BQ2000

BQ2000
bq2000
Programmable Multi-Chemistry
Fast-Charge Management IC
Features
General Description
➤
S a fe m ana g e m e nt o f f as t
charge for NiCd, NiMH, or LiIon battery packs
➤
High-frequency switching controller for efficient and simple
charger design
➤
Pre-charge qualification for
detecting shorted, damaged, or
overheated cells
The bq2000 is a programmable,
monolithic IC for fast-charge management of nickel cadmium (NiCd),
nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries in single- or
multi-chemistry applications. The
bq2000 detects the battery chemistry
and proceeds with the optimal charging and termination algorithms. This
process eliminates undesirable undercharged or overcharged conditions
and allows accurate and safe termination of fast charge.
➤
Fast-charge termination by
peak voltage (PVD), minimum
current (Li-Ion), maximum
temperature, and maximum
charge time
➤
Selectable top-off mode for
achieving maximum capacity in
NiMH batteries
➤
Programmable trickle-charge
mode for reviving deeply discharged batteries and for postcharge maintenance
➤
Built-in battery removal and
insertion detection
➤
Sleep mode for low power
consumption
Depending on the chemistry, the
bq2000 provides a number of charge
termination criteria:
n
Peak voltage, PVD (for NiCd and
NiMH)
n
Minimum charging current (f or
Li-Ion)
n
Maximum temperature
n
Maximum charge time
For safety, the bq2000 inhibits fast
charge until the battery voltage and
temperature are within user-defined
limits. If the battery voltage is
below the low-voltage threshold, the
b q 2 0 0 0 u s es t r ic k le- c h a r g e t o
condition the battery. For NiMH
batteries, the bq2000 provides an
optional top-off charge to maximize
the battery capacity.
The integrated high-frequency comparator allows the bq2000 to be the
basis for a complete, high-efficiency
power-conversion circuit for both
nickel-based and lithium-based
chemistries.
Pin Names
Pin Connections
SNS
1
8
MOD
VSS
2
7
VCC
LED
3
6
RC
BAT
4
5
TS
SNS
Current-sense input
VSS
System ground
LED
Charge-status
output
BAT
Battery-voltage
input
8-Pin DIP or Narrow SOIC
or TSSOP
PN-2000.eps
SLUS138C–JANUARY 2008 G
1
TS
Temperature-sense
input
RC
Timer-program input
VCC
Supply-voltage input
MOD
Modulation-control
output
bq2000
RC
Pin Descriptions
SNS
RC input used to program the maximum
charge-time, hold-off period, and trickle
rate during the charge cycle, and to disable
or enable top-off charge
Current-sense input
Enables the bq2000 to sense the battery current via the voltage developed on this pin by
an external sense-resistor connected in series with the battery pack
VSS
System Ground
LED
Charge-status output
Supply-voltage input
MOD
Modulation-control output
Functional Description
Battery-voltage input
The bq2000 is a versatile, multi-chemistry batterycharge control device. See Figure 1 for a functional block
diagram and Figure 2 for a state diagram.
Battery-voltage sense input. A simple resistive
divider, across the battery terminals, generates
this input.
TS
VCC
Push-pull output that controls the charging
current to the battery. MOD switches high
to enable charging current to flow and low to
inhibit charging- current flow.
Open-drain output that indicates the charging status by turning on, turning off, or
flashing an external LED
BAT
Timer-program input
Temperature-sense input
Input for an external battery-temperature
monitoring circuit. An external resistive divider network with a negative temperature-coefficient thermistor sets the lower
and upper temperature thresholds.
TS
Voltage
Reference
BAT
OSC
Voltage
Comparator
ADC
PVD
ALU
Clock
Phase
Generator
Timer
Charge
Control
LED
Voltage
Comparator
MOD
RC
Internal
OSC
SNS
VCC
VSS
bq2000BD.eps
Figure 1. Functional Block Diagram
2
bq2000
Figure 2. State Diagram
3
bq2000
Battery Chemistry
Initiation and Charge Qualification
The bq2000 detects the battery chemistry by monitoring
the battery-voltage profile during the initial stage of the
fast charge. If the voltage on BAT input rises to the internal VMCV reference, the IC assumes a Li-Ion battery.
