SR087 - Supertex Inc

SR087 Adjustable Off-Line Inductorless Switching Regulator

The Supertex SR087 is an inductorless switching regulator designed to operate directly from a rectified AC line. The operating principle is to turn on a pass transistor when the rectified AC is below the output voltage, and to turn it off when the output voltage reaches a specific level. A linear regulator supplied by VOUT provides an additional fixed 5.0V o.

Features

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►Efficient operation without magnetics
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►No high voltage capacitors
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►Adjustable main output voltage (9.0 to 50V)
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►Additional 5.0V internal regulator
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►Up to 100mA combined output current
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►Single BOM for 120VAC/230VAC
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►Built-in soft start
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►Less than 200mW standby power Applications
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► White goods
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► Household appliances
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► Lighting controls
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► Circuit breakers
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► Keep-alive supplies General Description The Supertex SR087 is an inductorless switching regulator designed to operate directly from a rectified AC line. The operating principle is to turn on a pass transistor when the rectified .