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.

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

Application

● Cellular Phones

● Portable Electronics Devices PDA, GPS

● LCD Display Module

● White LED Backlighting

● MR-16 lighting