TDA8385

Philips Semiconductors Preliminary specification Control circuit for a Self-Oscillating Power Supply (SOPS) FEATURES Bandgap reference generator Slow-start circuitry Low-loss peak current sensing Over-voltage protection Hysteresis controlled stand-by function Error amplifier with gain setting Programmable transfer character generator Protection against open- and short-circuited feedback loop ORDERING INFORMATION EXTENDED TYPE NUMBER TDA8385 PACKAGE PINS 16 PIN POSITION DIL MATERIAL plastic Over-load current fold back characteristic LED driver Demagnetization protection Programmable determination of switch-on moment of switching transistor for low-switching losses Feed-forward input Regulation-indicator output Programmable minimum on-time of switching transistor Accurate peak-current setting. TDA8385 GENERAL DESCRIPTION The TDA8385 is intended to be used in combination with the opto-coupler (CNR50) as a control unit for a self-oscillating power supply. CODE SOT38WBE March 1994 2 Philips Semiconductors Preliminary specification Control circuit for a Self-Oscillating Power Supply (SOPS) BLOCK DIAGRAMS VP handbook, full pagewidth TDA8385 GND 16 14 latch current reference setting 3 I ref REFERENCE BLOCK 2 I ref Vref STABILIZED SUPPLY 1 Vstab V P (min) DETECTOR 28 reset (28, 27, 23) SUPPLY REFERENCES I feed forward input 13 V fo V ts regulation indicator output 1 RIO REGULATION INDICATOR 29 X 7 Vmv differential amplifier o...