MP020-5 datasheet(16/20 Pages) MPS

Teilenummer	MP020-5

Bauteilbeschribung	Offline, Primary-Side Regulator with CC/CV Control and a 700V FET

PDF	20 Pages

Scroll/Zoom	100%

Hersteller	MPS [Monolithic Power Systems]

Direct Link	http://www.monolithicpower.com

Logo

16 / 20 page

MP020-5 – OFFLINE, PRIMARY-SIDE REGULATOR WITH CC/CV CONTROL AND A 700V FET

MP020-5 Rev. 1.05

www.MonolithicPower.com

1/23/2014

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

EMI (Output GND connect to earth) without Y

cap. The Y cap will bring about the leakage

current which is prohibited in some cell phone

charger application. Figure 15 could illustrate

how the Common Noise of the secondary side

diode be restrained. The secondary side

winding split to two separate windings NSEC1

and NSEC2 which have same turns and

approximate parasitic capacitor CSP1,and CSP2

but their ‘hot spot’ is opposite as the Point 9

and Point 10 in Figure 15, so the common

mode noise current produced at secondary side

windings can be counteracted each other.

The transformer structure could be simple if the

application does not need to pass the 3 wire

Conducted EMI or could use the Y cap. Figure

16 shows the schematic with the simple

transformer structure.

MP020-5 Datenblatt(PDF) 16 Page - Monolithic Power Systems