AWINIC(Shanghai Awinic Tech) AW36428FCR

The AW36428 is a inductorless single channel 1.5A Flash LED driver that provides a high level of adjustability within a ultra-small solution size. The AW36428 can produce up to 1.5 A of LED flash current or up to 375 mA of torch current. The AW36428 provides IVFM protection mode to prevent system reset or shutdown under low battery condition. The AW36428 is controlled via an I²C-compatible interface. The main features of the AW36428 include: flash / torch / IR current, flash timeout duration and IVFM. The AW36428 also provides hardware flash pin (STROBE) to control flash event. The device operates over a -40°C to +85°C ambient temperature range. The AW36428 is available in small 0.4mm pitch 1.6mm×1.2mm FCQFN-10L package. The AW36428 is a high-power LED flash driver capable of delivering up to 1.5A to the LED over the 2.7V to 5.5V input voltage range. The device has one logic input for a hardware flash enable(STROBE). This logic input has an internal 300kΩ(typical) pull-down resistor to GND. The device is controlled via an I²C-compatible interface which includes adjustment of the Flash and Torch current levels, changing the Flash Timeout Duration and IVFM level. Additionally, there are flag and status bits that indicate flash current timeout, LED over-temperature condition, LED failure (short), device thermal shutdown, and VIN under-voltage conditions. In Flash Mode, the LED current source provide 256 target current levels from 5.86mA to 1.5A. The Flash currents are adjusted via the LED Flash Brightness Register. Flash mode is activated by the Enable Register(setting M1, M0 to '11'), or by pulling the STROBE pin HIGH when the pin is enabled (Enable Register). Once the Flash sequence is activated, the current source LED ramp up to the programmed Flash current by stepping through all current steps until the programmed current is reached. When the device is enabled in Flash Mode through the Enable Register, all mode bits in the Enable Register are cleared after a flash timeout event. In Torch mode, the LED current source provide 256 target current levels from 1.46mA to 375mA. The Torch currents are adjusted via the LED Torch Brightness Register. Torch mode is activated by the Enable Register (setting M1, M0 to '10'). Once the TORCH sequence is activated, the active current source ramp up to the programmed Torch current by stepping through all current steps until the programmed current is reached.

• 1.5A Accurate and Programmable LED Current Source
  • Flash：5.86mA~1.5A，256 levels，5.86mA/level
  • Torch：1.46mA~375mA，256 levels，1.46mA/level
• V Flash Timeout：40ms~1.6s，16 levels
• Optimized Flash LED Current During Low Battery Conditions (IVFM)
• Grounded Cathode LED Operation for Improved Thermal Management
• Small Total Solution Size: <4mm²
• Hardware Strobe Enable (STROBE)
• Input Voltage Range from 2.7V to 5.5V
• 400kHz I²C：AW36428（I²C Address = 0x63）
• 0.4mm Pitch，FCQFN-10L Package

• Smartphone Camera Flash