................................................................................... 14
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8.5 Register Description
8.6 Register Overview
............................................................................................................................................... 12
........................................................................................................................................................... 12
8.4 AS3611 pre-programmed variants
9 Application Information
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3 Application
.................................................................................................................................................................. 1
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AS3610/11
Datasheet - P i n A s s i g n m e n t s
4 Pin Assignments
4.1
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Figure 2. AS3610/11 Pin Assignments (Top View)
Pin Descriptions
Table 1. Pin Descriptions
Pin
Number
Pin Name
1
XEN
AS3610
Pin Name
XEN
2
USB500
3
NTC
4
VBAT
5
VDD_INT
6
SW
7
VBUS
8
PGND
9
STAT
10
I_TERM
11
I_SET
I_SET
VSS
VSS
NTC
Supply
Description
VBAT
XEnable pin for step down charger
VBAT
Set current limit in charger mode. 100mA / 500mA
USB current limit.
VDD_INT
VBAT
NTC input
Analog Sense input
Analog pin
VDD_INT
Connect 1µF (0402) for internal LDO supply 2.5V
SW
SW node of step down charger. Connect to 1µH
inductor (chip coil)
Power pin
VBUS
Charger input (USB voltage or charger voltage)
Power GND connection of step down charger
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PGND
STAT
Digital Open Drain Output
pin
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I_TERM
SCL
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I
USB500
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Pin Type
AS3611
Analog pin
14
VBAT
Sets trickle / EOC current
VBAT
Sets charging current (Constant current)
Analog VSS
Digital Open Drain Output
pin; Requires an external
pull-up resistor
VBAT
I²C clock line
I
VBAT
switches mode to OTG boost
Digital Open Drain Output
pin; Requires an external
pull-up resistor
VBAT
I²C data line
I
VBAT
selects the highest input current limit for wall adapter
charging
OTG_BOOST
SDA
Pulled to GND for error / status indication via LED
CHG_DET
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AS3610/11
Datasheet - A b s o l u t e M a x i m u m R a t i n g s
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of
the device at these or any other conditions beyond those indicated in Operating Conditions on page 5 is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Table 2. Absolute Maximum Ratings
Min
Max
Unit
Comments
V_HV20
High voltage pins
-2
22
V
Applicable to high voltage pins: VBUS, SW, STAT
V_MV
5V pins
-0.3
7.0
V
Applicable to 5V-pins: VBAT, XEN, SDA, SCL,
USB500, I_SET, I_TERM
V_LV
3.3V pins
-0.3
5.0
V
Applicable to 3.3V-Pins: VDD_INT, NTC
IIN
Input pin current
-100
+100
mA
Norm: JEDEC JESD78
Electrical Parameters
Electrostatic Discharge
1
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VESD
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Parameter
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Symbol
Electrostatic discharge
+/-1500
V
Norm: JEDEC JESD22-A114F
Temperature Ranges and Storage Conditions
SCSB
Operating Temperature
TJ
Junction Temperature
-40
+85
ºC
+110
ºC
Storage Temperature Range
-55
+150
ºC
Humidity non-condensing
5
85
%
Temperature (soldering)
2
TBODY
Package Body Temperature
Moisture Sensitive Level
260
ºC
3
Norm IPC/JEDEC J-STD-020
The lead finish for Pb-free leaded packages is matte tin
(100% Sn)
Represents a max. floor life time of 168h
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1. pin STAT is +/-750V only
2. The reflow peak soldering temperature (body temperature) is specified according IPC/JEDEC J-STD-020 “Moisture/Reflow Sensitivity
Classification for Nonhermetic Solid State Surface Mount Devices”
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AS3610/11
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
VBAT=+2.7V...+5.5V, TA =-40ºC...+85ºC. Typical values are at VBAT=+3.6V, TA=+25ºC, unless otherwise specified.
The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods.
Table 3. Operating Conditions
Parameter
Notes
Min
Typ
VHV20
High voltage pins
Applicable to high voltage pins: VBUS, SW.
