LM27951SD - Texas Instruments

Manufacturer Part Number

LM27951SD

Manufacturer

Texas Instruments

Introduction

The LM27951SD is a power management integrated circuit (PMIC) designed for LED driving applications, specifically optimized for backlighting solutions.

Product Features and Performance

Integrated switch mode charge pump regulator

Efficient power conversion

4 output channels for multiple LED driving

Supports PWM dimming for brightness control

High-frequency operation at 750kHz minimizes external components

Wide input voltage range from 2.8V to 5.5V

Adjustable output voltage from 2.5V to 3.9V

Up to 30mA current output per channel

Product Advantages

High efficiency due to switched capacitor topology

Compact solution for LED backlighting

Allows for small form factor designs

Low electromagnetic interference (EMI)

Key Technical Parameters

Topology: Switched Capacitor (Charge Pump)

Internal Switch(s): Yes

Number of Outputs: 4

Voltage - Supply (Min): 2.8V

Voltage - Supply (Max): 5.5V

Voltage - Output: 2.5V ~ 3.9V

Current - Output / Channel: 30mA

Frequency: 750kHz

Dimming: PWM

Quality and Safety Features

Built-in over-temperature protection

Under-voltage lockout (UVLO)

Compatibility

Designed to be used with a range of LEDs for backlight applications

Surface mount technology for easy integration into system designs

Application Areas

Backlighting for portable devices

LCD display illumination

Keypad backlighting for mobile devices

Product Lifecycle

Product Status: Not For New Designs

Potential near-end-of-life with a focus on existing designs rather than new applications

Replacements or upgrades may be available from Texas Instruments

Several Key Reasons to Choose This Product

Efficient power management for LED backlighting

Supports wide input voltage suitable for battery-powered devices

Multiphase charge pump for reduced input ripple and improved stability

Low power consumption enhances battery life

Flexible dimming options to adjust brightness levels

Robust thermal management features ensure reliable operation in various environments

Ease of integration with compact package and surface mount design