CSC7203

CSC7203 HIGH PERFORMANCE OFF-LINE PWM SWITCHING POWER CONVERTER  PRODUCT DESCRIPTION The CSC7203 is a high performance current mode Pulse Width Modulated (PWM) switching power converter, which meets the Green Environmental standards. It is widely used in economical switching power supply, such as Set-top Box, DVD, printer and LCD display, etc. No-load Power Consumption < 0.3W and When VIN = 220VAC, Power Consumption < 0.2W PIN CONFIGURATION DIP8       8 Pulse-by-Pulse Current Limit Detected Built-in Ramp Drive Circuit Built-in Current Limit Resistor with Temperature Compensation Built-in Over Temperature, Over Current, Over Voltage and Over Load Protection OC 7 2 NC OC 6 3 VCC GND NC 5  Built-in 700V High Power BJT Full Input Voltage Range: 85VAC ~ 265VAC Current Mode PWM Control 4   1 FEATURES NC FB APPLICATIONS  Built-in Self-Powered Without Auxiliary Winding Internal Integrated Start-up Resistance, Few Peripheral Devices   Intelligent mobile phone and small size table computer power supplies DVD and Set-top boxes power supplies Power adapters PIN FUNCTION DESCRIPTION PIN# Name Function Description PIN# Name Function Description 1 NC NC 5 FB Feedback 2 VCC Power Supply 6 NC NC 3 GND Ground 7 OC 4 NC NC 8 The collector of internal power BJT Version：2.0 April-2017 Page 1 http://www.cschip.com CSC7203 FUNCTIONAL BLOCK DIAGRAM VCC 2 Startup Frequency Jitter Oscillation Fault Protection R Q S Q Driver Power Management + Power Abnormally FB 5 VREF - Frequency Conversion Control 7 OC 8 OC 1 NC 4 NC 6 NC 3 GND RCS Optical Couple Failure Peak Over Current Protect Figure.1 Functional block diagram of CSC7203 R2 R2 R1 R1 Current Limit + Current Limit Version：2.0 April-2017 Page 2 http://www.cschip.com Err Amp. - Bandgap Reference Voltage CSC7203 ABSOLUTE MAXIMUM RATINGS Name Symbol Range Unit VCC Supply Voltage VCC 8 V Terminal Input Voltage VPIN VCC + 0.3 V OC Pin Collector Voltage VOC -0.3 ~ +700 V Peak Switching Transistor Current IC(pk) 0.8 A Allowable Power Dissipation PD 1000 mW Junction Operating Ambient Temperature TJ 0 ~ +125 °C Storage Temperature Range Tstg -55 ~ +150 °C Soldering Temperature (10 Seconds) Tsolder +260 °C 2 KV ESD(Human Body Model) Notes：(1)Instant maximum ratings specified will not cause permanent damage to the product,while long maximum ratings specified applied will do and may affect product reliability. (2)Without special descriptions，all voltages referred to IC GND(TA=25℃)。 RECOMMENDED OPERATING CONDITIONS （TA = 25°C, unless otherwise specified.） Symbol Parameter Min Typ Max Unit 4 5 6 V 5 5.2 V VCC Supply Voltage VSIN Start-up Input Voltage 4.8 VPIN Input Pin Voltage -0.3 VCC V Topr Operating Ambient Temperature Range 0 70 °C ELECTRICAL CHARACTERISTICS（Without special descriptions ,VCC=5V,TA=25℃） Symbol Parameter Conditions Min Typ Max Unit Output Section (BJT) VOC Breakdown Collector Voltage IOC = 10mA VSAT Switching Saturation Voltage IOC = 600mA IS Maximum Output Current 700 600 V 660 1 V 720 mA tr Output Rising Time CL = 1nF 75 ns tf Output Falling Time CL = 1nF 75 ns 2.6 V Reference Voltage Section VREF Version：2.0 Reference Voltage April-2017 IO = 1mA Page 3 2.4 2.5 http://www.cschip.com CSC7203 ΔVLOAD ΔVREF/ΔTA VN ΔVstab Load Regulation IO = 0.1mA ~ 1.2mA Temperature Stability Factor TA = 0°C ~ 70°C Output Noise f = 10Hz ~ 10kHz Long-Term Stability 3 mV/°C 0.2 50 TA = 85°C, 5 1000 hours % μV mV Oscillator fOSC Oscillator Frequency VFB = 1.6V ~ 2.8V 50 65 70 kHz 75 % PWM Section DMAX DMIN Maximum Duty Cycle 5 Minimum Duty Cycle % VCC Power Section ICC Supply Current Vstart VCC = 5V, 10 20 30 mA Start-up Voltage 4.8 5 5.2 V Vshut Oscillator Shutdown Voltage 4.0 4.2 4.4 V VLIM Over-voltage Limit Threshold 5.6 5.8 6.0 V Version：2.0 April-2017 VFB = 2.2V Page 4 http://www.cschip.com CSC7203 EF20 T1 +12V L2 D7 D5 D1-D4 IN4007*4 C3 222/1kV C8 C1 33uF/400V C7 R2 TYPICAL APPLICATION CIRCUIT GND 5 104/275V CX1 C4 R8 R6 6 4 PC817C C6 7 3 R5 8 2 R9 1 223/50V S600 LF1 CSC7203 47uF/16V C2 F1 2A/50V TL431 R7 N L CY1 222/400V Figure.2 typical application diagram Version：2.0 April-2017 Page 5 http://www.cschip.com CSC7203 PACKAGE INFORMATION DIP8 E1 D c eA eB b2 L A2 A A1 e b1 Symbol Dimensions In Millimeters Min Max Min Max A 3.600 4.000 0.142 0.157 A1 0.380 A2 3.000 3.600 0.118 0.142 b1 0.390 0.530 0.015 0.021 b2 0.015 1.52BSC 0.060BSC c 0.200 0.350 0.008 0.014 D 9.050 9.450 0.356 0.372 E1 6.200 6.600 0.244 0.260 e Version：2.0 Dimensions In Inches 2.54BSC 0.100BSC eA 7.320 7.920 0.288 0.312 eB 8.000 9.000 0.315 0.354 L 3.000 April-2017 0.118 Page 6 http://www.cschip.com