FAN5702UMP20X

The FAN5702UMP20X from On Semiconductor is a highly integrated, charge-pump-based multi-LED driver designed for applications like LCD backlighting in mobile handsets and portable media players. This device can drive up to six LEDs in parallel, providing a total output current capability of 180 mA, with individual current sinks delivering excellent matching.

Featuring an I2C interface, the FAN5702UMP20X allows for independent brightness control across up to five channels, with a default grouping of 2,1,1,1,1. It also offers secondary dimming control via a PWM signal on the EN/PWM pin, enabling dynamic backlight control to reduce current consumption. The driver operates efficiently using a 1.5x or pass-through charge pump mode, eliminating the need for an inductor and supporting a 1.2 MHz switching frequency for small capacitor sizes.

Key electrical specifications include a nominal input voltage of 2.7V, individual LED current up to 30 mA, and a total package load current of 180 mA. It supports both I2C and PWM dimming with a dimming ratio greater than 600:1 at 100 Hz PWM frequency and features logarithmic dimming with 64 steps. The device achieves up to 92% efficiency.

The FAN5702UMP20X is available in a compact 16-UMLP (3x3) package and a 16-UFQFN exposed pad package, both suitable for surface mounting. It operates within a temperature range of -40°C to 85°C.