Otherwise the bq2000 assumes NiCd/NiMH chemistry.
The bq2000 initiates a charge cycle when it detects
n
Application of power to VCC
n
Battery replacement
n
Exit from sleep mode
n
Capacity depletion (Li-Ion only)
As shown in Figure 6, a resistor voltage-divider between
the battery pack’s positive terminal and VSS scales the
b a t t er y v olt a g e m ea s u r ed a t p in B AT. I n a
mixed-chemistry design, a common voltage-divider is
used as long as the maximum charge voltage of the
nickel-based pack is below that of the Li-Ion pack. Otherwise, different scaling is required.
Immediately following initiation, the IC enters a
charge-qualification mode. The bq2000 charge qualification is based on battery voltage and temperature. If
voltage on pin BAT is less than the internal threshold,
VLBAT , the bq2000 enters the charge-pending state. This
condition indicates the possiblility of a defective or
shorted battery pack. In an attempt to revive a fully
depleted pack, the bq2000 enables the MOD pin to
trickle-charge at a rate of once every 1.0s. As explained
in the section “Top-Off and Pulse-Trickle Charge,” the
trickle pulse-width is user-selectable and is set by the
value of the resistance connected to pin RC.
Once the chemistry is determined, the bq2000 completes
the fast charge with the appropriate charge algorithm
(Table 1). The user can customize the algorithm by
programming the device using an external resistor and
a capacitor connected to the RC pin, as discussed in
later sections.
NiCd and NiMH Batteries
During this period, the LED pin blinks at a 1Hz rate,
indicating the pending status of the charger.
Following qualification, the bq2000 fast-charges NiCd or
NiMH batteries using a current-limited algorithm. During the fast-charge period, it monitors charge time, temperature, and voltage for adherence to the termination
criteria. This monitoring is further explained in later
sections. Following fast charge, the battery is topped off,
if top-off is selected. The charging cycle ends with a
trickle maintenance-charge that continues as long as
the voltage on pin BAT remains below VMCV.
Similarly, the bq2000 suspends fast charge if the battery
temperature is outside the VLTF to VHTF range. (See Table
4.) For safety reasons, however, it disables the pulse
trickle, in the case of a battery over-temperature condition
(i.e., VTS < VHTF). Fast charge begins when the battery
temperature and voltage are valid.
Current
IMAX
Qualification
VMCV
Voltage
Fast
Charge
Phase 1
VLBAT
Phase 2
Voltage
Trickle
Current
IMIN
Time
GR2000CA.eps
Figure 3. Lithium-Ion Charge Algorithm
4
bq2000
Table 1. Charge Algorithm
Battery Chemistry
NiCd or NiMH
Li-Ion
Charge Algorithm
1. Charge qualification
2. Trickle charge, if required
3. Fast charge (constant current)
4. Charge termination (peak voltage, maximum charge time)
5. Top-off (optional)
6. Trickle charge
1. Charge qualification
2. Trickle charge, if required
3. Two-step fast charge (constant current followed by constant voltage)
4. Charge termination (minimum current, maximum charge time)
charge. This feature provides the additional charge time
required for Li-Ion cells.
Lithium-Ion Batteries
The bq2000 uses a two-phase fast-charge algorithm for
Li-Ion batteries (Figure 3). In phase one, the bq2000
regulates constant current until VBAT rises to VMCV. The
bq2000 then moves to phase two, regulates the battery
with constant voltage of VMCV, and terminates when the
charging current falls below the IMIN threshold. A new
charge cycle is started if the cell voltage falls below the
VRCH threshold.
Maximum Temperature (NiCd, NiMH, Li-Ion)
A negative-coefficient thermistor, referenced to VSS and
placed in thermal contact with the battery, may be used
as a temperature-sensing device. Figure 5 shows a typical temperature-sensing circuit.
During fast charge, the bq2000 compares the battery
temperature to an internal high-temperature cutoff
threshold, VTCO. As shown in Table 4, high-temperature
termination occurs when voltage at pin TS is less than
this threshold.
During the current-regulation phase, the bq2000
monitors charge time, battery temperature, and battery
voltage for adherence to the termination criteria. During
the final constant-voltage stage, in addition to the
charge time and temperature, it monitors the charge
current as a termination criterion. There is no
post-charge maintenance mode for Li-Ion batteries.
