SCT2004S Datasheet Text
StarChips
Technology
SCT2004S V01_03; Jun/12
4-Channel Constant Current Driver
Product Description
The SCT2004S 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 200ns. The PWM control is performed by connecting the PWM signal from system control unit to OE pin of the SCT2004S. The full scale current value of each output is set by an external resistor connected to REXT pin.
The SCT2004S guarantees to endure maximum DC 24V at each output port. Each output of SCT2004S can sink a constant current up to 180mA. 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 SCT2004S 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 SCT2004S is equipped with over temperature protection. The four channels IC stops driving the output while junction temperature exceeds 160°C the high limit and the output will be reactivated while the junction temperature is below 110°C the low limit. In conclusion, the driver system is protected from damage of overheated.
Features
Four constant/current outputs rate at 24V Constant current range: 20
- 120/180mA@3.3/5V Excellent regulation to load, supply voltage and temperature Minimum PWM pulse width 200ns ±2%(typ) current matching between outputs ±4%(typ) current matching between ICs Dropout output 0.6V@80mA,VDD=5V All output current are adjusted through one external resistor Built/in thermal protection Supply voltage range 3.3 to 5V Dimming control with Schmitt triggered input...