-2
5.0
VMV
5V pins
Applicable to 5V pins: VBAT, XEN, SDA,
SCL, USB500, I_SET, I_TERM
-0.3
VLV
3.3V pins
Applicable to 3.3V-Pins: VDD_INT, NTC
-0.3
TAMB
Ambient Temperature
-40
Operating Currents
IUSB limit > 100mA
Unit
20
V
5.5
V
3.6
V
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Operating Range
Max
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Symbol
25
85
deg
10
mA
IUSB limit < 100mA
5
mA
VBAT current,
if boost active without load
VBAT=4.2V
700
µA
IVBUS_OFF
VBUS current in OFF mode
VBUS=5V, TJ < 85ºC
16
µA
IVBAT
VBAT quiescent current in OFF mode
VBAT=4.2V, TJ < 85ºC
Including leakage current to VBUS
16
µA
VBUS current,
if step down charger is active
IBOOST
Charging Mode Parameter
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IVBUS_ACT
VBUS undervoltage lockout
Step Down charger disabled below this
threshold. -150mV hysteresis
3.7
3.8
3.9
V
VBUS_OV
VBUS overvoltage off mode
Step Down charger disabled above this
threshold. -140mV hysteresis
6.3
6.5
6.7
V
VBUS_min
VBUS minimum voltage to regulate
current to VBAT
Programmable (2-bit)
Vnom 0.12
3.9
4.2
4.5
4.7
Vnom+
0.12
V
ICHARGE
Charge current accuracy of mean
output current
Current selected by resistor on ISET pin:
ICHARGE = 21450/RSET and register
const_curr<1:0>
-8%
550…
1250
+8%
mA
ITERM
Termination and trickle (precharge)
current
50…
200
+40mA or
+30%
mA
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USB input current limit resistor
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IUSB
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VBUS_UVLO
Apply ISOFT current below this VBAT
voltage
ISOFT
Soft current, if VBAT is below VSOFT
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VSOFT
Current selected by resistor on ITERM pin: -40mA or
ITERM = 1200/RTERM
-30%
100mA USB current limit
88
93
105
mA
500mA USB current limit
450
475
500
mA
900mA USB current limit
800
850
900
mA
Hysteresis -100mV
1.9
2.0
2.1
V
25
38
55
mA
-0.1
2.9
+0.1
V
+1
%
+100
mV
VTRICKLE
Apply trickle current (=ITERM ) below
this VBAT voltage
VCHARGE
End of charge voltage
20mV steps Programmable
End of charge accuracy
4.2V EOC voltage, -40..85°C
-1
Charge detect voltage difference
VBUS-VBAT
+1
VCHDET
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AS3610/11
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 3. Operating Conditions
Symbol
Parameter
Notes
VRESUME
Resume voltage
VTHRESHOLD = VCHARGE - VRESUME
RPMOS
Min
Typ
Max
Unit
120
mV
Resistance of PMOS switch
300
mΩ
RNMOS
Resistance of NMOS switch
300
mΩ
fOSC
Switching frequency
DMAX
Maximum duty cycle
Smooth transition. No skipmode.
TMIN
Minimum ON time of PMOS
Minimum ON time of PMOS. Below this
value, transition to pulseskip mode
ICOIL
Coil current limit
60
VBOOST
VBUS regulated voltage in boost
mode
IBOOST
Boost current
2.7<VBAT<4.5 (boost_lowcurr=1)
200
IHBOOST
Boost current (high current mode)
3.2<VBAT<4.5 (boost_lowcurr=0)
500
ICOIL
Coil current limit
ISU
Stepup no load current on VBAT
MHz
100
%
nsec
A
5.05
5.2
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3.3
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1.7
Boost Mode Parameter
Thermal Limitation
3.0
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2.7
VBAT=4.2V
V
mA
mA
0.75
1.5
A
700
µA
TREG
Thermal current regulation for charger
mode
110
°C
TSHDOWN
Thermal shutdown limit
140
°C
NTC Charging Temperature Range
Battery Temperature high level
(50 or 55 ºC) NTCbeta = 4200
ntc_temp=0
500 or
400
mV
VBATTEMP_OFF
Battery Temperature low level
(45 or 50 ºC) NTCbeta = 4200
ntc_temp=1
600 or
500
mV
IBATTEMP
NTC Bias Current
100kΩ NTC
-14%
15
+14%
µA
IBATTEMP
NTC Bias Current
10kΩ NTC
-10%
150
+10%
µA
-0.3
0.4
V
1.4
VBAT
V
IO characteristics
SCL/CHG_DET, SDA/OTG_BOOST,
USB500, XEN
High Level input voltage
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SCL/CHG_DET, SDA/OTG_BOOST,
USB500, XEN
Low Level input voltage
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VBATTEMP_ON
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AS3610/11
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
7 Typical Operating Characteristics
CVBAT=10µF, CVBUS=10µF, L=1µH,
Figure 3. USB Current (100mA limit)
Figure 4. USB Current (500mA limit)
0,1
0,5
0,08
0,4
0,3
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0,06
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USB current (500m A limit)
0,6
IUSB [A]
IUSB [A]
USB current (100mA limit)
0,12
0,2
0,04
VUSB=4.5V, Iusb=500mA
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VUSB=4.5V, Iusb=100mA
0,02
0,1
VUSB=5.5V, Iusb=100mA
VUSB=5.5V, Iusb=500mA
VUSB=6.5V, Iusb=500mA
VUSB=6.5V, Iusb=100mA
0
0
2,5
2,7
2,9
