AS3661-BWLT-500

AS3661-BWLT-500 Datasheet

AS3661

Part	Datasheet
AS3661-BWLT-500	AS3661-BWLT-500 (pdf)

Related Parts	Information
AS3661-EB	AS3661-EB
AS3661-BWLT	AS3661-BWLT
AS3661	AS3661

PDF Datasheet Preview
Datasheet AS3661 Programmable 9-channel LED Driver 1 General Description The AS3661 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A highefficiency charge pump enables LED driving over full LiIon battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control. The AS3661 maintains excellent efficiency over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. AS3661 is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA typ . The AS3661 has an I2C-compatible control interface with four pin selectable addresses. Also, the device has a flexible General Purpose Output GPO , which can be used as a digital control pin for other devices. INT pin can be used to notify processor when a lighting sequence has ended interrupt - function . Also, the device has a trigger input interface, which allows synchronization between multiple devices.The device requires only four small and low-cost ceramic capacitors. The AS3661 is available in a tiny WL-CSP-25 2.285x2.285mm 0.4mm pitch package. 2 Key Features Three independent program execution engines 9 programmable outputs with mA full-scale current, 8- bit current setting resolution and 12-bit PWM control resolution Adaptive charge pump with 1x and 1.5x gain provides up to 95% LED drive efficiency Charge pump with soft start and overcurrent/short circuit protection Built-in LED test Automatic power save mode IVDD = 10 µA typ. Two wire, I2C-compatible, control interface Flexible instruction set Large SRAM program memory Small application circuit Source high side drivers Minimum number of external components Architecture supports color control 3 Applications The product is ideal for fun and indicator lights, LED backlighting, and programmable current source. Figure AS3661 LED Driver Block Diagram 0 1 23-!0 ' ;5 ; '3 ' '4 '5 '2 '6 '7 1 - 85 AS3661 Datasheet Contents 1 General Description 1 2 Key Features 3 Applications 1 4 Pinout 5 Pin Assignment Pin Description 5 Absolute Maximum Ratings 7 6 Electrical Characteristics 8 7 Typical Operating Characteristics 12 8 Detailed Description Programming LED Error Detection Energy Efficiency Temperature Compensation Modes of Operation RESET STANDBY STARTUP NORMAL POWER SAVE Charge Pump Operational Description Overview Output Resistance Controlling the Charge Pump LED Forward Voltage Monitoring Gain Change Hysteresis Automatic Power Save Mode PWM Power Save Mode LED Driver Operational Description Powering LEDs Controlling the High-side LED Drivers I2C Compatible Control Interface I2C Address selection Bus Not Busy Start Data Transfer Stop Data Transfer Data Valid Acknowledge Program Downloading Register Set Control Register Details ENABLE/ ENGINE CONTROL1 ENGINE CNTRL2 OUTPUT DIRECT/RATIOMETRIC MSB and LSB OUTPUT ON/OFF CONTROL MSB and LSB 2 - 85 AS3661 Datasheet LEDx Control LEDx PWM LEDx CURRENT CONTROL MISC ENGINEx PC STATUS/INTERRUPT GPO VARIABLE RESET TEMP ADC CONTROL TEMPERATURE READ TEMPERATURE WRITE LED TEST CONTROL LED TEST ADC ENGINE1 VARIABLE A ENGINE2 VARIABLE A ENGINE3 VARIABLE A MASTER FADER1 49 MASTER FADER2 4A MASTER FADER3 ENG1 PROG START ADDR ENG2 PROG START ADDR ENG3 PROG START ADDR PROG MEM PAGE SELECT ENG1 MAPPING MSB 71H ENG1 MAPPING LSB ENG2 MAPPING MSB ENG2 MAPPING LSB ENG3 MAPPING MSB ENG3 MAPPING LSB GAIN CHANGE CTRL Instruction Set LED Driver Instructions RAMP Numerical Operands RAMP Variables SET PWM Numerical Operands SET PWM Variables WAIT LED Mapping Instructions MUX_LD_START MUX_LD_END MUX_MAP_START MUX_SEL MUX_CLR MUX_MAP_NEXT MUX_MAP_PREV MUX_LD_NEXT MUX_LD_PREV MUX_MAP_ADDR 3 - 85 AS3661 Datasheet MUX_LD_ADDR Branch Instructions RST BRANCH Numerical BRANCH Variables INT END TRIGGER JNE/JL/JGE/JE Arithmetic Instructions LD ADD Numerical Operands ADD Variables SUB Numerical SUB Variables 9 Typical Application 81 Recommended External Components 10 Package Drawings and Markings 83 11 Ordering Information 84 4 - 85 AS3661 Datasheet - Pinout 4 Pinout Pin Assignment Figure Pin Assignments Top View Pin Description Table Pin Description for AS3661 Pin Number A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 C1 C2 C3 C4 C5 D1 D2 Pin Name LED1 LED2 VCP C2C2+ LED3 LED4 ASEL1 C1C1+ LED5 LED6 ASEL0 EN VBAT LED7 LED8 CLK32K Description LED1 Output. Current source from VCP. LED2 Output. Current source from VCP. Charge Pump output. make a short connection to capacitor CVCPOUT. Charge Pump flying capacitor make a short connection to capacitor CFLY2. Charge Pump flying capacitor make a short connection to capacitor CFLY2. LED3 Output. Current source from VCP. LED4 Output. Current source from VCP. Digital input - address select Charge Pump flying capacitor make a short connection to capacitor CFLY1. Charge Pump flying capacitor make a short connection to capacitor CFLY1. LED5 Output. Current source from VCP. LED6 Output. Current source from VCP. Digital input - address select Enable. Active high digital input. Positive Power Supply Input LED7 Output. Current source from VBAT. LED8 Output. Current source from VBAT. Interrupt Output. Open drain digital output for microcontroller unit, leave unconnected if not used. Digital Clock Input. Connect a 32kHz signal if this signal is not available, connect this pin to GND. 5 - 85 AS3661 Datasheet - Pinout Table Pin Description for AS3661 Pin Number Pin Name Ground LED9 Output. Current source from VBAT. General Purpose Output. Leave unconnected if not used. TRIG Trigger Input. Open drain, connect to ground if not used. Serial-Data I/O. Open drain digital I/O data pin. Serial-Clock Input 6 - 85 AS3661 Datasheet - Absolute Maximum Ratings 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 Table Electrical Characteristics on page 8 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table Absolute Maximum Ratings Parameter Min Max VBAT, VCP, C1+, C1-, C2+, C2- to GND VCP to VBAT LED1, LED2....LED9 to GND SDA, SCL, EN, CLK32K, TRIG, INT, GPO, ASEL0, ASEL1 to GND Electrostatic Discharge ESD HBM LED1 to LED2 ESD HBM all other pins ESD MM ESD CDM Datasheet - Ordering Information 11 Ordering Information The devices are available as the standard products shown in Table Table Ordering Information Ordering Code Marking Desciption Delivery Form AS3661-BWLT AS3661 Programmable 9-channel LED Driver Tape and Reel Package WL-CSP-25 2.285x2.285mm 0.4mm pitch Note All products are RoHS compliant and austriamicrosystems green. Buy our products or get free samples online at ICdirect: Technical Support is found at For further information and requests, please contact us or find your local distributor at 84 - 85 AS3661 Datasheet - Ordering Information Copyrights Copyright 1997-2012, 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. Disclaimer 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. 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 Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 85 - 85

