RDK-91 Power Integrations, RDK-91 Datasheet - Page 5

• Manufacturer Part Number: RDK-91
• Description: KIT DESIGN REF TINYSWITCH-III
• Manufacturer: Power Integrations
• Series: TinySwitch®-IIIr

Specifications of RDK-91

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Non-Isolated
• Power - Output: 12W
• Voltage - Output: 12V
• Current - Output: 1A
• Voltage - Input: 85 ~ 265VAC
• Regulator Topology: Flyback
• Board Type: Fully Populated
• Utilized Ic / Part: TNY274, TNY275, TNY276, TNY277, TNY278, TNY279, TNY280
• Product: Accessories & Kits
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Other names: 596-1194

1 Introduction
This report describes a universal input, 12 V, 1 A flyback power supply using a
TNY278PN device from the TinySwitch-III family of ICs.
specification of the power supply, a detailed circuit diagram, the entire bill of materials
required to build the supply, extensive documentation of the power transformer, along
with test data and oscillographs of the most important electrical waveforms. 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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Figure 1 – RD-91 Populated Circuit Board Photographs.
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