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LP55231SQX/NOPB

Texas Instruments

LED DRVR Boost 9-CH PWM 5.5V 0.0255A 24-Pin WQFN T/R

Manufacturer Part #: LP55231SQX/NOPB

Alternate Part #: LP55231SQX/NOPB


legend RoHS Compliant

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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 (typ). Only four small and low-cost ceramic capacitors are required.

Key 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 Overcurrent/
    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
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Mounting
    Surface Mount
    Lead Finish
    Tin
    DC Input Voltage (Typ)
    3.6 V
    Output Voltage (Max)
    5.5 V
    Topology
    Boost
    DC Input Voltage (Min)
    2.7 V
    Output Voltage (Min)
    3.6 V
    Max Processing Temp
    260
    Switching Frequency (Typ)
    1250 kHz
    DC Input Voltage (Max)
    5.5 V
    Type
    Switching
    Output Type
    Constant Current
    Number of Channels
    9
    Operating Temperature
    -30 to 85 °C
    Dimming Method
    PWM
    Maximum Output Current
    0.0255 A
    Input Voltage Type
    DC/DC

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8542390000
    HTSN:
    8542390000
    UNSPSC:
    32101600
    UNSPSC VERSION:
    V15.1101

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    USD    $1.0714

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