AW3643CSR中文资料High Efficiency, Dual 1.5A Flash LED Driver数据手册Awinic规格书

描述 Description

The AW3643 is a dual LED flash driver thatprovides a high level of adjustability within a smallsolution size. The AW3643 utilizes a 2MHz or4MHz  fixed-frequency  synchronous  boostconverter to provide power to the dual 1.5Aconstant current LED sources. The dual 128 levelscurrent sources provide the flexibility to adjust thecurrent of LED1 and LED2 in Flash/Torch/IRmodes. The total allowed LED Current duringoperation is 1.5A (I LED1 +I LED2 ≤1.5A). The AW3643provides three IVFM protection modes to preventsystem reset or shutdown under low batterycondition.The AW3643 is controlled via an I 2 C-compatibleinterface. The main features of the AW3643include: flash/torch current, flash timeout duration,IVFM, TX interrupt, and NTC thermistor monitor.The AW3643 also provides hardware flash andhardware torch pins (STROBE and TORCH/TEMP)to control Flash/Torch events.The 2MHz or 4MHz switching frequency options,overvoltage protection (OVP), and adjustablecurrent limit allow for the use of tiny, low-profileinductors and 10-µF ceramic capacitors. Thedevice operates over a –40°C to +85°C ambienttemperature range.

特性 Features

• Support Dual Color Temperature Flash LED Application
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• High Efficiency: 85%
• Hardware Strobe Enable (STROBE)
• Remote NTC Monitoring
• 400kHz I2C：AW3643（I2C Address=0x63）
• 0.4mm Pitch，CSP-12 Package Compatible with AW3644, AW36413