ADP1655 is a high efficiency dual LED flash driver that utilizes a 2MHz synchronous PWM boost converter, an integrated 2.2µH power inductor and features I2C programmable functionality.
The ADP1655 dual LED flash driver is designed for camera‑enabled mobile phones, digital cameras and camcorders. It integrates a 2 MHz synchronous boost converter, an I2C‑compatible control interface and a high‑efficiency LED current source, allowing up to 500 mA flash current for a single LED or 400 mA for two LEDs. The device is packaged in a 12‑ball 0.5 mm pitch WLCSP and operates from 2.7 V to 5.5 V input voltage.
The datasheet provides detailed specifications, pin descriptions, timing diagrams, safety features such as thermal shutdown at 150 °C and over‑voltage protection, as well as recommended external component values and PCB layout guidelines to ensure low EMI and reliable operation.
| Input Voltage Range | 2.7 V – 5.5 V |
|---|---|
| Input Logic Low Voltage | 0.54 V |
| Input Logic High Voltage | 1.26 V |
| Switching Frequency | 1.85 MHz – 2.15 MHz |
| Overvoltage Threshold | 9.0 V – 10.1 V |
The device operates from 2.7 V to 5.5 V input voltage.
It uses an I2C‑compatible interface that allows programming of timers, LED currents and reading status bits.