3,1
3,3
3,5
3,7
3, 9
4,1
4,3
2,5
2,7
2,9
3,1
VBAT [V]
3,3
3,5
3,7
3,9
4,1
4,3
4,1
4,3
VBAT [V]
Figure 5. Current into Battery (100mA limit)
Figure 6. Current into Battery (500mA limit)
Battery current (100mA IUSB limit)
Battery current (500mA IUSB limit)
0,9
0,3
0,8
0,25
0,7
0,6
IBAT [A]
IBAT [A ]
0,2
0,15
0,5
0,4
0,3
0,1
0,2
VUSB=4.5V, Iusb=100mA
0,05
VUSB=4.5V, Iusb=500mA
VUSB=5.5V, Iusb=100mA
2,5
2,7
2,9
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VUSB=6.5V, Iusb=100mA
0
3,1
3,3
3,5
3,7
3, 9
VUSB=5.5V, Iusb=500mA
0,1
VUSB=6.5V, Iusb=500mA
0
4,1
4,3
2,5
VBAT [V]
2,7
2,9
3,1
3,3
3,5
3,7
3,9
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VBAT [V]
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AS3610/11
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 7. Charging Cycle 1
Figure 8. Charging Cycle 2
Batte ry curre nt (100m A pre chg, 1200m A CC)
0,6
1,2
0,5
1
0,4
0,8
0,3
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1,4
IB AT [A]
IBAT [A ]
Battery current (54mA prechg, 550mA CC)
0,7
0,6
0,4
0,2
VUSB=4.5V, 100/1192mA
VUSB=4.5V, 54/550mA
VUSB=5.5V, 100/1192mA
0,2
VUSB=5.5V, 54/550mA
VUSB=6.5V, 54/550mA
VUSB=6.5V, 100/1192mA
0
0
2,5
2,7
2,9
3,1
3,3
3,5
3,7
3,9
4,1
4,3
2,5
2,7
2,9
3,1
3,3
3,5
3,7
3,9
4,1
4,3
VBAT [V]
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VBAT [V]
Figure 9. Efficiency @550mA
Figure 10. Efficiency @1.2A
DCDC Charger Efficiency @ Charge Current=550mA
DCDC Charger Efficiency @ Charge Current=1.2A
100
100
95
95
90
90
85
Efficiency [%]
Efficiency [% ]
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0,1
80
75
85
80
75
70
70
VUSB=4.5V, 54/550mA
VUSB=4.5V, 100/1192mA
VUSB=5.5V, 54/550mA
65
VUSB=5.5V, 100/1192mA
65
VUSB=6.5V, 54/550mA
60
VUSB=6.5V, 100/1192mA
60
3
3,2
3,4
3,6
3,8
4
4,2
4,4
3
3,2
3,4
3,6
VBAT [V]
ca
Figure 11. Boost Efficiency
4,2
4,4
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VUSB voltage re gulation
5,1
VBAT=2.7V , boost_low curr=0
5,08
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4
Figure 12. Booster Output Voltage
BOOST Efficiency
100
3,8
VBAT [V]
VBAT=3.2V , boost_low curr=0
VBAT=4.0V , boost_low curr=0
5,06
5,04
85
VUSB [A]
5,02
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Efficiency [% ]
90
80
5
4,98
75
4,96
70
4,94
VBAT=4.0V , boost_low cu rr=1
65
4,92
4,9
60
0
0,05
0,1
0,15
0,2
0,25
0,3
0,35
0,4
0
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0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
IUSB [V]
IBUS [V]
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
8.1
Charge Controller
8.1.1
General Description
Internal voltage regulator
Low current (soft) charging
Low current (trickle) charging
Constant current charging
Constant voltage charging
22V input overvoltage protection
Battery presence indication
Operation without battery
Input current limitation
Input voltage drop regulation
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Charge adapter detection
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The AS3610/11 device serves as a standalone battery charge controller supporting rechargeable Lithium Ion (Li+) batteries. Requiring only a few
external components, a full-featured battery charger with a high degree of flexibility can easily be realized. The main features of the controller
are:
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Figure 13. Detailed Block Diagram
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
8.1.2
8.1.2.1
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Figure 14. Detailed Block Diagram
Charging Cycle Description
Charge adapter detection
The charger uses an integrated detection circuit to determine if an external charge adapter has been applied to the VBUS pin. If the VBUS
voltage exceeds the battery voltage at pin VBUS by VCHDET the ChDet bit in the ChargerStatus1 register will be set. That detection de-bounce
time is approx. 300msec for rising ChDet and approx. 30msec for falling ChDet signal (debounce_timer=00b).
8.1.2.2
Low current soft charging
When the charger is detected and enabled (chg_en=1), no stop charging condition is active and the battery voltage is below VSOFT, the charging
cycle is started with soft_charging. In that mode the charger is acting as a linear charger down to VBAT. With a current of ISOFT
8.1.2.3
(Trickle) Pre-charging
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If the battery voltage exceeds VSOFT, but is below VTRICKLE, and the bit prechg_en is set, the trickle charging is started.
In that mode the charging current is defined by the external resistor on pin I_TERM or the input current limit if e.g. 100mA input current limit is
active.
