RDK-83 Power Integrations, RDK-83 Datasheet - Page 27

• 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
11.5 Output Ripple Measurements
11.5.1 Ripple Measurement Technique
For DC output ripple measurements, a modified oscilloscope test probe must be utilized
in order to reduce the pickup of spurious signals. Details of the probe modification are
provided in Figure 20 and Figure 21.
The 5125BA probe adapter (from probe master) is affixed with two capacitors tied in
parallel across the probe tip. The capacitors include one (1) 0.1 µF/50 V ceramic type
and one (1) 1.0 µF/50 V aluminum electrolytic. The aluminum electrolytic type capacitor
is polarized, so proper polarity across DC outputs must be maintained (see Figure 21).
Probe Ground
Probe Tip
Figure 20 – Oscilloscope Probe Prepared for Ripple Measurement (End Cap and Ground Lead Removed).
Figure 21 – Oscilloscope Probe with Probe Master 5125BA BNC Adapter (Modified with wires for probe
ground for ripple measurement, and two parallel decoupling capacitors added).
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