LM27952SD/NOPB by Texas Instruments | APACLED Drivers | Avnet ASIA

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LM27952SD/NOPB

Texas Instruments

LED DRVR 4Segment 3.3V/5V 14-Pin LLP EP T/R

製造商產品編號: LM27952SD/NOPB

替代料號: LM27952SD/NOPB


legend 通過RoHS認證

描述

文檔

替代/替換

資料

The LM27952 is a switched capacitor white-LED driver capable of driving up to 4 LEDs with 30mA through each LED. Its 4 tightly regulated current sinks ensure excellent LED current and brightness matching. LED drive current is programmed by an external sense resistor. The LM27952 operates over an input voltage range from 3.0V to 5.5V and requires only four low-cost ceramic capacitors.

The LM27952 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2, or in a gain of 1. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage requirements.

The LM27952 uses constant frequency pre-regulation to minimize conducted noise on the input. It has a fixed 750kHz switching frequency optimized for portable applications. The LM27952 consumes less than 1µA of supply current when shut down.

The LM27952 is available in a 14-pin No-Pullback Leadless Leadframe Package: WSON-14.

 

技術參數

  • Drives up to 4 LEDs with up to 30mA each
  • Regulated current sources with 0.2%(typ.) matching
  • 3/2x, 1x Gain transition based on LED VF
  • Peak Efficiency Over 85%
  • Input Voltage Range: 3.0V to 5.5V
  • PWM Brightness Control
  • Very Small Solution Size - NO INDUCTOR
  • Fixed 750kHz Switching Frequency
  • <1µA Shutdown Current
  • 14-pin WSON Package: 4.0mm X 3.0mm X 0.8mm
  • 技術屬性

    描述
    尋找類似物料
    Product Dimensions
    4 x 3 x 0.8 mm
    Pin Count
    14
    Supplier Package
    LLP EP
    MSL Level
    1
    Max Processing Temp
    260
    Lead Finish
    Tin

    ECCN/UNSPSC

    描述
    ECCN:
    EAR99
    計劃交貨期 B:
    8542390000"

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