TOP264VG datasheet(28/36 Pages) POWERINT

28 / 36 page

Rev. B 03/10

TOP264-271

www.powerint.com

NOTES:

A. Derived during test from the parameters DC

MAX, IB and IC(OFF) at 132 kHz.

B. For specifications with negative values, a negative temperature coefficient corresponds to an increase in magnitude with

increasing temperature, and a positive temperature coefficient corresponds to a decrease in magnitude with increasing

temperature.

C. Guaranteed by characterization. Not tested in production.

D. For externally adjusted current limit values, please refer to Figures 34 and 35 (Current Limit vs. External Current Limit Resistance)

in the Typical Performance Characteristics section. The tolerance specified is only valid at full current limit.

E. I2f calculation is based on typical values of I

LIMIT and fOSC, i.e. ILIMIT(TYP)

× f

OSC, where fOSC = 66 kHz or 132 kHz depending on F pin

connection. See f

OSC specification for detail.

F. The device will start up at 18 V

DC drain voltage. The capacitance of electrolytic capacitors drops significantly at temperatures

below 0 °C. For reliable start up at 18 V in sub zero temperatures, designers must ensure that circuit capacitors meet recom-

mended capacitance values.

G. Breakdown voltage may be checked against minimum BV

DSS specification by ramping the DRAIN pin voltage up to but not

exceeding minimum BV

DSS.

TOP264VG 데이터시트(PDF) 28 Page - Power Integrations, Inc.