AS3649 Description
The AS3649 is an inductive high efficient DCDC step up converter with two current sources. The DCDC step up converter operates at a fixed frequency of 4MHz and includes soft startup to allow easy integration into noise sensitive RF systems. The two current sources can operate in flash / torch or video light modes.
AS3649 Key Features
- High efficiency 4MHz fixed frequency DCDC Boost converter with soft start allows small coils
- Stable even in coil current limit
- LED current adjustable up to 2x1000mA(2x1250mA with current boost) or 2000mA and automatic load balancing for two LEDs
- Automatic current adjustment for low battery voltage
- PWM operation for lower output current for reliable light output of the LED; can run at 31.5kHz to avoid audible noise
- Protection functions: Automatic Flash Timeout timer to protect the LED(s) Overvoltage and undervoltage Protection Overt
- ADC to measure LED temperature
- NTC to automatically reduce the flash current if the LED temperature is too high (programmable level)
- I2C Interface with hardware reset pin
- Available in tiny WL-CSP Package, 16 balls 0.5mm pitch, 2.06x2.02x0.6mm package size