RDK-91

POWER INTEGRATIONS RDK-91 Reference Design Kit, Flyback 12W Power Supply, Using TinySwitch®-III IC

The is a universal input, 12V, 1A flyback power supply using a TNY278PG device from the Tinyswitch-III family of ICs. The board provides a number of user configurable options which are designed to demonstrate the features and flexibility of the TinySwitch-III family. These include easy adjustment of the device current limit for increased output power or higher efficiency operation, and a latched output overvoltage shutdown.

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Meets all existing and proposed harmonized energy efficiency standards including

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No load consumption 140mW at 265VAC no bias winding required

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Greater then 75% active mode efficiency exceeds standards requirement of 71%

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BP/M capacitor value selects power MOSFET current limit for greater design flexibility

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Output overvoltage protection using primary bias winding sensed shutdown

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Increases MOSFET and magnetics power delivery

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Reduces overload power, which lowers output diode and capacitor costs

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Integrated TinySwitch-III safety/reliability

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Meets EN550022 and CISPR-22 class B conducted EMI with greater then 12dBµV margin

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Meets IEC61000-4-5 class 3 AC line surge