SNOSCR5D March 2013 – December 2016 LP55231
The LP55231 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control.
The LP55231 has an I2C-compatible control interface with four pin-selectable addresses. The INT pin can be used to notify processor when a lighting sequence has ended (interrupt function). Also, the device has a trigger input interface, which allows synchronization, for example, between multiple LP55231 devices. Excellent efficiency is maintained over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. The device is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA (typical). Only four small and low-cost ceramic capacitors are required.
|PART NUMBER||PACKAGE||BODY SIZE (NOM)|
|LP55231||WQFN (24)||4.00 mm × 4.00 mm|
Changes from C Revision (November 2016) to D Revision
Changes from B Revision (May 2016) to C Revision
Changes from A Revision (October 2014) to B Revision
Changes from * Revision (March 2013) to A Revision