AMS AS1111 Power Management Datasheet
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General Description
Figure 1:
Added Value of Using AS1111
Benefits
High efficient
Supports a variety of end applications
Extended battery life
Suitable for EMF sensitive environment
Small PCB area
Cost effective, small package
AS1111
Low–Dropout LED Drivers
The AS1111A/AS1111B/AS1111C are LED drivers designed to match current source bias for any color LED, including white and blue. The devices can drive up to 4 high-current LEDs, and the LED current is programmable using an external resistor
(RSET).
The AS1111A LED currents are 460 x I
SET
(per LED, typ) at an LED cathode voltage (V
SAT
) of 150mV and 650 x I
SET
(typ) at a V
SAT of 1V, where I
SET
is the current through RSET connected to pin
CTRL.
The AS1111B & AS1111C LED currents are
230 x I
SET
(per LED, typ) at a V
SAT
of 150mV and 325 x I
SET
(typ) at a V
SAT
of 1V.
All AS1111 versions incorporate a chip-enable feature via pin
EN. When the devices are disabled, the supply current drops down to less than 1
μ
A. The AS1111A and AS1111B are available in a 6-pin WL-CSP package with 0.4mm pitch. The AS1111C is available in an 8-pin MLPD (2x2mm) package with 0.5mm pitch.
and
Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS1111, Low–Dropout LED Drivers are listed below:
Features
• Ultra Low Voltage Drop: less than 150mV
• Analog and PWM Brightness Control
• Up to 80mA per LED (AS1111A)
• Up to 40mA per LED (AS1111B, AS1111C)
• Active-Low Shutdown Mode
• Low Shutdown Current: less than 1
μ
A
• No electromagnetic interference
• No switching noise
• Less external components needed
• 6-pin WL-CSP with 0.4mm pitch
• 8-pin MLPD (2x2mm) with 0.5mm pitch
ams Datasheet
[v1-06] 2015-Apr-07
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AS1111 −
General Description
Applications
The AS1111 devices are ideal for LED displays and keyboard backlights, as well as lighting management units for battery powered audio devices such as
• MP3 and CD players,
• Mobile and cordless phones,
• PDAs,
• Portable DVD players, and
• Consumer electronics.
Application Diagram
The typical application diagram of this device for reference is shown below:
Figure 2:
AS1111 Typical Application Diagram
V
IN
V
SET
3.0V
ON
OFF
R
SET
CTRL
EN
V
SAT
I1/I2
AS1111A
I3/I4
GND
V
IN
V
SET
3.0V
ON
OFF
R
SET
CTRL
EN
V
SAT
I1 I2 I3
AS1111B
GND
V
IN
V
SET
3.0V
ON
OFF
R
SET
CTRL
V
SAT
EN
I1 I2 I3
AS1111C
GND
I4
ams Datasheet
[v1-06] 2015-Apr-07
AS1111 −
Pin Assignment
Pin Assignment
Figure 3:
Pin Assignment of AS1111A/B and AS1111C
3
4
1
2
AS1111C
MLPD 8-pin 2x2mm
Exposed pad: GND
9
6
5
8
7
Pin Assignment:
Shows the TOP through view pin assignment of the AS1111A/B and AS1111C.
Pin Description
Figure 4:
Pin Description of AS1111
Pin Number
AS1111A AS1111B AS1111C
A2
B2
A2
-
4
-
B3 B3 7
B1
-
-
-
B1
A3
B2
A1
1
5
6
2
Pin
Name
Description
I1
I2
I3
GND
GND
CTRL
EN
Ground
. Connect to GND
Ground
. Connect to GND (AS1111A)
Control
. Sets the LED current; connect to external resistor RSET
Enable
. Device enable/PWM Input.
1 = Normal Operation
0 = Shutdown
Input1
. Connect to cathode of LED1 (AS1111B&C)
Input2
. Connect to cathode of LED2 (AS1111B&C)
Input3
. Connect to cathode of LED3 (AS1111B&C)
ams Datasheet
[v1-06] 2015-Apr-07
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AS1111 −
Pin Assignment
Pin Number
AS1111A AS1111B AS1111C
A3
A1
-
-
-
3
8
-
-
9
Pin
Name
I1/I2
I3/I4
I4
NC
Description
Input1/2
. Connect to cathode of LED1 (AS1111A)
Input3/4
. Connect to cathode of LED2 (AS1111A)
Input4
. Connect to cathode of LED4 (AS1111C)
Not Connected
. (AS1111C)
Exposed Pad
. Connect this pad to the GND plane on the PCB to maximize power dissipation
(AS1111C)
Pin Description:
Shows the pin number, name and description of every pin.
