RDK-91

The RDK-91 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.

• Meets all existing and proposed harmonized energy efficiency standards including
• No load consumption 140mW at 265VAC (no bias winding required)
• Greater then 75% active mode efficiency (exceeds standards requirement of 71%)
• BP/M capacitor value selects power MOSFET current limit for greater design flexibility
• Output overvoltage protection using primary bias winding sensed shutdown
• Increases MOSFET and magnetics power delivery
• Reduces overload power, which lowers output diode and capacitor costs
• Integrated TinySwitch-III safety/reliability
• Meets EN550022 and CISPR-22 class B conducted EMI with greater then 12dBµV margin
• Meets IEC61000-4-5 class 3 AC line surge

Applications

Power Management