TS19371

Boost (Step-up) WLED Driver with OVP

1/8

Version: F08

SOT-26

General Description

The TS19371 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The

device can drive up to 126 LEDs (9S14P) from a 12V supply. The output capacitor can be as small as 4.7µF, saving

space versus alternative solutions. A low 95mV feedback voltage minimizes power loss for better efficiency. Additional

feature include over output voltage limiting when LEDs are disconnected. The TS19371 switches at a fixed frequency

of 1.2MHz, allowing the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space

consideration applications for cellular phone backlighting or other hand held equipment.

Ordering Information

Part No.

Package

Packing

TS19371CX6 RF

SOT-26

3Kpcs / 7” Reel

Features

●

Inherently Matched LED Current

●

High Efficiency: 89% Typical

●

Drives Up to 9 LEDs Series @ Vin 9~15V

●

Drives Up to 126 LEDs (9S14P) @ Vin 12~15V

●

Drives Up to 6 (1W) LEDs Series @ Vin 12V

●

Over Output Voltage Protection 30V

●

Fast 1.2MHz Switching Frequency

●

Requires Only 4.7µF Output Capacitor

●

PWM dimming control 1KHz to 10KHz

●

Analog dimming control

Application

●

Cellular Phones

●

Portable Electronics Devices PDA, GPS

●

LCD Display Module

●

White LED Backlighting

Input Voltage vs. Efficiency

Typical Application Circuit

Pin Definition:

1. SW

6. Input

2. Ground

5. OVP

3. Feedback

4. CTRL