TS19371_10 Datasheet, PDF (1/10 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. VIN
2. GND 5. OVP
3. FB
4. CTRL
SOP-8
Pin Definition:
1. VIN
8. SW
2. GND
7. GND
3. GND
6. GND
4. CTRL 5. FB
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 (SOT-26 package) 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 (SOT-26)
● 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
TS19371CS RL
Package
SOT-26
SOP-8
Packing
3Kpcs / 7” Reel
2.5Kpcs / 13” Reel
Input Voltage vs. Efficiency
Application
● Cellular Phones
● Portable Electronics Devices PDA, GPS
● LCD Display Module
● White LED Backlighting
● MR-16 lighting
Typical Application Circuit
1/10
Version: G08