Product Summary

The SG3524BN is a pulse width modulator for switching power supplies which features improved performance over industry standards like the SG1524. A direct pin-for-pin replacement for the earlier device, the SG3524BN combines advanced processing techniques and circuit design to provide improved reference accuracy, and extended common mode range at the error amplifier and current limit inputs. A DC-coupled flip-flop eliminates triggering and glitch problems, and a PWM data latch prevents edge oscillations. The SG3524BN incorporates true digital shutdown for high speed response, while an undervoltage lockout circuit prevents spurious outputs when the supply voltage is too low for stable operation. Full double-pulse suppression logic insures alternating output pulses when the Shutdown pin is used for pulse-by-pulse current limiting. The SG3524BN is designed for the commercial range of 0 to 70℃.

Parametrics

SG3524BN absolute maximum ratings: (1)Input Voltage (+VIN) : 42V; (2)Collector Voltage: 60V; (3)Logic Inputs: -0.3V to 5.5V; (4)Current Limit Sense Inputs: -0.3V to VIN; (5)Output Current (each transistor): 200mA; (6)Reference Load Current: 50mA; (7)Oscillator Charging Current: 5mA; (8)Operating Junction Temperature: 150℃; (9)Storage Temperature Range: -65~150℃; (10)Lead Temperature (Soldering, 10 seconds): 300℃.

Features

SG3524BN features: (1)7V to 40V operation; (2)5V reference trimmed to ±1%; (3)100Hz to 400KHz oscillator range; (4)Excellent external sync capability; (5)Dual 100mA output transistors; (6)Wide current limit common mode range; (7)DC-coupled toggle flip-flop; (8)PWM data latch; (9)Undervoltage lockout; (10)Full double-pulse suppression logic; (11)60V output collectors.

Diagrams

SG350
SG350
Littelfuse
Gas Discharge Tubes (GDTs) / Gas Plasma Arrestors 263-437V 2A GDT T/R 2 Term
Data Sheet
0-1: $0.89
1-10: $0.82
10-100: $0.67
100-250: $0.58
SG3503
SG3503
Other

Data Sheet
Negotiable 
SG350LH-L
SG350LH-L
Panduit
Cable Ties Cable Tie SG Series 15.3"L (389mm) Li
Data Sheet
0-1: $0.49
1-100: $0.45
100-500: $0.42
500-1000: $0.40
SG350LH-TL0
SG350LH-TL0
Panduit
Cable Ties 15.3" 120 LBS Black
Data Sheet
0-1: $0.53
1-100: $0.49
100-500: $0.44
500-1000: $0.41
SG350LH-TL30
SG350LH-TL30
Panduit
Cable Ties Cable Tie, SG Series, 15.3"L (389mm), Li
Data Sheet
Negotiable 
SG350Q
SG350Q
Littelfuse
Gas Discharge Tubes (GDTs) / Gas Plasma Arrestors 263-437V GDT T/R 2 Term
Data Sheet
0-1: $0.89
1-10: $0.82
10-100: $0.67
100-250: $0.58