Peak Voltage (NiCd, NiMH)
The bq2000 uses a peak-voltage detection (PVD) scheme
to terminate fast charge for NiCd and NiMH batteries.
The bq2000 continuously samples the voltage on the
BAT pin, representing the battery voltage, and triggers
the peak detection feature if this value falls below the
maximum sampled value by as much as 3.8mV (PVD).
As shown in Figure 6, a resistor voltage-divider between
the battery pack’s positive terminal and VSS scales the
battery voltage measured at pin BAT.
Charge Termination
Maximum Charge Time (NiCD, NiMH, and
Li-Ion)
The bq2000 sets the maximum charge-time through pin
RC. With the proper selection of external resistor and
capacitor, various time-out values may be achieved. Figure 4 shows a typical connection.
For Li-Ion battery packs, the resistor values RB1 and
RB2 are calculated by the following equation:
The following equation shows the relationship between
the RMTO and CMTO values and the maximum charge
time (MTO) for the bq2000:
VCELL 
RB1 
−1
=  N∗
VMCV 
RB2 
where N is the number of cells in series and VCELL is the
manufacturer-specified charging voltage. The end-toend input impedance of this resistive divider network
should be at least 200kΩ and no more than 1MΩ.
MTO = RMTO ∗ CMTO ∗ 35,988
MTO is measured in minutes, RMTO in ohms, and CMTO
in farads. (Note: RMTO and CMTO values also determine
other features of the device. See Tables 2 and 3 for details.)
A NiCd or NiMH battery pack consisting of N seriescells may benefit by the selection of the RB1 value to be
N-1 times larger than the RB2 value.
For Li-Ion cells, the bq2000 resets the MTO when the
battery reaches the constant-voltage phase of the
In a mixed-chemistry design, a common voltage-divider
is used as long as the maximum charge voltage of the
5
bq2000
2
VCC
VSS
7
bq2000
CMTO
RC
6
RMTO
F2000 RCI.eps
Figure 4. Typical Connection for the RC Input
VCC
2
VSS
7
VCC
RT1
bq2000
5
TS
RT2
N Battery
T Pack
C
F2000TMC.eps
Figure 5. Temperature Monitoring Configuration
2
BAT+
VSS
RB1
bq2000
4
BAT
RB2
F2000BVD.eps
Figure 6. Battery Voltage Divider
6
bq2000
nickel-based pack is below that of the Li-Ion pack. Otherwise, different scaling is required.
Once enabled, the top-off is performed over a period
equal to the maximum charge time at a rate of 116 that
of fast charge.
Minimum Current (Li-Ion Only)
Following top-off, the bq2000 trickle-charges the battery
by enabling the MOD to charge at a rate of once every
1.0 second. The trickle pulse-width is user-selectable
and is set by the value of the resistor RMTO, connected to
pin RC. Figure 7 shows the relationship between the
trickle pulse-width and the value of RMTO. The typical
tolerance of the pulsewidth below 150kΩ is ±10%.
The bq2000 monitors the charging current during the
voltage-regulation phase of Li-Ion batteries. Fast charge
is terminated when the current is tapered off to 14% of
the maximum charging current.
Initial Hold-Off Period
The values of the external resistor and capacitor
connected to pin RC set the initial hold-off period.
During this period, the bq2000 avoids early termination
due to an initial rise in the battery voltage by disabling
the peak voltage-detection feature. This period is fixed
at the programmed value of the maximum charge time
divided by 32.
During top-off and trickle-charge, the bq2000 monitors
battery voltage and temperature. These charging functions are suspended if the battery voltage rises above
the maximum cell voltage (VMCV) or if the temperature
exceeds the high-temperature fault threshold (VHTF).
