The ADP8861 Rev. B is a charge pump with automatic gain selection of 1×, 1.5×, and 2× for maximum efficiency, and can drive up to 7 LEDs independently with a maximum current of 30 mA (typical) for each channel.
The ADP8861 is a 7‑channel smart LED driver that provides independent control of up to seven LEDs. Each channel can be programmed for current limit and fade‑in/out timing, with selectable charge‑pump gains of 1×, 1.5×, or 2× for high efficiency. The device includes standby mode with sub‑µA quiescent current, soft‑start, and input‑to‑output isolation during faults.
Typical applications include mobile display and keypad backlighting, dual‑RGB backlighting, LED indication, and general backlighting of small‑format displays. The part is offered in a 20‑ball WLCSP package (2.15 mm × 2.36 mm × 0.6 mm) or a 20‑lead LFCSP package (4 mm × 4 mm × 0.75 mm).
| Supply Input Voltage Range | 2.5 V – 5.5 V |
|---|---|
| Number of Independent LED Drivers | 7 |
| Maximum LED Drive Current per Channel | 30 mA typical (one channel up to 60 mA) |
| Charge‑Pump Gain Options | 1×, 1.5×, 2× |
| Standby Quiescent Current | < 1 µA |
| Switching Frequency | 0.8 – 1.32 MHz |
| Operating Temperature Range (Ambient) | -40 °C – +85 °C |
| Maximum Junction Temperature | 125 °C |
| Package Options | 20‑ball WLCSP (2.15 mm × 2.36 mm × 0.6 mm) or 20‑lead LFCSP (4 mm × 4 mm × 0.75 mm) |
The ADP8861 provides seven independent LED drivers, each of which can be programmed separately.
Each channel can drive up to 30 mA typical, and one channel can be set to 60 mA typical.
The device automatically selects a charge‑pump gain of 1×, 1.5×, or 2× for optimal efficiency.
It includes short‑circuit, over‑voltage, over‑temperature protection, a soft‑start circuit, and input‑to‑output isolation during faults.