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 LP5521 LP5523 LP5562 LP5569
9    3    9    4    9   
25.5    25.5    25.5    25.5    25.5   
Parallel    Parallel    Parallel    Parallel    Parallel   
9    3    9    4    9   
Yes    Yes    Yes    Yes    Yes   
Yes    Yes    Yes    Yes    Yes   
2.7    2.7    2.7    2.7    2.5   
5.5    5.5    5.5    5.5    5.5   
2.7    2.7    2.7    2.7    2.5   
5.5    5.5    5.5    5.5    5.5   
0.0255    0.0765    0.225    0.11    0.23   
0.8    1.5    0.8    1    0.002   
0.2    0.2    0.2    0.2    0.2   
94    95    93    100    94   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Analog/PWM Mixed Dimming
Constant Current
Current Control
Direct PWM Dimming
I2C Control
Programmable Lighting Engines   
Catalog    Catalog    Catalog    Catalog    Catalog   
-30 to 85    -30 to 85    -30 to 85    -40 to 85    -40 to 85   
24WQFN    20DSBGA
24WQFN   
25DSBGA    12DSBGA    24WQFN