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

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

 

Recommended alternative parts

  • LP5569  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   LP5569 has the same functionality as LP55231

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

Parametrics

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Part number Order 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 (%) Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LP55231 Order now 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
Power Save Mode
Programmable Lighting Engines    
-30 to 85     WQFN | 24     24WQFN: 16 mm2: 4 x 4 (WQFN | 24)    
LP5521 Order now 3     25.5     Parallel     3     Yes     Yes     2.7     5.5     2.7     5.5     0.0765     1.5     0.2     95     Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Power Save Mode
Programmable Lighting Engines    
-30 to 85     DSBGA | 20
WQFN | 24    
See datasheet (DSBGA)
24WQFN: 20 mm2: 4 x 5 (WQFN | 24)    
LP5523 Order now 9     25.5     Parallel     9     Yes     Yes     2.7     5.5     2.7     5.5     0.225     0.8     0.2     93     Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Power Save Mode
Programmable Lighting Engines    
-30 to 85     DSBGA | 25     See datasheet (DSBGA)    
LP5562 Order now 4     25.5     Parallel     4     Yes     Yes     2.7     5.5     2.7     5.5     0.11     1     0.2     100     Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Power Save Mode
Programmable Lighting Engines    
-40 to 85     DSBGA | 12     See datasheet (DSBGA)    
LP5569 Order now 9     25.5     Parallel     9     Yes     Yes     2.5     5.5     2.5     5.5     0.23     0.002