EP11 datasheet(26/46 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

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26 / 46 page

EPR-00011 - 70 W Adapter

22-Jan-01

Page 26 of 46

Power Integrations Inc

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

www: http://www.powerint.com

10.3 Output Voltage During Power-down

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.

During power down the output voltage falls to zero with no ‘glitching’ due to line under

voltage sensing.

Figure 20 - Shut-down, 5.25

Ω load, 85 V

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

Figure 21 - Shut-down, No-load, 85 VAC

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

10.4 Drain Voltage and Current during Power-Up (265 VAC)

The waveform was captured using a Yokogawa oscilloscope.

Figure 22 – Start-up, 5.25

Ω load, 265 V

VDRAIN & IDRAIN (200 V & 1 A/div, 1

µs/div)

Peak DRAIN voltage is acceptable at < 600 V, well below the recommended maximum of

650 Vpk. DRAIN current waveform shows no sign of core saturation.

VOUT

VC7

VDRAIN

IDRAIN

EP11 Datasheet(PDF) 26 Page - Power Integrations, Inc.