UC1845A Series

PWM Controller flyback or forward - Low start-up current (0.5mA max.) 500KHz op

Catalog

PWM Controller flyback or forward - Low start-up current (0.5mA max.) 500KHz op

Part	Synchronous Rectifier	Output Configuration	Control Features	Output Phases	Clock Sync	Output Type	Supplier Device Package	Number of Outputs	Package / Case	Package / Case	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Topology	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Duty Cycle (Max) [Max]	Function
Microchip Technology UC1845AY		Isolation Capable, Positive	Frequency Control	1		Transistor Driver	8-CERDIP	1	7.62 mm	0.3 in	8-CDIP	125 °C	-55 °C	Through Hole	Boost, Buck, Flyback, Forward	7.6 V	30 V	48 %	Step-Down, Step-Up

Catalog

PWM Controller flyback or forward - Low start-up current (0.5mA max.) 500KHz op

Key Features

• * Optimized For Off-Line Control

• * Low Start-Up Current (<1mA)

• * Automatic Feed Forward Compensation

• * Trimmed Oscillator Discharge Current

• * Pulse-By-Pulse Current Limiting

• * Enhanced Load Response Characteristics -

• * Double-Pulse Suppression

• * High-Current Totem-Pole Output (1A Peak)

• * Internally Trimmed Band-gap Reference

• * 500kHz Operation Under-voltage Lockout: SG1843 - 8.4 volts

• * Low Shoot-Through Current <75mA Over Temperature

Description

Control ICs provides all the necessary features to implement off-line fixed-frequency, current-mode switching power supplies with a minimum of external components. The current mode architecture demonstrates improved load regulation, pulse-by- pulse current limiting and inherent protection of the power supply output switch