Constant current charging
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8.1.2.4
ch
If the battery voltage is above VTRICKLE and below VEOC (or above VSOFT if prechg_en=0) the charging current is defined by the resistor on pin
I_SET. In addition the current can be reduced by I2C with the register setting of constcurr. (AS3610 only)
8.1.2.5
Constant voltage charging
Constant voltage charge mode is initiated, if the battery voltage has reached the VEOC threshold.
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The charge current is monitored during constant voltage charging. It will be decreasing from its initial value during constant current charging and
eventually drop below the value set by the resistor on pin I_TERM. If the measured charge current is less than or equal to ITERM, the charging
cycle is terminated and EOC is set. The termination current may be reduce by a factor of 2 by setting the eoccurr bit to 1.
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
Charger States
8.1.4
Stop charging conditions
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8.1.3
There are multiple safety features implemented that trigger a stop_charging condition:
These are the following:
- Battery temperature too high. If ntc_on=1 and voltage at pin NTC is below VBATTEMP
- Timeout timer expired (If ch_timeout>0 and charging time has been exceeded). Can be reset by unplugging the charger, setting chg_en=0
or writing charging_tmax=0
- VBUS_OV exceeded
- VBUS_UVLO reached
- Die temp>140deg (ov_temp_140 set)
Battery presence indication and operation without battery
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8.1.5
After EOC state is reached a timer for NOBAT detection is started. If there is no battery present, the voltage will drop to VNOBAT_REG. Depending
on the load on VBAT and the capacitor on VBAT this might take some milliseconds to 1 second. The charger will restart charging
(ConstantCurrent charging) after 100msec.
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The 100msec dead time is necessary to get a battery oscillation frequency of below 10Hz, if there is no battery present and NTC battery
detection is not enabled.
ch
If No_bat_det=1 and the NOBAT detection timer is below 2 seconds after reaching EOC state, and this happens 2 times in serial, the state
“operation without battery” is entered.
If the nobat_ntc_det bit is set the looping described above will be stopped and a NTC detection is started.
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A pull up current of 0.5uA is applied to NTC. If the NTC voltage is above 1.8V, the state machine stays in the no bat state. If the BATTEMP
voltage is below 1.8V, a charging cycle is restarted.
8.1.6
VBUS undervoltage regulation
If the voltage on VBUS drops below Vchg_min the current is regulated down to avoid overloading of the input source.
8.1.7
Charger overvoltage protection
This blocks checks if the charger voltage VBUS is above VBUS_OV. In that case the bit stop_charging is set and the charging is stopped until VBUS
is below VBUS_OV.
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
8.1.8
NTC supervision
This charger block also features a supply for an external NTC resistor to measure the battery temperature while charging. If the temperature is
too high (voltage on NTC pin is below VBATTEMP_ON) the charger will stop operation (stop_charging=1).
When the battery temperature drops, the voltage on NTC pin will rise above VBATTEMP_OFF and the charger will start charging again. This is
forming a temperature hysteresis of about 3 to 5°C to avoid an oscillation of the charger.
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The levels for switching off the charger (ntc_temp: 45ºC or 55ºC) as well as the type of NTC (ntc_10k: 10k or 100k) can be selected via
register settings. The battery temperature supervision via the NTC can be switched off (ntc_on = 0).
The supply for the NTC will be only on when a charger is detected and ntc_on bit is set.
8.2
Step up converter mode (OTG Boost)
Softstart of OTG booster
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8.2.1
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The step down charger can also be used in a boost mode providing an output voltage VBOOST on pin VBUS typ 5.05V. In that mode the current
direction is inverted to the charging mode providing current from the battery to the VBUS pin. To enable that mode, it’s necessary that the charger
is disabled (XEN=1 or chg_en=0) and the bit boost_en is set (and for AS3611 the pin OTG_BOOST=1). The bit boost_lowcurr selects the output
current capability between 200mA and 500mA.
There is a softstart implemented to reduced inrush current on the VBAT input. For approx. 1msec after the booster is enabled the
output current is limited below 100mA. After that startup time the full current is available.
8.2.2
Short-circuit and overvoltage protection circuit
To protect the booster, the battery capacity and the circuit connected to VBUS there are multiple protection circuits implemented:
- VBAT drops below 2.6V (typ)
- VBUS is above 5.3V (typ)
- Booster is in current limit operation (e.g. output VBUS is overloaded or shorted to GND)
If one of these conditions is valid for more that 30msec debounce time (debounce_timer=00b), the booster is stopped and the boost_error bit is
set. To restart the booster it’s necessary to set boost_en=0 and 1 again. (For AS3611 the OTG_BOOST pin has to be set to 0 and 1 again).
If the die Temp is above 140deg the booster is stopped and restarted automatically when the die temperature drops.
