XRP7620 is a multi purpose 4-channel independently adjustable current sink driver from Exar company. It supports I2C interface and can realize independent control of each channel and 0.5mA step programming for uniform display brightness. XRP7620 can be applied in LED backlighting, RGBW/RGBA color mixing, cell phones and handheld devices.
The XRP7620 is a 4‑channel, independently adjustable current sink driver designed for LED backlighting, RGBW/RGBA color mixing, and generic I/O expansion. It operates from 2.7 V to 5.5 V and can source up to 31.5 mA per channel with 0.5 mA steps.
Control is provided via a standard 2‑wire I²C interface, with five internal registers for configuration, current setting, and shutdown retention. The device is supplied in a RoHS‑compliant 8‑pin DFN package and includes built‑in thermal and UVLO protection.
| Operating Input Voltage Range | 2.7 V – 5.5 V |
|---|---|
| Maximum LED Current per Channel | 31.5 mA (typical 31.75 mA max) |
| Current DAC Resolution | 6 Bit |
| Shutdown Supply Current | 0.01 µA – 5 µA |
| Thermal Shutdown Temperature | 125 °C – 175 °C |
| Package Type | 8‑pin DFN (2 mm × 3 mm) |
The device operates from 2.7 V to 5.5 V.
Each channel can be programmed up to about 31.5 mA (typical max 31.75 mA).
The current DAC has a 6‑bit resolution.