SGM3133 datasheet, PDF - EEWORLD Datasheet

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SGM3133: Description4-Channel Charge Pump White LED Driver with Low Dropout Current Source Charge Pump LED Driver; CategoryLED optoelectronic/LED; File Size323KB，13 Pages; ManufacturerSG Micro Corp(SGMICRO); Websitehttp://www.sg-micro.com/; Shengbang Microelectronics is a semiconductor company that focuses on the research and development and sales of high-performance, high-quality analog integrated circuits. Shengbang Microelectronics products have excellent performance and quality and can be widely used in many fields such as mobile phones, TVs, DVDs, digital cameras, laptops, consumer electronics, automotive electronics, industrial automation control, medical instruments, LCD displays, etc.

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SGM3133 Overview

4-Channel Charge Pump White LED Driver with Low Dropout Current Source Charge Pump LED Driver

Features

Product Name: 4-Channel Charge Pump White LED Driver with Low Dropout Current Source Charge Pump LED Driver

Product model: SGM3133

Product Description:

The SGM3133 is a high efficiency and cost effective charge pump white LED driver. It supports up to 4 white LEDs and regulates a constant current for uniform intensity. The part maintains the high efficiency by utilizing a 1×/1.5× fractional charge pump and low dropout current sources. The small equivalent 1× mode open loop resistance and ultra-low dropout voltage of current source extend the operating time of 1× mode and optimize the efficiency of Li-ion battery in white LED applications.

User can easily configure each LED current from 1.25mA to 20mA by a pulse dimming control. The dimming of white LEDs current can be achieved by applying a pulse signal to the EN/SET pin. There are totally 16 steps of current could be set by users. The operating voltage range is 2.7V to 5.5V. Internal soft start circuitry effectively reduces the in-rush current while both start-up and mode transition.

The SGM3133 is available in Green TQFN-3×3-16L package and is specified over an ambient temperature range of-40℃ to +85℃.

Product Features:

Input Voltage Range: 2.7V to 5.5V

Drives up to 4 LEDs at 20mA Each

16-Step Brightness Control

High Efficiency by Fractional Conversion with 1× and 1.5× Modes

Automatic Charge Pump Mode Selection

Switching Frequency: 1MHz

1% Typical LED Current Matching

Internal Soft-start Limits Inrush Current

Low Input Noise and Low EMI

Over Current and Over Temperature Protection

Output Over Voltage Protection

Under Voltage Lockout with Hysteresis

Available in Green TQFN-3×3-16L Package

Application areas:

Mobile Phone, DSC, MP3

White LED Backlighting

LCD Display Supply

Product indicators:

LED connection method: Common Cathode

Number of LED driving channels: 4

1/1.5/2x working mode: 1×/1.5×

Quiescent current (μA): 300

Shutdown current (μA): < 10

Dimming method: One-Wire

Current matching: < ±3%

Package type: TQFN-3×3-16L

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