8.3
2-Wire-Serial Control Interface
8.3.1
Feature List
Fast-mode capability (max. SCL-frequency is 400 kHz)
7+1-bit addressing mode
60h x 8-bit data registers (word address 0x00 - 0x60)
Write formats: Single-Byte-Write, Page-Write
Read formats: Current-Address-Read, Random-Read, Sequential-Read
SDA input delay and SCL spike filtering by integrated RC-components
ni
8.3.2
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Protocol
ch
Table 4. 2-Wire Serial Symbol Definition
Symbol
Definition
RW
Note
S
Start condition after stop
R
1 bit
Repeated start
R
1 bit
Device address for write
R
1000 1100b (8Ch)
DR
Device address for read
R
1000 1101b (8Dh)
WA
Word address
R
8 bit
A
Acknowledge
W
1 bit
N
No Acknowledge
R
1 bit
Te
Sr
DW
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1.01
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
Table 4. 2-Wire Serial Symbol Definition
Definition
RW
Note
reg_data
Register data/write
R
8 bit
data (n)
Register data/read
W
8 bit
P
Stop condition
R
1 bit
WA++
Increment word address internally
R
during acknowledge
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Symbol
Figure 15. Byte Write
S
DW
A
WA
A
reg_data
A P
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write register
WA++
S
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Figure 16. Page Write
DW
A
WA
A
reg_data 1
A
reg_data 2
write register
WA++
A
...
reg_data n
write register
WA++
A
P
write register
WA++
Byte Write and Page Write formats are used to write data to the slave.
The transmission begins with the START condition, which is generated by the master when the bus is in IDLE state (the bus is free). The devicewrite address is followed by the word address. After the word address any number of data bytes can be sent to the slave. The word address is
incremented internally, in order to write subsequent data bytes on subsequent address locations.
For reading data from the slave device, the master has to change the transfer direction. This can be done either with a repeated START condition
followed by the device-read address, or simply with a new transmission START followed by the device-read address, when the bus is in IDLE
state. The device-read address is always followed by the 1st register byte transmitted from the slave. In Read Mode any number of subsequent
register bytes can be read from the slave. The word address is incremented internally.
Figure 17. Random Read
DW
A
WA
A Sr
DR
A
data
N P
read register
WA++
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S
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Random Read and Sequential Read are combined formats. The repeated START condition is used to change the direction after the data transfer
from the master.
ch
The word address transfer is initiated with a START condition issued by the master while the bus is idle. The START condition is followed by the
device-write address and the word address.
Te
In order to change the data direction a repeated START condition is issued on the 1st SCL pulse after the acknowledge bit of the word address
transfer. After the reception of the device-read address, the slave becomes the transmitter. In this state the slave transmits register data located
by the previous received word address vector. The master responds to the data byte with a not-acknowledge, and issues a STOP condition on
the bus.
Figure 18. Sequential Read
S
DW
A
WA
A Sr
DR
A
read register
WA++
www.austriamicrosystems.com/Battery-Chargers/AS3610
data
A
reg_data 2
read register
WA++
1.01
A
...
reg_data n
N P
read register
WA++
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
Sequential Read is the extended form of Random Read, as more than one register-data bytes are transferred subsequently. In difference to the
Random Read, for a sequential read the transferred register-data bytes are responded by an acknowledge from the master. The number of data
bytes transferred in one sequence is unlimited (consider the behavior of the word-address counter). To terminate the transmission the master
has to send a not-acknowledge following the last data byte and generate the STOP condition subsequently.
S
DR
A
data
read register
WA++
A
reg_data 2
read register
WA++
A
...
reg_data n
read register
WA++
N P
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Figure 19. Current Address Read
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To keep the access time as small as possible, this format allows a read access without the word address transfer in advance to the data transfer.
The bus is idle and the master issues a START condition followed by the Device-Read address. Analogous to Random Read, a single byte
transfer is terminated with a not-acknowledge after the 1st register byte. Analogous to Sequential Read an unlimited number of data bytes can
be transferred, where the data bytes has to be responded with an acknowledge from the master. For termination of the transmission the master
sends a not-acknowledge following the last data byte and a subsequent STOP condition.
8.4
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The AS3610 is compatible to the NXP two wire specification http://www.nxp.com/acrobat_download2/literature/9398/39340011.pdf Version 2.1
January 2000 for standard and fast mode (no high speed mode).
AS3611 pre-programmed variants
AS3611 is intended to work stand-alone with out an micro-controller. For this use case some of the basic configurations have to be preprogrammed into the device. Two basic configurations are shown in the tables below. Adaptations to these configurations are possible upon
request.
Table 5. AS3611-A stand alone version for Li-Ion/LiPo,100kOhm NTC
Reg. Addr.