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ams Datasheet
[v1-06] 2015-Apr-07
AS1111 −
Absolute Maximum Ratings
Absolute Maximum Ratings
Stresses beyond those listed under
may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under
Characteristics is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
Figure 5:
Absolute Maximum Ratings
Symbol
ESD
HBM
T
A
R
THJA
T
J
T
STRG
T
BODY
RH
NC
MSL
Parameter Min Max Units Comments
Electrical Parameters
Supply Voltage to
Ground
5V pins
Input Current
(latch-up immunity)
-0.3
-100
5.0
100
V mA
Applicable for pins:
I1, I2, I3, I4, I1/I2, I3/I4, CTRL, EN
Norm: JEDEC JESD78
Electrostatic Discharge
Electrostatic Discharge
HBM
±2 kV Norm: JEDEC JESD22-A114F
Temperature Ranges and Storage Conditions
Operating Temperature -40 85 °C
Junction to Ambient
Thermal Resistance
60
95
125
°C/W
°C/W
°C
MLPD
WL-CSP
WL-CSP Junction Temperature
Storage Temperature
Range
Package Body
Temperature
Relative Humidity non-condensing
Moisture Sensitivity
Level (WL-CSP & MLPD)
-55
5
1
125
260
85
°C
°C
%
Norm: IPC/JEDEC J-STD-020
Represents an unlimited floor life time
Note(s) and/or Footnote(s):
1. Junction-to-ambient thermal resistance is very dependent on application and board-layout. In situations where high maximum power dissipation exists, special attention must be paid to thermal dissipation during board design.
2. The reflow peak soldering temperature (body temperature) is specified according to IPC/JEDEC J-STD-020 “Moisture/Reflow
Sensitivity Classification for Non-hermetic Solid State Surface Mount Devices.”
ams Datasheet
[v1-06] 2015-Apr-07
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AS1111 −
Electrical Characteristics
Electrical Characteristics
All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical
Quality Control) methods.
Figure 6:
Electrical Characteristics
Symbol
V
SAT
V
EN_HIGH
V
EN_LOW
I
SET
I
SET_OFF
I
IN_OFF
Eff
Match
Parameter
Cathode Voltage
Enable Voltage High
Enable Voltage Low
I
SET range
I
SET
in OFF mode
I
IN
in OFF mode
Peak Efficiency
LED to LED Current
Matching
Note
at pins I1, I2, I3, I4, I1/I2,
I3/I4 pin EN pin EN
V
EN
= 3V
V
CTRL
= 3V, V
SAT
= 3V,
V
EN
= 0V
V
CTRL
= 3V, V
SAT
= 3V,
V
EN
= 0V, T
AMB
= 25°C
V
CTRL
= 3V, V
SAT
= 3V,
V
EN
= 0V,
T
AMB
= -40°C to 85°C
(for AS1111A)
V
CTRL
= 3V, V
SAT
= 3V,
V
EN
= 0V,
T
AMB
= -40°C to 85°C
V
IN
= 3V, V
EN
= 3V
V
EN
= 3V
Min
0.15
2.2
0
25
95
-3
Typ Max
0.6
3.6
3.6
0.5
150
0.1
1
Unit
V
V
V
μ
A
μ
A
0.1
1
4
2
3
μ
A
μ
A
μ
A
Electrical Characteristics:
Shows the Electrical Characteristics of the LED Driver. T
AMB
= –40 to 85°C (unless otherwise specified)
Note(s) and/or Footnote(s):
1. Efficiency = (V
IN
– V
SAT
)/V
IN
. Guaranteed by design.
