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SR036MG Datasheet(PDF) 1 Page - Supertex, Inc |
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SR036MG Datasheet(HTML) 1 Page - Supertex, Inc |
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1 / 19 page  1 SR036/SR037 B092005 Inductorless, Dual Output Off-Line Regulators SR036 SR037 General Description The Supertex SR036 and SR037 are inductorless, dual output off-line controllers, providing up to 1.0W of output power. They do not require any transformers, inductors, or high voltage input capacitors. The input voltage, HV IN, is designed to operate from an unfiltered full wave rectified 120V or 230V AC line. It is designed to control an external N-channel MOSFET or IGBT. When HV IN is less than 45V, the external transistor is turned-on allowing it to charge an external capacitor connected to VSOURCE. An unregulated DC voltage will develop on VSOURCE. Once HV IN is above 45V, the transistor is turned off. The maximum gate voltage for the external transistor is 24V. The unregulated voltage is approximately 18V. The SR036 also provides a regulated 3.3V whereas the SR037 provides a regulated 5.0V. WARNING!!! Galvanic isolation is not provided. Dangerous voltages are present when connected to the AC line. It is the responsibility of the designer to assure adequate safeguards are in place to protect the end user from electrical shock. Features ❑ Accepts peak input voltages up to 700V ❑ Operates directly off of rectified 120V AC or 230V AC ❑ Integrated linear regulator ❑ Minimal power dissipation ❑ No high voltage capacitors required ❑ No transformers or inductors required ❑ Up to 1.0W output power Applications ❑ 3.3V or 5.0V power supplies ❑ SMPS house keeping power supplies ❑ White goods ❑ Appliances ❑ Small off-line low voltage power supplies ❑ Lighting controls SR03x Typical Application Circuit SR036 or SR037 470µF 1.0µF SR036: VOUT = 3.3V Regulated SR037: VOUT = 5.0V Regulated ~18V Unregulated 120VAC or 230VAC VOUT VSOURCE HVIN GN2470 1.0µF B092005 Not R ecommended Not R ecom men ded For Ne w Designs! For N ew D esign s! |
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