T8309AD

tm TE CH Preliminary T8309AD PWM Control 1500mA Step-Down Converter Built-sensitive switch hysteresis control function FEATURES Wide Input Voltage Range: 4.5V to 30V LED Output Current Up to 1500mA Soft-start Single pin on/off and brightness control using DC voltage or PWM High efficiency (up to 97%) CCTV IR LED Driver add CDS control Built-sensitive switch hysteresis control function Up to 1MHz switching frequency Typical 5% output current accuracy SOP-8 Lead-free Package Applications LED/Display Back Light Driver Lightings Portable Communication Devices Handheld Electronics CCTV IR LED Driver GENERAL DESCRIPTION The T8309AD is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 4.5V and 30V and provides an externally adjustable output current of up to 1500mA. Depending upon supply voltage and external components, this can provide up to 24 watts of output power. The T8309AD includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. The T8309AD is available in SOP-8 Lead-free package. PART NUMBER EXAMPLES PART NO. T8309AD PACKAGE SOP-8 TM Technology, Inc. reserves the right P. 1 to change products or specifications without notice. Publication Date: Sep. 2014 Revision:C tm TE CH PIN...