FSD146MRBN Series

650V Integrated Power Switch with Abnormal OCP for 26Watt offline flyback converters

Catalog

650V Integrated Power Switch with Abnormal OCP for 26Watt offline flyback converters

Part	Topology	Mounting Type	Package / Case	Package / Case	Package / Case	Fault Protection	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Power (Watts)	Operating Temperature [Min]	Operating Temperature [Max]	Duty Cycle	Frequency - Switching	Output Isolation	Supplier Device Package	Internal Switch(s)	Voltage - Start Up	Voltage - Breakdown
ON Semiconductor FSD146MRBN	Flyback	Through Hole	0.3 in	8-DIP	7.62 mm	Current Limiting Over Load Over Temperature Over Voltage Short Circuit	23 V	7.5 V	35 W	-40 °C	125 ¯C	67 %	67 kHz	Isolated	8-DIP		12 V	650 V

Catalog

650V Integrated Power Switch with Abnormal OCP for 26Watt offline flyback converters

Key Features

• Advanced Soft Burst-Mode Operation for Low Standby Power and Low Audible Noise

• Random Frequency Fluctuation (RFF) for Low EMI

• Pulse-by-Pulse Current Limit

• Various Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis, Output-Short Protection (OSP), and Under-Voltage Lockout (UVLO) with Hysteresis

• Low Operating Current (0.4mA) in Burst Mode

• Internal Startup Circuit

• Internal High-Voltage SenseFET: 650V

• Built-in Soft-Start: 15ms

• Auto-Restart Mode

Description

The FSD146MRBN is an integrated Pulse Width Modulation (PWM) controller and SenseFET designed for offline Switch-Mode Power Supplies (SMPS) with minimal external components. The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading-Edge Blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current sources for loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSD146MRBN can reduce total cost, component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for cost-effective design of a flyback converter.