PDF Datasheet Preview

Datasheet

AS3661

Programmable 9-channel LED Driver
1 General Description

The AS3661 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A highefficiency charge pump enables LED driving over full LiIon battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control. The AS3661 maintains excellent efficiency over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. AS3661 is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA typ .

The AS3661 has an I2C-compatible control interface with four pin selectable addresses. Also, the device has a flexible General Purpose Output GPO , which can be used as a digital control pin for other devices. INT pin can be used to notify processor when a lighting sequence has ended interrupt - function . Also, the device has a trigger input interface, which allows synchronization between multiple devices.The device requires only four small and low-cost ceramic capacitors.

The AS3661 is available in a tiny WL-CSP-25 2.285x2.285mm 0.4mm pitch package.
2 Key Features

Three independent program execution engines 9 programmable outputs with mA full-scale current, 8- bit current setting resolution and 12-bit PWM control resolution Adaptive charge pump with 1x and 1.5x gain provides up to 95% LED drive efficiency Charge pump with soft start and overcurrent/short circuit protection Built-in LED test Automatic power save mode IVDD = 10 µA typ. Two wire, I2C-compatible, control interface Flexible instruction set Large SRAM program memory Small application circuit Source high side drivers Minimum number of external components Architecture supports color control
3 Applications

The product is ideal for fun and indicator lights, LED backlighting, and programmable current source.

Figure AS3661 LED Driver Block Diagram
0 1 23-!0
' ;5 ;
'3 ' '4 '5 '2 '6 '7
1 - 85

AS3661

Datasheet

Contents
1 General Description 1
2 Key Features 3 Applications 1 4 Pinout 5

Pin Assignment Pin Description 5 Absolute Maximum Ratings 7 6 Electrical Characteristics 8 7 Typical Operating Characteristics 12 8 Detailed Description Programming LED Error Detection Energy Efficiency Temperature Compensation Modes of Operation

RESET STANDBY STARTUP NORMAL POWER SAVE Charge Pump Operational Description Overview Output Resistance Controlling the Charge Pump LED Forward Voltage Monitoring Gain Change Hysteresis Automatic Power Save Mode PWM Power Save Mode LED Driver Operational Description Powering LEDs Controlling the High-side LED Drivers I2C Compatible Control Interface I2C Address selection Bus Not Busy Start Data Transfer Stop Data Transfer Data Valid Acknowledge Program Downloading Register Set Control Register Details ENABLE/ ENGINE CONTROL1 ENGINE CNTRL2 OUTPUT DIRECT/RATIOMETRIC MSB and LSB OUTPUT ON/OFF CONTROL MSB and LSB
2 - 85