%
%
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AS1111 −
Electrical Characteristics
Figure 7:
Output Current Multiplication Ratio
AS1111A
AS1111B
AS1111C
I
SET
= 25
μ
A, V
SAT
= 150mV, V
EN
= 3V
I
SET
= 40
μ
A, V
SAT
= 150mV, V
EN
= 3V
I
SET
= 75
μ
A, V
SAT
= 150mV, V
EN
= 3V
I
SET
= 25
μ
A, V
SAT
= 600mV, V
EN
= 3V
I
SET
= 40
μ
A, V
SAT
= 600mV, V
EN
= 3V
I
SET
= 75
μ
A, V
SAT
= 600mV, V
EN
= 3V
I
SET
= 25
μ
A, V
SAT
= 1V, V
EN
= 3V
I
SET
= 40
μ
A, V
SAT
= 1V, V
EN
= 3V
I
SET
= 75
μ
A, V
SAT
= 1V, V
EN
= 3V
I
SET
= 25
μ
A, V
SAT
= 150mV, V
EN
= 3V
I
SET
= 40
μ
A, V
SAT
= 150mV, V
EN
= 3V
I
SET
= 75
μ
A, V
SAT
= 150mV, V
EN
= 3V
I
SET
= 25
μ
A, V
SAT
= 600mV, V
EN
= 3V
I
SET
= 40
μ
A, V
SAT
= 600mV, V
EN
= 3V
I
SET
= 75
μ
A, V
SAT
= 600mV, V
EN
= 3V
I
SET
= 25
μ
A, V
SAT
= 1V, V
EN
= 3V
I
SET
= 40
μ
A, V
SAT
= 1V, V
EN
= 3V
I
SET
= 75
μ
A, V
SAT
= 1V, V
EN
= 3V
Output Current Multiplication Ratio:
Shows the OCMR of the LED Driver for setting of I
SET
and different
Cathode Voltages V
SAT
. T
AMB
= –40 to 85°C (unless otherwise specified)
205
235
230
220
170
145
220
215
425
415
470
460
440
175
350
335
295
435
295
335
330
315
240
210
310
305
610
590
670
660
630
250
500
480
420
620
385
435
430
410
310
275
405
395
795
765
870
860
820
325
650
625
545
805
ams Datasheet
[v1-06] 2015-Apr-07
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Typical Operating
Characteristics
AS1111 −
Typical Operating Characteristics
Figure 8:
SET Current vs. CTRL Voltage
Figure 9:
SET Current vs. SET Voltage, R
SET
= 30kΩ
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AS1111 −
Typical Operating Characteristics
Figure 10:
LED Current vs. SAT Voltage
Figure 11:
OCMR vs. SET Current
700
600
500
400
300
200
100
AS1111A
0
0 20 40 60 80 100 120 140 160
I
SET
(µA)
350
300
250
200
150
100
50
AS1111B
AS1111C
0
0 20 40 60 80 100 120 140 160
I
SET
(µA)
ams Datasheet
[v1-06] 2015-Apr-07
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Figure 12:
LED Current vs. SET Resistor, VSET = 3V
AS1111 −
Typical Operating Characteristics
Figure 13:
LED Current vs. SET Resistor, VSET = 3V
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ams Datasheet
[v1-06] 2015-Apr-07
AS1111 −
Typical Operating Characteristics
Figure 14:
LED Current vs. Temperature, VLED = -0.25V, I
SET
= 50
μ
A
Figure 15:
LED Current vs. SET Current ams Datasheet
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AS1111 −
Typical Operating Characteristics
Figure 16:
V
SET
Voltage Transient Response
1V/Div
20mA/Div
1us/Div
Figure 17:
V
EN
Voltage Transient Response
1V/Div
20mA/Div
1us/Div
ams Datasheet
[v1-06] 2015-Apr-07
AS1111 −
Detailed Description
Detailed Description
Setting of the LED Current
The current going into the LEDs is approximately OCMR times greater than the current I
SET
. The LED current is controlled by
V
SET
and R
SET
according to the formula:
(EQ1)
I
LED
= OCMR ⋅
V
SET
R
– V
SET
For V
SET
= 3V and a specific LED current, the value of R
SET
can be determined using the graphs shown in
Figure 13 . For any other option, the value of I
SET
can be determined using the graph in
LED brightness can also be adjusted by driving pin EN or pin
CTRL with a PWM signal.
ams Datasheet
[v1-06] 2015-Apr-07
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AS1111 −
Pack age Drawings & Mark ings
Package Drawings & Markings
Figure 18:
MLPD-8 2x2mm 0.5mm Pitch Package Drawing
RoHS
Green
Ref
bbb ccc ddd eee e
D2
E2 aaa fff
N
D
E
L b
A
A1
A3
Min Nom
0.51
0.00
0.225
0.18
-
-
-
1.45
0.75
-
-
0.55
0.02
0.15 REF
0.325
0.25
2.00 BSC
2.00 BSC
0.50 BSC
1.60
0.90
0.15
0.10
0.10
0.05
0.08
0.10
8
Max
0.60
0.05
0.425
0.30
-
-
-
-
-
1.70
1.00
-
Note(s) and/or Footnote(s):
