NE5560 - Switched-mode power supply control circuit Philips Semiconductors
Switched-mode power supply control circuit
The NE/SE5560 is a control circuit for use in switched-mode power supplies. This single monolithic chip incorporates all the control and housekeeping (protection) functions required in switched-mode power supplies, including an internal temperature-compensated reference source, internal Zener references, sawtooth generator, pulse-width modulator, output stage and various protection circuits.
D, F, N Packages
VCC 1 VZ 2 16 FEEDFORWARD 15 OUTPUT (COLL) 14 OUTPUT (EMIT) 13 DEMAG: OVERVOLTAGE 12 GND 11 CURRENT LIMITING 10 REMOTE ON/OFF 9 EXTERNAL SYNC
FEEDBACK 3 GAIN 4
MODULATOR 5 DUTY CYCLE CONTROL 6 RT 7
• Stabilized power supply • Temperature-compensated reference source • Sawtooth generator • Pulse-width modulator • Remote on/off switching • Current limiting • Low supply voltage protection • Loop fault protection • Demagneti