Value
0
7Fh
standalone mode=1, Boost_en=1, prechg_en=1, nobat_det=0
1
63h
Veoc=4.2V, Vchg_min=4.2
2
00h
3
05h
100kOhm NTC, low_temp range (45/50°C)
8Ah
ch_timeout=5h, stat_mode: charging=on; EOC=1Hz blinking, stop_charging
or boost_error=5Hz
4
Description
Reg. Name
Charger Control
Charger Voltage Control
Charger Current Control
NTC Supervision
Charger supervision
Table 6. AS3611-B stand alone version for Li-Ion/LiPo,10kOhm NTC
0
7Fh
1
63h
2
00h
3
Reg. Name
standalone mode=1, Boost_en=1, prechg_en=1, nobat_det=0
Veoc=4.2V, Vchg_min=4.2
Charger Control
Charger Voltage Control
Charger Current Control
07h
10kOhm NTC, low_temp range (45/50°C)
8Ah
ch_timeout=5h, stat_mode: charging=on; EOC=1Hz blinking, stop_charging
or boost_error=5Hz
ch
4
Description
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Value
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Reg. Addr.
NTC Supervision
Charger supervision
Table 7. AS3611-C stand alone version for FePO4, 10kOhm NTC
Value
0
7Fh
standalone mode=1, Boost_en=1, prechg_en=1, nobat_det=0
1
47h
Veoc=3.64V, Vchg_min=4.2
Charger Voltage Control
2
01h
eoccurr=1
Charger Current Control
3
05h
100kOhm NTC, low_temp range (45/50°C)
A6h
ch_timeout=3h, stat_mode: ch_det=on; EOC=1Hz blinking, stop_charging
or boost_error=5Hz
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Reg. Addr.
4
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Description
Reg. Name
Charger Control
NTC Supervision
1.01
Charger supervision
14 - 25
AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
8.5
Register Description
Charger Control Register (Address 0).
Charger Control
Addr: 0
This register controls the mode of the charger and the charger state machine.
Bit Name
0
Chg_en
Default
Access
Bit Description
ON/OFF control of USB charger input
1b/ROM
R/W
0
1
Charger disabled
Charger enabled, if XEN=0
1
Boost_en
0b/ROM
R/W
0
1
Step up disabled
Step up enabled
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ON/OFF control of Step up for USB OTG
Normal operation (usb current=0..6):
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Bit
AS3611 standalone charger operation only w/o I²C (usb current=7)
Step up disabled
Step up enabled, if OTG_BOOST=1,
Step up disabled, if OTG_BOOST=0
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0
1
USB input current limit, AS3610 I²C version only
5
prechg_en
000b/ROM
1b/ROM
disable_toff
1b/ROM
R/W
R/W
R/W
ch
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6
usb_current
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4:2
No_bat_det
1b/ROM
R/W
100mA, if pin USB500=0
500mA, if pin USB500=1
001b
010b
011b
100b
101b
110b
100mA
500mA limit
900mA limit
unlimited
NA
unlimited
111b
AS3611 stand alone charger only w/o I²C
CHG_DET=1 and USB500=0 → 100mA limit
CHG_DET=1 and USB500=1 → 500mA limit
CHG_DET=0 and USB500=1 → unlimited current
0
Pre-charge (trickle charge) disabled. Charger starts with
constant current, if VBAT>2.0V (current set by resistor I_SET)
1
Pre-charge (trickle charge) enabled. Charger starts with
trickle current, if 2.9V>VBAT>2.0V (Current set by resistor
I_term)
0
Off time of step down charger enabled. If 100% pmos on
mode is needed, off pulses are skipped
1
Off time of step down charger disabled. Smooth transition
to 100% pmos on if needed (VBUS-VBAT is small)
0
Nobat detection disabled.
1
Nobat detection enabled. If No Battery is detected a small
current through NTC (approx. 0.5µA), checks if a battery
is connected again. A NTC is necessary for that setting.
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000b
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
Charger Voltage Control Register (Address 1).
Charger Voltage Control
Addr: 1
Bit
This register controls the charger voltages.
Bit Name
Default
Access
Bit Description
End of charge voltage on VBAT
Veoc
5:0
R/W
0
...
35
...
47
3.5V
...
4.2V
...
4.44V
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ROM
Vchg_min
00b/ROM
0
1
2
3
R/W
VBAT < 3.9V
VBAT < 4.2V
VBAT < 4.5V
VBAT < 4.7V
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Minimum charger (VBUS) voltage. Current is regulated down, if VBUS
voltage drops below this level:
Charger Current Control Register (Address 2).
Charger Current Control
Addr: 2
Bit
This register controls the charger currents.
Bit Name
eoccurr
0
Default
0b/
ROM
Access
R/W
Bit Description
Current ratio selection between trickle and EOC current
(defined by resistor RTERM)
0
1
EOC current = ITERM, Trickle current = ITERM
EOC current = ITERM / 2, Trickle current = ITERM
ConstantCurrent setting
2:1
constcurr
00b/ROM
0
1
2
3
R/W
Constant Current = ICHARGE
Constant Current = 0.81*ICHARGE
Constant Current = 0.60*ICHARGE
Constant Current = 0.40*ICHARGE
Current selection for boost mode
boost_lowcurr
0b/ROM
R/W
4
NA
NA
NA
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en_pon
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5
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3
deb_timer
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7:6
0b/ROM
0
1
500mA maximum current
200mA maximum current
NA
Enables 100% on mode of PMOS
R/W
0
100% mode disabled (smooth 100% mode, if
disable_toff=1)
100% mode enabled.