Charge Current Control
maximum time - out
hold-off period =
32
The bq2000 controls the charge current through the
MOD output pin. The current-control circuit supports a
switching-current regulator with frequencies up to
500kHz. The bq2000 monitors charge current at the
SNS input by the voltage drop across a sense-resistor,
RSNS, in series with the battery pack. See Figure 9 for a
typical current-sensing circuit. RSNS is sized to provide
the desired fast-charge current (IMAX):
Top-Off and Pulse-Trickle Charge
An optional top-off charge is available for NiCd or NiMH
batteries. Top-off may be desirable on batteries that
have a tendency to terminate charge before reaching full
capacity. To enable this option, the capacitance value of
CMTO connected to pin RC (Figure 4) should be greater
than 0.13µF, and the value of the resistor connected to
this pin should be less than 250kΩ. To disable top-off, the
capacitance value should be less than 0.07µF. The tolerance of the capacitor needs to be taken into account in
component selection.
IMAX =
0.05
RSNS
If the voltage at the SNS pin is greater than VSNSLO or
less than VSNSHI, the bq2000 switches the MOD output
high to pass charge current to the battery. When the
200
180
160
140
120
Shows Tolerance
Pulsewidth—ms
100
80
60
40
20
4
3
2
1
2
4
6
8
10
50
100
150
200
250
RMTO—kΩ
2000PNvB3.eps
Figure 7. Relationship Between Trickle Pulse-Width and Value of RMTO
7
bq2000
Q1
FMMT718
D4
DC+
S1A
D3
MMSD914LT
C6
47UF
D5
MMSD914LT
C9
R10
1K
R12
120 OHMS
Q3
MMBT3904LT1
C3
10UF
R2
2K
BAT+
D2
ZHCS1000
1000PF
VCC
D6
BZT52-C5V1
L1
47UH
Q2
MMBT3904LT1
C7
4.7PF
C4
0.0022UF
R1
D1
RED
1
2
3
4
C2
0.1
R11
220 OHMS
U1
SNS
VSS
LED
BAT
R6
210K
C5
10UF
R4
12.4K
C8
0.33UF
100K
8
7
6
5
MOD
VCC
RC
TS
THERM
bq2000
C1
0.1
R8
6.81K
R9
R5
20K
221K
CHEMISTRY
BAT R7
200K
R13
1.1K
NOTES:
R3
0.05 OHM
1. For Li-Ion, the CHEMISTRY is left floating.
For NiCd/NiMH, the CHEMISTRY is tied to BAT-
Pn1031a01.eos
2. DC input voltage: 9–16V
3. Charge current: 1A
4. L1: 3L Global P/N PKSMD-1005-470K-1A
Figure 8. Single-Cell Li-Ion, Three-Cell NiCd/NiMH 1A Charger
8
bq2000
Table 2. Summary of NiCd or NiMH Charging Characteristics
Parameter
Value*
Maximum cell voltage (VMCV)
2V
Minimum pre-charge qualification voltage (VLBAT)
950mV
High-temperature cutoff voltage (VTCO)
0.225 ∗ VCC
High-temperature fault voltage (VHTF)
0.25 ∗ VCC
Low-temperature fault voltage (VLTF)
0.5 ∗ VCC
bq2000 fast-charge maximum time out (MTO)
RMTO ∗ CMTO ∗ 35,988
Fast-charge charging current (IMAX)
0.05/RSNS
Hold-off period
MTO/32
Top-off charging current (optional)
IMAX/16
Top-off period (optional)
MTO
Trickle-charge frequency
1Hz
Trickle-charge pulse-width
See Figure 7
*Please refer to DC Thresholds Specification for details.
SNS voltage is less than VSNSLO or greater than VSNSHI,
the bq2000 switches the MOD output low to shut off
charging current to the battery. Figure 8 shows a typical
multi-chemistry charge circuit.
ative-temperature-coefficient thermistor. The bq2000
compares this voltage against its internal threshold
voltages to determine if charging is safe. These
thresholds are the following:
n
Temperature Monitoring
The bq2000 measures the temperature by the voltage at
the TS pin. This voltage is typically generated by a neg-
High-temperature cutoff voltage: VTCO = 0.225 ∗ VCC
This voltage corresponds to the maximum
temperature (TCO) at which fast charging is allowed.
The bq2000 terminates fast charge if the voltage on
pin TS falls below VTCO.
