WS2596B datasheet(7/9 Pages) ETC2

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WS2596B Product Description

WINSEMI MICROELECTRONICS

The Vcs will rise up rapidly when the secondary SBD is

shorted of the transformer is saturation. When Vcs >1.5V,

the switching pulses will be stopped, and IC auto-restart.

If VFB>-1.2V during primary ON, IC will auto-restart, too.

CS Threshold

When the load is high, the CS threshold is 500mV. To

improve the audio noise suppression, the CS threshold will

be reduced to 330mV when the system operates with light

load or no load.

Slope Drive Technology

Because the transistor is a current amplifier, its collector

current and base current has a certain ratio. WS2596B works

in discontinuous mode. When the internal BJT is ON, the

collector current will rise from 0, in order to reduce the driving

loss, the base current will start from 12mA, and then with the

CS voltage rise, base current ratio increased, when the CS

voltage reached 430mV, the base current will rise to 40mA.

Random Frequency jitter

WS2596B has built-in random frequency jitter to reduce

system EMI.

WS2596B Folha de dados(PDF) 7 Page - List of Unclassifed Manufacturers