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AW3643CSR Datasheet(PDF) 1 Page - Shanghai awinic technology co.,ltd |
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AW3643CSR Datasheet(HTML) 1 Page - Shanghai awinic technology co.,ltd |
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1 / 39 page  AW3643 Jan 2018 V1.4 www.awinic.com.cn 1 Copyright © 2016 SHANGHAI AWINIC TECHNOLOGY CO., LTD High Efficiency, Dual 1.5A Flash LED Driver FEATURES Support Dual Color Temperature Flash LED Application 1.5A Total Allowed LED Current During Operation (ILED1+ILED2≤1.5A) Flash：11.35mA~1.5A，128 levels 11.72mA/level Torch：2.55mA~372mA，128 levels 2.91mA/level Flash Timeout：40ms~1.6s，16 levels Flash/Torch/IR Mode High Efficiency: 85% Optimized Flash LED Current During Low Battery Conditions (IVFM) Hardware Strobe Enable (STROBE) Hardware Torch Enable (TORCH/TEMP) Remote NTC Monitoring Synchronization Input for RF Power Amplifier Pulse Events (TX) 400kHz I2C：AW3643（I2C Address=0x63） 0.4mm Pitch，CSP-12 Package Compatible with AW3644, AW36413, AW36414 APPLICATION Smartphone Camera Flash GENERAL DESCRIPTION The AW3643 is a dual LED flash driver that provides a high level of adjustability within a small solution size. The AW3643 utilizes a 2MHz or 4MHz fixed-frequency synchronous boost converter to provide power to the dual 1.5A constant current LED sources. The dual 128 levels current sources provide the flexibility to adjust the current of LED1 and LED2 in Flash/Torch/IR modes. The total allowed LED Current during operation is 1.5A (ILED1+ILED2≤1.5A). The AW3643 provides three IVFM protection modes to prevent system reset or shutdown under low battery condition. The AW3643 is controlled via an I2C-compatible interface. The main features of the AW3643 include: flash/torch current, flash timeout duration, IVFM, TX interrupt, and NTC thermistor monitor. The AW3643 also provides hardware flash and hardware torch pins (STROBE and TORCH/TEMP) to control Flash/Torch events. The 2MHz or 4MHz switching frequency options, overvoltage protection (OVP), and adjustable current limit allow for the use of tiny, low-profile inductors and 10-µF ceramic capacitors. The device operates over a –40°C to +85°C ambient temperature range. The AW3643 is available in small 0.4mm pitch 1.626mm×1.332mm CSP-12 package. TYPICAL APPLICATION CIRCUIT TORCH/TEMP SW LED1 IN VIN CIN 10μF 10V COUT 10μF 10V L 1μH 3A Flash LED AW3643CSR STROBE GND OUT LED2 D1 HWEN TX SDA SCL Flash LED D2 MCU Fig 1 Typical Application Circuit of AW3643 All trademarks are the property of their respective owners. |
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