LCS700-708 datasheet(18/26 Pages) POWERINT

Teilenummer	LCS700-708

Bauteilbeschribung	Integrated LLC Controller, High-Voltage Power MOSFETs and Drivers

PDF	26 Pages

Scroll/Zoom	100%

Hersteller	POWERINT [Power Integrations, Inc.]

Direct Link	http://www.powerint.com

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18 / 26 page

Rev. B 062011

LCS700-708

www.powerint.com

PI-6470-062811

100

400

300

200

Time ( s)

-5

24.0

23.9

24.1

Figure 26. Zoom in of Last Few Switching Cycles of Burst Pulse Train of Figure 24.

The Switching Frequency of the Last Few Cycles is f

STOP, 383 kHz in

This Case (arrow). The Ringing in V

HB After Switching Stops, is the

Primary Inductance Ringing with the MOSFET Capacitance.

Higher f

START will decrease the load threshold at which bursting

begins, increase the input voltage threshold and decrease the

output ripple in burst mode, but will increase the burst repetition

rate, which may introduce audible noise in some combinations

of line and load. The choice of f

START will affect the large signal

transient response where the HiperLCS goes in and out of burst

mode.

LCS700-708 Datenblatt(PDF) 18 Page - Power Integrations, Inc.