9 Channel RGB / White LED Driver with Internal Program Memory and Integrated Charge Pump - WQFN - LP55231

LP55231 (ACTIVE)

9 Channel RGB / White LED Driver with Internal Program Memory and Integrated Charge Pump - WQFN

 

Description

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.

For all available packages, see the orderable addendum at the end of the data sheet.

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 1×/1.5× Fractional Charge Pump - Efficiency up to 94%
  • LED Drive Efficiency Up to 93%
  • Charge Pump With Soft Start
  • Overcurrent and Short-Circuit Protection
  • Built-in LED Test
  • 200-nA Typical Standby Current
  • Automatic Power Save Mode; IVDD = 10 µA (Typical)
  • 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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Parametrics Compare all products in RGB & White LED Driver

 
Channels (#)
LED Current Per Channel (mA)
LED Configuration
LED (#)
Program Memory
Programmable Ramp Control
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Iq (Typ) (mA)
Shutdown Current (Typ) (uA)
Peak Efficiency (%)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
LP55231
9   
25.5   
Parallel   
9   
Yes   
Yes   
2.7   
5.5   
2.7   
5.5   
0.0255   
0.8   
0.2   
94   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Catalog   
-30 to 85   
24WQFN