ADP1655 is a dual LED flash driver with I2C-compatible interface. The device adopts a small 2mm × 1.5mm WLCSP package, built-in 2.2μH power inductor, has LED current source, synchronous PWM boost converter, high efficiency and other features.
The ADP1655 is a dual white‑LED flash driver designed for high‑resolution camera phones, digital cameras and camcorders. It integrates a 2 MHz synchronous boost converter, an I²C‑compatible control interface and a programmable current source, enabling low‑profile layouts, reduced EMI and high efficiency (up to 88 %). The device operates from 2.7 V to 5.5 V and includes safety features such as thermal shutdown, over‑voltage protection and short‑circuit detection.
The datasheet provides detailed specifications, pin descriptions, timing diagrams, recommended external components, PCB layout guidelines and ordering information. Typical performance graphs illustrate current versus input voltage for one‑ and two‑LED configurations, and the package is supplied in a 12‑ball wafer‑level chip‑scale (WLCSP) format.
| Maximum Flash LED Current (one LED) | 500 mA |
|---|---|
| Switching Frequency | 1.85 – 2.15 MHz |
| Thermal Shutdown Threshold (rising) | 150 °C |
In flash mode with one LED, the driver can source up to 500 mA.
The driver uses an I²C‑compatible interface that allows programming of timers, currents and status‑bit readback.