ADP8870 is a backlight driver produced by Analog Devices, which has image content PWM input function and can realize automatic ambient light sensing (ALS) and content adaptive brightness control (CABC). The driver has 7 independent programmable LED drivers and supports 128 level maximum current limit.
The ADP8870 combines a programmable charge‑pump LED driver with automatic phototransistor ambient‑light sensing and a PWM input for content‑adaptive brightness control. It offers up to seven independent LED drivers, programmable current limits, and fade‑in/out timing, enabling significant power savings for mobile displays and keypads.
The device operates from 2.5 V to 5.5 V, includes gain selection of 1×, 1.5×, and 2×, and provides built‑in protections such as short‑circuit, over‑voltage, over‑temperature, soft‑start, and input‑to‑output isolation. Package options include a 2.15 mm × 2.36 mm × 0.6 mm WLCSP and a 4 mm × 4 mm × 0.75 mm LFCSP.
| Package (WLCSP) | 2.15 mm × 2.36 mm × 0.6 mm |
|---|---|
| Package (LFCSP) | 4 mm × 4 mm × 0.75 mm |
| Number of LED drivers | 7 independent drivers |
| LED driver current limits | 6 drivers up to 30 mA, 1 driver up to 60 mA |
| Input voltage range | 2.5 V to 5.5 V |
| Undervoltage lockout | 2.0 V |
| Gain selection | 1×, 1.5×, 2× |
| Programmable fade‑in/out time | 0.1 s to 5.5 s (16 levels) |
| Standby current | <1 µA |
The ADP8870 operates from 2.5 V up to 5.5 V, with an undervoltage lockout set at 2.0 V.
It provides seven independent LED drivers; six can supply up to 30 mA each and one can supply up to 60 mA.
The device includes short‑circuit, over‑voltage, over‑temperature protection, an internal soft‑start, and input‑to‑output isolation during faults or shutdown.
Yes, a PWM input can be used to scale LED output current and for content‑adaptive brightness control.