TJ9910A中文资料UNIVERSAL HIGH BRIGHTNESS LED DRIVER数据手册HTC Korea规格书

描述 Description

The TJ9910A is a PWM high-efficiency LED driver control IC.
It allows efficient operation of high-brightness (HB) LEDs from voltage sources ranging from 10VDC up to 600VDC.
TJ9910A controls an external MOSFET at fixed switching frequencies up to 300 kHz. The frequency can be programmed using a single resistor.
The LED string is driven at a constant current rather than a constant voltage, thus providing a constant lightoutput and an enhanced reliability. The output current can be programmed between a few milliamps and upto more than 1.0A. TJ9910A uses a rugged high-voltage junction isolated process that can withstand an inputvoltage surge up to 600V. The output current to a LED string can be programmed to any value between zeroand its maximum value by applying an external control voltage at the linear dimming control input of TJ9910A.TJ9910A provides a low-frequency PWM dimming input that can accept an external control signal with a dutyratio of 0~100% and a frequency of up to a few kHz.

特性 Features

- Over 90% Efficiency
- 10V to 600V Input Range
- Constant Current LED Driver
- Applications from a few mA to more than 1A output
- LED String From One to Hundreds of Diodes
- Linear and PWM Dimming Capability
- Input Voltage Surge Ratings up to 600V
- Moisture Sensitivity Level 3