1. Dimensioning and Tolerancing conform to ASME Y14.5M-1994.
2. All dimensions are in millimeters. Angles are in degrees.
3. Coplanarity applies to the exposed heat slug as well as the terminal.
4. Radius on terminal is optional.
5. N is the total number of terminals.
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ams Datasheet
[v1-06] 2015-Apr-07
AS1111 −
Package Drawings & Markings
Figure 19:
WL-CSP-6 0.4mm Pitch Package Drawing
Note(s) and/or Footnote(s):
1. Pin1 = A1
2. ccc Coplanarity
3. All dimensions are in μm
RoHS
Green
ams Datasheet
[v1-06] 2015-Apr-07
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AS1111 −
Pack age Drawings & Mark ings
Figure 20:
AS1111A & AS1111B Package Marking
WL-CSP
Figure 21:
AS1111C Package Marking
MLPD package
AAR
XXX
Figure 22:
AS1111 Package Code
YY
Marking for WL-CSP
XXXX
Tracecode for WL-CSP
AAR
Marking for MLPD
XXX
Tracecode for MLPD
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AS1111 −
Ordering & Contact Information
Ordering & Contact Information
Figure 23:
Ordering Information
Ordering Code Marking
AS1111A-BWLT
AS1111B-BWLT
AS1111C-BDFT
CY
CZ
AAR
Description
Dual LED driver with enable and
80mA LED current per channel
Triple LED driver with enable and
40mA LED current per channel
Quad LED driver with enable and
40mA LED current per channel
Delivery Form
Tape & Reel
Tape & Reel
Tape & Reel
Package
6-pin WL-CSP
0.4mm pitch
6-pin WL-CSP
0.4mm pitch
MLPD-8lead
(2mm x 2mm)
Buy our products or get free samples online at: www.ams.com/ICdirect
Technical Support is available at: www.ams.com/Technical-Support
Provide feedback about this document at: www.ams.com/Document-Feedback
For further information and requests, e-mail us at: [email protected]
For sales offices, distributors and representatives, please visit: www.ams.com/contact
Headquarters
ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten
Austria, Europe
Tel: +43 (0) 3136 500 0
Website: www.ams.com
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AS1111 −
RoHS Compliant & ams Green Statement
RoHS Compliant & ams Green
Statement
RoHS:
The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br):
ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants
(Br or Sb do not exceed 0.1% by weight in homogeneous material).
Important Information:
The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG 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. ams AG 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. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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AS1111 −
Copyrights & Disclaimer
Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 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.
Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of
Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams 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 ams AG for current information. This product is intended for use in 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 ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed.
ams 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 ams AG rendering of technical or other services.
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AS1111 −
Document Status
Document Status
Document Status
Product Preview
Preliminary Datasheet
Datasheet
Datasheet (discontinued)
Product Status
Pre-Development
Pre-Production
Production
Discontinued
Definition
Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice
Information in this datasheet is based on products in the design, validation or qualification phase of development.
The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice
Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of
Trade
Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of
Trade, but these products have been superseded and should not be used for new designs
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AS1111 −
Revision Information
Revision Information
Changes from 1-01 (2013-Nov) to current revision 1-06 (2015-Apr-07)
1-01 (2013-Nov) to 1-03 (2014-Dec-03)
Content was updated to the latest
ams
design
Updated Figure 3
1-03 (2014-Dec-03) to 1-04 (2015-Mar-20)
Updated caption below Figure 3
Updated Figure 5
Updated Figure 11
Updated Figure 16 & Figure 17
1-04 (2015-Mar-20) to 1-05 (2015-Apr-06)
Updated Figure 5
Updated Figures 16 & 17
1-05 (2015-Apr-06) to 1-06 (2015-Apr-07)
Updated text under General Description
Note(s) and/or Footnote(s):
1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
2. Correction of typographical errors is not explicitly mentioned.
Page
3
5
12
9
12
3
5
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Content Guide
AS1111 −
Content Guide
1 General Description
1 Key Benefits & Features
2 Applications
2 Block Diagram
3 Pin Assignment
3 Pin Description
4 Absolute Maximum Ratings
6 Electrical Characteristics
8 Typical Operating Characteristics
13 Detailed Description
13 Setting of the LED Current
14 Package Drawings & Markings
17 Ordering & Contact Information
18 RoHS Compliant & ams Green Statement
19 Copyrights & Disclaimer
20 Document Status
21 Revision Information
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