FSL126HR Series

650V Integrated Power Switch with 100kHz frequency and adjustable current limit for 17W offline flyback converters

Catalog

650V Integrated Power Switch with 100kHz frequency and adjustable current limit for 17W offline flyback converters

Part	Output Isolation	Mounting Type	Internal Switch(s)	Voltage - Start Up	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Duty Cycle	Power (Watts)	Supplier Device Package	Frequency - Switching	Fault Protection	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Package / Case	Package / Case	Package / Case	Voltage - Breakdown
ON Semiconductor FSL126HR	Isolated	Through Hole		12 V	105 °C	-40 °C	Flyback	77 %	21 W	8-DIP	100 kHz	Current Limiting Over Load Over Temperature Over Voltage Short Circuit	8 V	26 V	0.3 in	8-DIP	7.62 mm	650 V
ON Semiconductor FSL126MR	Isolated	Through Hole		12 V	105 °C	-40 °C	Flyback	77 %	21 W	8-DIP	67 kHz	Current Limiting Over Load Over Temperature Over Voltage Short Circuit	8 V	26 V	0.3 in	8-DIP	7.62 mm	650 V

Catalog

650V Integrated Power Switch with 100kHz frequency and adjustable current limit for 17W offline flyback converters

Key Features

• Internal Avalanche-Rugged SenseFET (650V)

• Under 50mW Standby Power Consumption at265VAC, No-load Condition with Burst Mode

• Precision Fixed Operating Frequency withFrequency Modulation for Attenuating EMI

• Internal Startup Circuit

• Built-in Soft-Start: 20ms

• Pulse-by-Pulse Current Limiting

• Various Protections: Over-Voltage Protection(OVP), Overload Protection (OLP), Output-ShortProtection (OSP), Abnormal Over-CurrentProtection (AOCP), Internal Thermal ShutdownFunction with Hysteresis (TSD)

• Auto-Restart Mode

• Under-Voltage Lockout (UVLO)

• Low Operating Current: 1.8mA

• Adjustable Peak Current Limit

Description

The FSL126HR integrates a Pulse Width Modulator (PWM) and SenseFET is specifically designed for highperformance offline Switch-Mode Power Supplies (SMPS) with minimal external components. FSL126HR includes integrated high-voltage power switching regulators that combine an avalanche-rugged SenseFET with a current-mode PWM control block. The integrated PWM controller includes: Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), a frequency generator for EMI attenuation, an optimized gate turn-on/turn-off driver, Thermal Shutdown (TSD) protection, and temperaturecompensated precision current sources for loop compensation and fault protection circuitry. The FSL126HR offers good soft-start performance. When compared to a discrete MOSFET and controller or RCC switching converter solution, the FSL126MR reduces total component count, design size, and weight; while increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for the design of cost-effective flyback converters.