TS19370 Datasheet, PDF (1/8 Pages) Taiwan Semiconductor Company, Ltd – Boost (Step-up) WLED Driver with OVP

SOT-26
Pin Definition:
1. SW
6. Input
2. Ground 5. OVP
3. Feedback 4. CTRL
TS19370
Boost (Step-up) WLED Driver with OVP
General Description
The TS19370 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The
device can drive 2 ~ 9 LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED
currents resulting in uniform brightness and eliminating the need for ballast resistors. The output capacitor can be as
small as 0.22µF, 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 TS19370 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: 88% Typical
● Drives Up to 6 LEDs @ Vin 5V
● Drives Up to 9 LEDs @ Vin 9~15V
● Over Output Voltage Protection 30V
● Fast 1.2MHz Switching Frequency
● Requires Only 0.22µF Output Capacitor
● PWM dimming control 1KHz to 10KHz
● Analog dimming control
Ordering Information
Part No.
Package
TS19370CX6 RF 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: D08