1
Select debounce timer
00b/ROM
www.austriamicrosystems.com/Battery-Chargers/AS3610
R/W
0
1
2
3
30msec debounce timer for comparator output
3msec debounce timer
NA
NA
1.01
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
NTC Supervision Register (Address 03).
NTC Supervision
Addr: 03
These bits define the battery temperature supervision.
Bit
Bit Name
Default
Access
0
ntc_on
1b/ROM
R/W
1
ntc_10k
1b/ROM
R/W
2
ntc_temp
Bit Description
ON/OFF control of battery NTC supervision
Disabled
Enabled
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0
1
Select NTC resistor type
0
1
100kΩ
10kΩ
1b/ROM
R/W
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Select NTC temperature shutdown
0
1
high temperature range (50 or 55 ºC)
low temperature range (45 or 50 ºC)
Charger Supervision
Addr: 04
Bit
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Charger Supervision Register (Address 04).
These bits define charging timer settings.
Bit Name
Default
Access
Bit Description
Charging timeout timer
ch_timeout
4
charging_tmax
1010b/ROM
R/W
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3:0
stat_mode
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7:5
0b/ROM
010b/ROM
www.austriamicrosystems.com/Battery-Chargers/AS3610
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Charging timer disabled
0.5 hour
1 hour
1.5 hour
2 hour
2.5 hour
3 hour
3.5 hour
4 hour
4.5 hour
5 hour
5.5 hour
6 hour
6.5 hour
7 hour
7.5 hour
0
Read: no timeout reached
Write: reset charger timeout counter
tCHARGING,MAX timeout reached and charging stopped
R/W
1
Function of Status pin:
R/W
0
1
2
3
4
5
1.01
always off
ch_det=ON
ch_det=ON, stop_charging or boost_error=5Hz blinking
Charging=ON, stop_charging or boost_error=5Hz blinking
Charging=ON, EOC=1Hz blinking, stop_charging or
boost_error=5Hz blinking
ch_det =ON, EOC=1Hz blinking, stop_charging or
boost_error=5Hz blinking
17 - 25
AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
Charger Status1 Register (Address 05).
Charger Status1
Addr: 05
These bits show the status of the charger.
Bit Name
Default
Access
Bit Description
0
ChDet
NA
R
Bit is set when charge adapter has been detected on pin VBUS
1
CCM
NA
R
Bit is set when charger is in Constant current mode
2
Resume
NA
R
Bit is set when battery voltage has dropped below resume level
3
Trickle
NA
R
Bit is set when charger is in trickle charge mode
4
CVM
NA
R
Bit is set when charger is in top-off charge mode (constant voltage
mode)
5
EOC
NA
R
Bit is set when charging has been terminated. Bit is cleared
automatically when chg_en is cleared or charging is resumed.
6
Battemp_hi
NA
R
Bit is set, if temperature is greater than 50 or 55°C. Bit is evaluated if
charger is detected.
7
NoBat
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Bit
NA
R
Bit is set when battery detection circuit indicates that no battery is
connected to the system. This is done by measuring the NTC value.
ntc_on has to be 1.
Charger Status2 Register (Address 06).
Charger Status2
Addr: 06
These bits show the status of the charger.