Table 3. Summary of Li-Ion Charging Characteristics
Parameter
Value*
Maximum cell voltage (VMCV)
2V
Minimum pre-charge qualification voltage (VLBAT)
950mV
High-temperature cutoff voltage (VTCO)
0.225 ∗ VCC
High-temperature fault voltage (VHTF)
0.25 ∗ VCC
Low-temperature fault voltage (VLTF)
0.5 ∗ VCC
bq2000 fast-charge maximum time-out (MTO)
2 ∗ RMTO ∗ CMTO ∗ 35,988
Fast-charge charging current (IMAX)
0.05/RSNS
Hold-off period
MTO/32
Minimum current (for fast-charge termination)
IMAX/7
Trickle-charge frequency (before fast charge only)
1Hz
Trickle-charge pulse-width (before fast charge only)
See Figure 7
*Please refer to DC Thresholds Specification for details.
9
bq2000
Table 4. Temperature-Monitoring Conditions
Temperature
Condition
Action
VTS > VLTF
Cold battery—checked at all times
Suspends fast charge or top-off and timer
Allows trickle charge—LED flashes at 1Hz rate
during pre-charge qualification and fast charge
VHTF < VTS < VLTF
Optimal operating range
Allows charging
VTS < VHTF
Suspends fast-charge initiation, does not allow
Hot battery—checked during charge qualitrickle charge—LED flashes at 1Hz rate during
fication and top-off and trickle-charge
pre-charge qualification and fast charge
VTS < VTCO
Battery exceeding maximum allowable
temperature—checked at all times
n
n
Terminates fast charge or top-off
Sleep Mode
High-temperature fault voltage: VHTF = 0.25 ∗ VCC This
voltage corresponds to the temperature (HTF) at which
fast charging is allowed to begin.
The bq2000 features a sleep mode for low power consumption. This mode is enabled when the voltage at pin
BAT is above the low-power-mode threshold, VSLP. During sleep mode, the bq2000 shuts down all internal circuits, drives the LED output to high-impedance state,
and drives pin MOD to low. Restoring BAT below the
VMCV threshold initiates the IC and starts a fast-charge
cycle.
Low-temperature fault voltage: VLTF = 0.5 ∗ VCC
This voltage corresponds to the minimum temperature
(LTF) at which fast charging or top-off is allowed. If the
voltage on pin TS rises above VLTF, the bq2000
suspends fast charge or top-off but does not terminate
charge. When the voltage falls back below VLTF, fast
charge or top-off resumes from the point where
suspended. Trickle-charge is allowed during this
condition.
Table 4 summarizes these various conditions.
Charge Status Display
The charge status is indicated by open-drain output
LED. Table 5 summarizes the display output of the
bq2000.
Rf
Table 5. Charge Status Display
Charge Action State
RSNS
Battery absent
High impedance
Pre-charge qualification
1Hz flash
Power Supply ground
Trickle charge (before fast charge)
1Hz flash
bq2000 ground
Fast charging
Low
Top-off or trickle (after fast charge,
NiCd, NiMH only)
High impedance
Charge complete
High impedance
Sleep mode
High impedance
Charge suspended (VTS > VLTF)
1Hz flash
Cf
2
BAT-
LED Status
1 SNS
VSS
bq2000
2000CS.eps
Figure 9. Current-Sensing Circuit
10
bq2000
Absolute Maximum Ratings
Minimum
Maximum
Unit
VCC
Symbol
VCC relative to VSS
Parameter
-0.3
+7.0
V
VT
DC voltage applied on any pin, excluding VCC relative to VSS
-0.3
+7.0
V
TOPR
Operating ambient temperature
-20
+70
°C
TSTG
Storage temperature
-40
+125
°C
TSOLDER
Soldering temperature
-
+260
°C
Note:
Notes
10s max.
Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation
should be limited to the Recommended DC Operating Conditions detailed in this data sheet. Exposure to
conditions beyond the operational limits for extended periods of time may affect device reliability.
