SR037

Accepts peak input voltages up to 700V
Operates directly off of rectified 120V AC or 240V AC
Integrated linear regulator
Minimal power dissipation
No high voltage capacitors required
No transformers or inductors required

 3.3V or 5.0V power supplies
SMPS house keeping power supplies
White goods
Appliances
Small off-line low voltage power supplies
Lighting controls

The Supertex SR036 and SR037 are inductorless, dual output off-line controllers. They do not require any transformers,inductors, or high voltage input capacitors. The input voltage,HVIN, is designed to operate from an unfiltered full wave rectified 120V or 240V AC line. It is designed to control an external N-channel MOSFET. When HVIN is between VGS(th) to 40V, where VGS(th) is the threshold voltage of the external MOSFET, the external N-channel MOSFET is turned on allowing it to charge an external capacitor connected to VSOURCE.An unregulated DC voltage will develop on VSOURCE.Once HVIN is above 45V, the N-channel MOSFET is turned off. The maximum gate voltage for the external MOSFET is 24V. The unregulated
voltage is approximately 18V. The SR036 also provides a regulated 3.3V whereas the SR037 provides a regulated 5.0V.