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CST5020D
CST5020D is a driver IC used for LED display panel design. Its built-in CMOS shift buffer and latch function can convert serial input data into parallel output data format. The input voltage range of CST5020D is 3.3V~5V, providing 16 current sources that can provide a constant current of 3-36mA at each output stage to drive the LED; The current difference of the output channel in a single IC is less than ± 2% @ I OUT=23.8mA; ±2.5%@I OUT=3mA； The output current difference between multiple ICs is less than ± 3%; The current varies with the output withstand voltage (V DS) and is controlled at 0.1% per volt; According to the power supply voltage (VDD) and ambient temperature, the current is also controlled at 1%.
CST5020D Product Overview:
CST5020D is a driver IC used for LED display panel design. Its built-in CMOS shift buffer and latch function can convert serial input data into parallel output data format. The input voltage range of CST5020D is 3.3V~5V, providing 16 current sources that can provide a constant current of 3-36mA at each output stage to drive the LED; The current difference of the output channel in a single IC is less than ± 2% @ I OUT=23.8mA; ±2.5%@I OUT=3mA； The output current difference between multiple ICs is less than ± 3%; The current varies with the output withstand voltage (V DS) and is controlled at 0.1% per volt; According to the power supply voltage (VDD) and ambient temperature, the current is also controlled at 1%. Users can adjust the current of each output stage of CST5020D by selecting external resistors with different resistance values. Through this mechanism, users can accurately control the brightness of the LED.
CST5020D ensures an output stage withstand voltage of 11V, so multiple LEDs can be connected in series at each output terminal. In addition, CST5020D also provides a high clock rate input of 25 MHz to meet the high data transmission requirements of the system.
CST5020D Features:
*16 constant current output channels;
*The constant output value is not affected by the load voltage at the output. Constant current range value:
3.36mA@VDD =5V；
3.20mA@VDD =3.3V；
*Extremely precise current output:
Maximum difference between channels:<± 1.5% (general value)< ± 2.0% (maximum value)
Maximum difference between chips:<± 1.5% (general value)< ± 3.0% (maximum value)
*Fast output current control response: minimum pulse width=35ns (while maintaining output consistency);
*By using external resistors, the current output values of 16 drive ports can be set;
*Schmitt trigger input characteristics;
*High data rate, up to 25MHz;
*Operating voltage range: 3.3V to 5V;
*Very low standby current and operating current (i.e. VDD current);
*Integrated output channel overshoot suppression circuit
*Provide SSOP-24 packaging (wide body: e=1.0mm; narrow body: e=0.635mm)
*Used for LED display screens, variable signs, and LED traffic signal indicators;
*The constant output value is not affected by the load voltage at the output. Constant current range value:
3.36mA@VDD =5V；
3.20mA@VDD =3.3V；
*Extremely precise current output:
Maximum difference between channels:<± 1.5% (general value)< ± 2.0% (maximum value)
Maximum difference between chips:<± 1.5% (general value)< ± 3.0% (maximum value)
*Fast output current control response: minimum pulse width=35ns (while maintaining output consistency);
*By using external resistors, the current output values of 16 drive ports can be set;
*Schmitt trigger input characteristics;
*High data rate, up to 25MHz;
*Operating voltage range: 3.3V to 5V;
*Very low standby current and operating current (i.e. VDD current);
*Integrated output channel overshoot suppression circuit
*Provide SSOP-24 packaging (wide body: e=1.0mm; narrow body: e=0.635mm)
*Used for LED display screens, variable signs, and LED traffic signal indicators;
CST5020D pin mapping and pin description:
CST5020D functional block diagram:
CST5020D Input and Output Equivalent Circuit
CST5020D dynamic characteristic testing circuit:
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