DC Thresholds
(TA = TOPR; VCC = 5V ±20% unless otherwise specified)
Symbol
VTCO
VHTF
VLTF
Parameter
Temperature cutoff
High-temperature fault
Low-temperature fault
Rating
0.225 * VCC
0.25 * VCC
0.5 * VCC
Tolerance
±5%
±5%
±5%
Unit
V
V
V
VMCV
VLBAT
PVD
Maximum cell voltage
2.00
±0.75%
V
950
3.8
±5%
±20%
mV
mV
50
±10
mV
Voltage at pin SNS
-50
±10
mV
Voltage at pin SNS
VSLP
Minimum cell voltage
BAT input change for PVD detection
High threshold at SNS, resulting in
MOD-low
Low threshold at SNS, resulting in
MOD-high
Sleep-mode input threshold
VCC - 1
±0.5
V
Applied to pin BAT
VRCH
Recharge threshold
VMCV - 0.1
±0.02
V
At pin BAT
VSNSHI
VSNSLO
11
Notes
Voltage at pin TS
Voltage at pin TS
Voltage at pin TS
VBAT > VMCV inhibits
fast charge
Voltage at pin BAT
bq2000
Recommended DC Operating Conditions (TA = TOPR)
Symbol
Condition
Minimum
Typical
Maximum
Unit
Notes
VCC
Supply voltage
4.0
5.0
6.0
V
ICC
Supply current
-
0.5
1
mA
Exclusive of external loads
ICCS
Sleep current
-
-
5
µA
VBAT = VSLP
VTS
Thermistor input
0.5
-
VCC
V
VTS < 0.5V prohibited
VOH
Output high
VCC - 0.6
-
-
V
MOD, IOH = 10mA
VOL
Output low
-
-
0.2
V
MOD, LED, IOL = 10mA
IOZ
High-impedance leakage
current
-
-
5
µA
LED
Isnk
Sink current
-
-
20
mA
MOD, LED
RMTO
Charge timer resistor
2
-
250
kΩ
CMTO
Charge timer capacitor
0.001
-
1.0
µF
Note:
All voltages relative to VSS except as noted.
Impedance
Symbol
Parameter
Minimum
Typical
Maximum
Unit
RBAT
Battery input impedance
10
-
-
MΩ
RTS
TS input impedance
10
-
-
MΩ
RSNS
SNS input impedance
10
-
-
MΩ
Minimum
Typical
Maximum
Unit
Timing
Symbol
(TA = TOPR; VCC = 5V ±20% unless otherwise specified)
Parameter
dMTO
MTO time-base variation
-5
-
+5
%
fTRKL
Pulse-trickle frequency
0.9
1.0
1.1
Hz
12
bq2000
8-Pin DIP (PN)
8-Pin PN (0.300" DIP)
Inches
D
E1
E
A
L
B1
A1
C
e
B
S
G
Millimeters
Dimension
A
Min.
Max.
Min.
Max.
0.160
0.180
4.06
4.57
A1
0.015
0.040
0.38
1.02
B
0.015
0.022
0.38
0.56
B1
0.055
0.065
1.40
1.65
C
0.008
0.013
0.20
0.33
D
0.350
0.380
8.89
9.65
E
0.300
0.325
7.62
8.26
E1
0.230
0.280
5.84
7.11
e
0.300
0.370
7.62
9.40
G
0.090
0.110
2.29
2.79
L
0.115
0.150
2.92
3.81
S
0.020
0.040
0.51
1.02
8-Pin SOIC Narrow (SN)
8-Pin SN (0.150" SOIC)
Inches
13
Millimeters
Dimension
A
Min.
Max.
Min.
Max.
0.060
0.070
1.52
1.78
A1
0.004
0.010
0.10
0.25
B
0.013
0.020
0.33
0.51
C
0.007
0.010
0.18
0.25
D
0.185
0.200
4.70
5.08
E
0.150
0.160
3.81
4.06
e
0.045
0.055
1.14
1.40
H
0.225
0.245
5.72
6.22
L
0.015
0.035
0.38
0.89
bq2000
8-Pin TSSOP (PW)
14
bq2000
Data Sheet Revision History
Change No.
Note:
Page No.
