SCT2004 Datasheet Text
StarChips
Technology
SCT2004 V02_02; Nov/11
4-Channel High Constant Current Driver
Product Description
The SCT2004 is a four channels constant current driver best for LED lighting. It provides the PWM control effect by sinking constant current from LED clusters with minimum pulse width 80ns. The PWM control is performed by connecting the PWM signal from system control unit to OE pin of the SCT2004. The full scale current value of each output is set by an external resistor connected to REXT pin.
The SCT2004 guarantees to endure maximum DC 24V at each output port. Each output of SCT2004 can sink a constant current up to 320mA. Users can simply shunt the outputs to get higher current driver/ability, especially in the case of high power LED lighting.
The excellent current regulation capability allows SCT2004 easily drive each output current to a constant stable output nearly without affected by power supply of LED, loading due to variant VF of LEDs and operating temperature. The SCT2004 is equipped with negative temperature coefficient characteristics, thus the driver system and LEDs are protected from damage of thermal runaway or overheated.
Features
Four constant/current outputs rate at 24V Constant current range: 20
- 320mA Excellent regulation to load, supply voltage and temperature Minimum PWM pulse width 80ns ±2%(typ) current matching between outputs ±4%(typ) current matching between ICs Dropout output 0.4V@80mA,VDD=5V All output current are adjusted through one external resistor Built/in power on reset and thermal protection Supply voltage range 4 to 5V Dimming control with Schmitt triggered input Package: SOP8 with heat sink pad Application: LED backlight, LED lighting, LED lamp
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4-Channel High Constant Current Driver Pin Configuration
GND 1...