EP11 datasheet(25/46 Pages) POWERINT

Part #	EP11

Description	Engineering Prototype Report - 70 W (19 V 3.66A) Universal Input Adapter (EP11)

PDF	46 Pages

Scroll/Zoom	100%

Manufacturer	POWERINT [Power Integrations, Inc.]

Direct Link	http://www.powerint.com

Logo

25 / 46 page

EPR-00011 - 70 W adapter

08-Dec-00

Page 25 of 46

Power Integrations Inc

Tel: +1 408 414 9200 Fax: +1 408 414 9201

www: http://www.powerint.com

10.2 Output Voltage During Power-up

Both waveforms were captured using a Yokogawa Oscilloscope. Upper trace is VOUT, the

output voltage and the lower trace is VC7, the voltage across the input capacitor (C7).

Timebase is 50 ms/div.

In all cases the output voltage reaches regulation with no output overshoot.

During

operation at 85 VAC the ripple present on the DC rail voltage can be clearly seen.

Figure 17 - Start-up, 5.25

Ω load, 85 V

VOUT & VC7 (10 & 100 V/div, 50ms/div)

Figure 19 - Start-up, No load, 265 VAC

VOUT & VC7 (10 & 100 V/div, 50ms/div)

Figure 18 - Start-up, 5.25

Ω load, 265 V

VOUT & VC7 (10 & 200 V/div, 50ms/div)

VOUT

VC7

VOUT

VC7

EP11 Datasheet(PDF) 25 Page - Power Integrations, Inc.