Description
Nature of Change
1
4
MTO equation
Was: MTO = R ∗C∗71,976
Is: MTO = RMTO ∗CMTO ∗35,988
1
6
Trickle-pulse width
equation
Replaced equation with Figure 6
1
7
Figure 7
Schematic updated
1
10
VTCO, VHTF, VLTF
Tolerance updated
1
11
RMTO, CMTO
Values updated
2
8
VLBAT
Corrected values in Tables 2 and 3
3
1, 13
Package option
Added TSSOP
3
3
State diagram
Added
3
8
Schematic updated
3
11
VTSO, VHTF,VLTF
Tolerance updated
3
7
Top-off charge
Updated requirement for enabling top-off
4
7
Figure 7
Updated tolerance on the curve
4
12
VOH
Was: Minimum VOH = VCC - 0.2 at IOH = 20mA
Is: Minimum VOH = VCC - 0.6 at IOH = 10mA
4
12
VOL
Was: IOH = 20mA
Is: IOH = 10mA
5
3
Figure 2
Battery voltage detail was: (checked at all times)
Is: Voltage regulation checked constantly. PVD checked at rate
of MTO/64.
5
3
Figure 2
Battery temperature detail was: (checked at all times)
Is: (checked 1,750 times per second)
5
14
Change package
Was: 8-Pin TSSOP ∼TS Package Suffix
Is: 8-Pin PSOP
5
15
Change ordering
information
Was: TS = 8-pin TSSOP
Is: PW = 8-pin TSSOP
6
7
Change value
Was: 15kW
Is: 250kW
Change 1 = Jan. 1999 B changes to Final from Sept. 1998 Preliminary data sheet.
Change 2 = Mar. 1999 C changes from Jan. 1999 B.
Change 3 = May 1999 D changes from Mar. 1999 C.
Change 4 = February 2000 E changes from May 1999 D.
Change 5 = February 2001 F changes from February 2000 E.
Change 6 = January 2008 G changes from February 2001 F.
15
bq2000
Ordering Information
bq2000
Package Option:
PN = 8-pin narrow plastic DIP
SN = 8-pin narrow SOIC
PW = 8-pin TSSOP
Device:
bq2000 Multi-Chemistry Fast-Charge IC with Peak Voltage
Detection
16
PACKAGE OPTION ADDENDUM
www.ti.com
8-Jan-2008
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
BQ2000PN-B5
ACTIVE
PDIP
P
8
50
Pb-Free
(RoHS)
CU NIPDAU
N / A for Pkg Type
BQ2000PW
ACTIVE
TSSOP
PW
8
150
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
BQ2000PWG4
ACTIVE
TSSOP
PW
8
150
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
BQ2000PWR
ACTIVE
TSSOP
PW
8
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
BQ2000PWRG4
ACTIVE
TSSOP
PW
8
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
BQ2000SN-B5
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
BQ2000SN-B5G4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
BQ2000SN-B5TR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
BQ2000SN-B5TRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
Lead/Ball Finish
MSL Peak Temp (3)
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
30-Jan-2009
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
Diameter Width
(mm) W1 (mm)
A0 (mm)
B0 (mm)
K0 (mm)
P1
(mm)
W
Pin1
(mm) Quadrant
BQ2000PWR
TSSOP
PW
8
2000
330.0
12.4
7.0
3.6
1.6
8.0
12.0
Q1
BQ2000SN-B5TR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
30-Jan-2009
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
BQ2000PWR
TSSOP
PW
8
2000
346.0
346.0
29.0
BQ2000SN-B5TR
SOIC
D
8
2500
346.0
346.0
29.0
Pack Materials-Page 2
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Amplifiers
Data Converters
DLP® Products
DSP
Clocks and Timers
Interface
Logic
Power Mgmt
Microcontrollers
RFID
RF/IF and ZigBee® Solutions
amplifier.ti.com
dataconverter.ti.com
www.dlp.com
dsp.ti.com
www.ti.com/clocks
interface.ti.com
logic.ti.com
power.ti.com
microcontroller.ti.com
www.ti-rfid.com
www.ti.com/lprf
Applications
Audio
Automotive
Broadband
Digital Control
Medical
Military
Optical Networking
Security
Telephony
Video & Imaging
Wireless
www.ti.com/audio
www.ti.com/automotive
www.ti.com/broadband
www.ti.com/digitalcontrol
www.ti.com/medical
www.ti.com/military
www.ti.com/opticalnetwork
www.ti.com/security
www.ti.com/telephony
www.ti.com/video
www.ti.com/wireless
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2009, Texas Instruments Incorporated
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement