MR4530 datasheet(29/43 Pages) SHINDENGEN

Part #	MR4530

Description	Partial Resonance Power Supply ICModule

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	SHINDENGEN [Shindengen Electric Mfg.Co.Ltd]

Direct Link	http://www.shindengen.co.jp/

Logo

29 / 43 page

Shindengen Electric MFG.CO.,LTD

- 59 -

6.2.4 Connecting a capacitor to a secondary diode in parallel

The secondary diode handles switching. Add a capacitor to reduce noise.

Try the diodes on an actual board to determine which is most effective. It may

help to connect a damping resistor to this capacitor in series.

Ideally, use a mica or polypropylene capacitor. A low-loss ceramic capacitor

should also prove adequate. Consult with the manufacturer before using this type

of capacitor.

6.2.5 Capacitive coupling

You can also couple the primary GND and the secondary GND with a capacitor.

Take great care to consider the leakage current between the primary and

secondary and the safety standards.

6.2.6 Other measures

(1) Place bead cores around the drain (collector) pin (Pin 9).

(2) Place bead cores around the secondary diode.

NS1

NS2

Fig. 6.14 Adding a capacitor to

the secondary side

NS1

NS2

NS1

Fig. 6.15 Capacitive coupling

6. Supplementary design information

MR4530 Datasheet(PDF) 29 Page - Shindengen Electric Mfg.Co.Ltd