RDK-83 Power Integrations, RDK-83 Datasheet - Page 9

• Manufacturer Part Number: RDK-83
• Description: KIT DESIGN REF LINKSWITCH LP
• Manufacturer: Power Integrations
• Series: LinkSwitch®-LPr

Specifications of RDK-83

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 1.6W
• Voltage - Output: 7.7V
• Current - Output: 210mA
• Voltage - Input: 85 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 66kHz
• Board Type: Bare (Unpopulated) and Fully Populated
• Utilized Ic / Part: LNK562, LNK563, LNK564
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 596-1128

29-Sept-06
RDR-83 7.7 V, 210 mA Adapter with 10 kV surge withstand
4.4 Output Rectification
The transformer secondary winding is rectified by D4 and filtered by C4. A small preload
resistor (R8) limits the no-load output voltage. Decreasing the value of the preload
resistor will further reduce the no-load output voltage, at the expense of increasing the
no-load input power consumption. In this design, a fast diode (rather than an ultra-fast)
was used for D4 to lower cost and EMI emissions.
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