IP5661C

LAB TOP VIEW VCC VZ FEEDBACK GAIN 1 8 SEME IP5661C IP5561C GND OUTPUT CURRENT SENSE RT/CT 2 7 SWITCHED–MODE POWER SUPPLY CONTROL CIRCUIT FEATURES STABILISED POWER SUPPLY TEMPERATURE COMPENSATED REFERENCE SOURCE SAWTOOTH GENERATOR PULSE WIDTH MODULATOR CURRENT LIMITING 8 PIN DIP VCC 3 6 4 5 J Package – 8 Pin Ceramic DIP N Package – 8 Pin Plastic DIP D Package – 8 Pin Plastic (150) SOIC BLOCK DIAGRAM RT CT 5 REFERENCE VOLTAGE ERROR AMP FEEDBACK GAIN 3 SAWTOOTH GENERATOR DESCRIPTION 7 S 4 OUTPUT PWM LATCH R 0.5V CURRENT SENSE 6 STABILISED SUPPLY 2 8.2V Vz 1 8 VCC GND The IP5561 is a control circuit for use in switched mode power supplies. This single monolithic chip incorporates all the control and supervisory (protection) functions required in switched mode power supplies, including an inter nal temperature compensated reference source, internal zener reference, sawtooth generator, pulse width modulator, output stage and cycle by cycle current limit. Order Information Part Number IP5561 IP5561C J–Pack 8 Pin N–Pack 8 Pin D–8 8 Pin Temp. Range -55 to +125°C 0 to +70°C Note: To order, add the package identifier to the part number. eg. IP5561J IP5561CD–8 ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated) SUPPLY Voltage Sourced Current Sourced 18V 30mA OUTPUT TRANSISTOR Output Current Collector Voltage (Pin 7) Operating Junction Temperature Storage Temperature Range Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. ...