TDA4601

Control ICs for Switched-Mode Power Supplies TDA 4601 Bipolar IC Features q Direct control of the switching transistor q Low start-up current q Reversing linear overload characteristic q Base current drive proportional to collector current q Protective circuit in case of disturbance P-SIP-9-1 Type TDA 4601 Ordering Code Q67000-A2379 Package P-SIP-9-1 The integrated circuit TDA 4601/D is designed for driving, controlling and protecting the switching transistor in self-oscillating flyback converter power supplies as well as for protecting the overall power supply unit. In case of disturbance, the rise of the secondary voltage is prevented. In addition to the ICs application range including TV-receivers video tape recorders, hifi devices and active loudspeakers, it can also be used in power supply units for professional applications due to its wide control range and high voltage stability during increased load changes. Semiconductor Group 7 06.94 Pin Definitions and Functions Pin No. 1 2 3 4 5 6 7 8 9 Function VREF output Zero passage identification Input control amplifier, overload amplifier Collector current simulation Connection for additional protective circuit Ground (rigidly connected to substrate mounting plate) DC-output for charging coupling capacitor Pulse output - driving of switching transistor Supply voltage TDA 4601 Block Diagram Semiconductor Group 8 TDA 4601 Circuit Description The TDA 4601 is designed for driving, controlling and protecting the...