TS19371 Datasheet, PDF (1/8 Pages) Taiwan Semiconductor Company, Ltd – Boost (Step-up) WLED Driver with OVP

TS19371
Boost (Step-up) WLED Driver with OVP
SOT-26
Pin Definition:
1. SW
6. Input
2. Ground 5. OVP
3. Feedback 4. CTRL
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.
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
Ordering Information
Part No.
TS19371CX6 RF
Package
SOT-26
Packing
3Kpcs / 7” Reel
Input Voltage vs. Efficiency
Application
● Cellular Phones
● Portable Electronics Devices PDA, GPS
● LCD Display Module
● White LED Backlighting
Typical Application Circuit
1/8
Version: F08