AS3661

Datasheet

LEDx Control LEDx PWM LEDx CURRENT CONTROL MISC ENGINEx PC STATUS/INTERRUPT GPO VARIABLE RESET TEMP ADC CONTROL TEMPERATURE READ TEMPERATURE WRITE LED TEST CONTROL LED TEST ADC ENGINE1 VARIABLE A ENGINE2 VARIABLE A ENGINE3 VARIABLE A MASTER FADER1 49 MASTER FADER2 4A MASTER FADER3 ENG1 PROG START ADDR ENG2 PROG START ADDR ENG3 PROG START ADDR PROG MEM PAGE SELECT ENG1 MAPPING MSB 71H ENG1 MAPPING LSB ENG2 MAPPING MSB ENG2 MAPPING LSB ENG3 MAPPING MSB ENG3 MAPPING LSB GAIN CHANGE CTRL Instruction Set LED Driver Instructions RAMP Numerical Operands RAMP Variables SET PWM Numerical Operands SET PWM Variables WAIT LED Mapping Instructions MUX_LD_START MUX_LD_END MUX_MAP_START MUX_SEL MUX_CLR MUX_MAP_NEXT MUX_MAP_PREV MUX_LD_NEXT MUX_LD_PREV MUX_MAP_ADDR
3 - 85

AS3661

Datasheet

MUX_LD_ADDR Branch Instructions
RST BRANCH Numerical BRANCH Variables INT END TRIGGER JNE/JL/JGE/JE Arithmetic Instructions LD ADD Numerical Operands ADD Variables SUB Numerical SUB Variables 9 Typical Application 81 Recommended External Components 10 Package Drawings and Markings 83 11 Ordering Information 84
4 - 85

AS3661

Datasheet - Pinout
4 Pinout

Pin Assignment

Figure Pin Assignments Top View

Pin Description

Table Pin Description for AS3661

Pin Number A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 C1 C2 C3 C4 C5 D1 D2

Pin Name LED1 LED2 VCP C2C2+ LED3 LED4 ASEL1 C1C1+ LED5 LED6 ASEL0 EN VBAT LED7 LED8

CLK32K

Description LED1 Output. Current source from VCP. LED2 Output. Current source from VCP. Charge Pump output. make a short connection to capacitor CVCPOUT. Charge Pump flying capacitor make a short connection to capacitor CFLY2. Charge Pump flying capacitor make a short connection to capacitor CFLY2. LED3 Output. Current source from VCP. LED4 Output. Current source from VCP. Digital input - address select Charge Pump flying capacitor make a short connection to capacitor CFLY1. Charge Pump flying capacitor make a short connection to capacitor CFLY1. LED5 Output. Current source from VCP. LED6 Output. Current source from VCP. Digital input - address select Enable. Active high digital input. Positive Power Supply Input LED7 Output. Current source from VBAT. LED8 Output. Current source from VBAT. Interrupt Output. Open drain digital output for microcontroller unit, leave unconnected if not used. Digital Clock Input. Connect a 32kHz signal if this signal is not available, connect this pin to GND.
5 - 85

AS3661

Datasheet - Pinout

Table Pin Description for AS3661

Pin Number Pin Name

Ground

LED9 Output. Current source from VBAT.

General Purpose Output. Leave unconnected if not used.

TRIG Trigger Input. Open drain, connect to ground if not used.

Serial-Data I/O. Open drain digital I/O data pin.

Serial-Clock Input
6 - 85

AS3661

Datasheet - Absolute Maximum Ratings
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 Table Electrical Characteristics on page 8 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Table Absolute Maximum Ratings

Parameter

Min Max

VBAT, VCP, C1+, C1-, C2+, C2- to GND

VCP to VBAT

LED1, LED2....LED9 to GND

SDA, SCL, EN, CLK32K, TRIG, INT, GPO, ASEL0, ASEL1 to GND

Electrostatic Discharge

ESD HBM LED1 to LED2

ESD HBM all other pins

ESD MM

ESD CDM
Datasheet - Ordering Information
11 Ordering Information

The devices are available as the standard products shown in Table
Table Ordering Information
Ordering Code Marking

Desciption

Delivery Form

AS3661-BWLT AS3661 Programmable 9-channel LED Driver Tape and Reel

Package

WL-CSP-25 2.285x2.285mm
0.4mm pitch

Note All products are RoHS compliant and austriamicrosystems green. Buy our products or get free samples online at ICdirect:

Technical Support is found at

For further information and requests, please contact us or find your local distributor at
84 - 85

AS3661
Datasheet - Ordering Information

Copyrights

Copyright 1997-2012, 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.

Disclaimer

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. 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

Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit:
85 - 85

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS3661-BWLT-500 Datasheet file may be downloaded here without warranties.

Datasheet ID: AS3661-BWLT-500 519697