Description The FSL126MRT is an integrated Pulse Width Modulation (PWM) controller and SenseFET specifically 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.

Features  Internal Avalanched Rugged 650V SenseFET
 Advanced Soft Burst-Mode Operation for Low Standby Power and Low Audible Noise
 Random Frequency Fluctuation 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 and Under-Voltage Lockout (UVLO) with Hysteresis
 Low Operating Current(0.4mA) in Burst Mode
 Internal Startup Circuit
 Built-in Soft-Start: 15ms
 Auto-Restart Mode

Applications  Power Supply for STB Home Appliances, and DVD Combination

Manufacturer	onsemi
Product Category	AC DC Converters, Offline Switchers
Series	FPS™
Type	Current Mode PWM Controllers
Packaging	Tube
Unit-Weight	0.097074 oz
Mounting-Style	Through Hole
Operating-Temperature-Range	- 40 C to + 125 C
Package-Case	TO-220-6
Operating-Temperature	-40°C ~ 125°C (TJ)
Mounting-Type	Through Hole
Supplier-Device-Package	TO-220-6
Watt	40W
Number-of-Outputs	1 Output
Output-Isolation	Isolated
Internal-Switch-s	Yes
Voltage-Breakdown	650V
Topology	Flyback
Voltage-Start-Up	12V
Voltage-Supply-Vcc-Vdd	7.5 V ~ 26 V
Duty-Cycle	67%
Frequency-Switching	67kHz
Fault-Protection	Current Limiting, Over Load, Over Temperature, Over Voltage
Control-Features	-
Isolation	Isolated
Output-Power	40 W
Maximum Operating Temperature	+ 125 C
Output-Voltage	-
Operating-Supply-Current	1 mA
Output-Current	1.2 A
Switching-Frequency	61 kHz to 73 kHz
Package-Case	TO-220F
Duty-Cycle-Max	73 %
Input-Supply-Voltage-Min	8 V
Input-Supply-Voltage-Max	14 V