Programmable LED Driver - LP5523

LP5523 (ACTIVE)

Programmable LED Driver

Description

The LP5523 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 LP5523 maintains excellent efficiency over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. LP5523 is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA (typ).

The LP5523 has an I2C-compatible control interface with four pin selectable addresses. The device has a flexible General Purpose Output (GPO), which can be used as a digital control pin for other devices. 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 LP5523 devices.

The device requires only four small and low-cost ceramic capacitors. The LP5523 is available in a tiny 25-bump 2.27 mm x 2.27 mm x 0.60 mm DSBGA package (0.4 mm pitch).

Features

  • Three Independent Program Execution Engines, 9 Programmable Outputs with 25.5 mA Full-Scale Current, 8-Bit Current Setting Resolution and 12-Bit PWM Control Resolution
  • Adaptive High-Efficiency 1x/1.5x Fractional Charge Pump - Efficiency Up to 94%
  • LED Drive Efficiency Up to 93%
  • Charge Pump with Soft Start and Over-Current/Short-Circuit Protection
  • Built-in LED Test
  • 200 nA Typical Standby Current
  • Automatic Power Save Mode; IVDD = 10 µA (typ.)
  • Two-Wire I2C-Compatible Control Interface
  • Flexible Instruction Set
  • Large SRAM Program Memory
  • Small Application Circuit
  • Source (High-Side) Drivers
  • Architecture Supports Color Control

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Rating
Pin/Package
Approx. Price (US$)
LP5523
Catalog    
25DSBGA    
0.85 | 1ku    

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