Bit Name
0
LowBat
1
OVBat
2
LowBus
3
OVBus
4
UVLBus
5
Boost_act
6
Boost_err
Access
Bit Description
NA
R
Set, if VBAT<2V
NA
R
Set, if VBAT> 1.17*VCHARGE
NA
R
Set, if VBUS<3.8V
NA
R
Set, if VBUS>6.5V
NA
R
Set, if VBUS<3.3V
NA
R
Set, if boost mode active
NA
R
Set, if boost error active. (Overcurrent of booster for more than
debounce time, VBAT<2.5V, VBUS>6.5V or current limit is active
R
Set if charger is stopped because of the following reason:
- Timeout timer expired
- NTC temperature error (Hightemp)
- OVBus set
- OVBat set
- UVLBus set
- Die temp>140deg (ov_temp_140 set)
ni
Stop charging
NA
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ch
7
Default
ca
Bit
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1.01
18 - 25
AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
8.6
Register Overview
Table 8. Register table
Register
dec
hex
Default
b6
ChargerControl1
0
0h
E1h
Charger Voltage
Control
1
1h
63h
Vchg_min
Charger Current
Control
2
2h
10h
deb_timer
NTC supervision
3
3h
01h
Charger
supervision
4
4h
4Ah
ChargerStatus1
5
5h
NA
ChargerStatus2
6
6h
NA
ASIC_ID1
62
3Eh
1
1
ASIC_ID2
63
3Fh
0
1
b5
b4
No_bat_d disable_to
prechg_en
ff
et
b3
b2
usb_current<2:0>
b0
Boost_en
Chg_en
Veoc
boost_low
curr
en_pon
constcurr
ntc_temp
charging_t
max
Battemp_
hi
EOC
eoccurr
ntc_10k
ntc_on
ch_timeout
lv
stat_mode
NoBat
b1
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b7
CVM
Trickle
Resume
CCM
ChDet
UVLBus
OVBus
LowBus
OVBat
LowBat
0
0
1
0
1
1
0
1
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bat_prech
Boost_err Boost_act
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revision
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AS3610/11
Datasheet - D e t a i l e d D e s c r i p t i o n
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Figure 20. AS3610/11 State Diagram
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1.01
20 - 25
AS3610/11
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
Table 9. External Components
Parameter
Note
Min
Typ
Max
Unit
CVBUS
Input capacitor
Ceramic X5R or X7R, 16 or 25V
-20%
4.7
+120%
µF
CVBAT
Output capacitor
Ceramic X5R or X7R, 6.3V
-20%
10
+120%
µF
CVDD_INT
Output capacitor
Ceramic X5R or X7R
-20%
1
+100%
µF
Inductor (chip coil)
LQM2HPN1R0MJ0 (Murata), Isat=1.5A,
ESR=0.85mOhm
MLP2520S1R0M (TDK), Isat=1.5A,
ESR=0.85mOhm
1
RSET
Resistor for CC current
setting
550mA
650mA
750mA
850mA
950mA
1050mA
1150mA
1250mA
39,0
33,0
28,6
25,2
22,6
20,4
18,7
17,2
RTERM
Resistor for trickle / EOC
current setting
50mA
100mA
150mA
200mA
24
12
8
6
kΩ
RNTC
NTC Thermistor
@25°C
10 / 100
kΩ
µH
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Symbol
kΩ
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Figure 21. AS3611 USB detection
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1.01
21 - 25
AS3610/11
Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
10 Package Drawings and Markings
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Figure 22. MLPD14 3x3mm Package Drawings and Dimensions
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1.01
22 - 25
AS3610/11
Datasheet - R e v i s i o n H i s t o r y
Revision History
Date
Owner
Description
0.6
11.5.2011
pkm
Initial draft
0.7
1.9.2011
pkm
fixed typos, extended detailed description
0.9
16.9.2011
pkm
fixed typos, changed ESD level for STAT pin, removed 0.5% EOC voltage
limits
1.0
20.09.2011
cwo
update values for pre-programmed variants, final release
1.01
28.12.2011
cwo
Typos correction
1.1
15.3.2012
pkm
added C-Version for FePO4 batteries
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Note: Typos may not be explicitly mentioned under revision history.
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1.01
23 - 25
AS3610/11
Datasheet - O r d e r i n g I n f o r m a t i o n
11 Ordering Information
The devices are available as the standard products shown in Table 10.
Table 10. Ordering Information
Description
Delivery Form
Package
AS3610-BDFP
AS10
Switching Charger for Li-Ion/LiPo/LiFePO4 powered
devices (I2C control)
Tape & Reel in
Dry Pack
MLPD14 3x3mm
AS3611-BDFP-A
AS1A
Switching Charger for Li-Ion/LiPo powered devices
(stand alone)
Tape & Reel in
Dry Pack
MLPD14 3x3mm
AS3611-BDFP-B
AS1B
Switching Charger for Li-Ion/LiPo powered devices
(stand alone)
Tape & Reel in
Dry Pack
MLPD14 3x3mm
AS3611-BDFP-C
AS1C
Switching Charger for LiFePO4 powered devices (stand
alone)
Tape & Reel in
Dry Pack
MLPD14 3x3mm
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Note: All products are RoHS compliant and austriamicrosystems green.
Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect
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Ordering Code
Technical Support is available at http://www.austriamicrosystems.com/Technical-Support
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For further information and requests, please contact us mailto: [email protected]
or find your local distributor at http://www.austriamicrosystems.com/distributor
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1.01
24 - 25
AS3610/11
Datasheet
Copyrights
Copyright © 1997-2011, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®.
All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of
the copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
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Disclaimer
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Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale.
austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding
the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at
any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for
current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range,
unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are
specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100
parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location.
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The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not
be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use,
interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing,
performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of
austriamicrosystems AG rendering of technical or other services.
Contact Information
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Headquarters
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austriamicrosystems AG
Tobelbaderstrasse 30
A-8141 Unterpremstaetten, Austria
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Tel: +43 (0) 3136 500 0
Fax: +43 (0) 3136 525 01
For Sales Offices, Distributors and Representatives, please visit:
http://www.austriamicrosystems.com/contact
www.austriamicrosystems.com/Battery-Chargers/AS3610
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