Operation descriptions

VIPER17

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Equation 10

minimum mains and maximum load.

The BR pin is a high impedance input connected to high value resistors, thus it is prone to

pick up noise, which might alter the OFF threshold when the converter operates or gives

origin to undesired switch-off of the device during ESD tests.

It is possible to bypass the pin to ground with a small film capacitor (e.g. 1-10 nF) to prevent

any malfunctioning of this kind.

If the Brown-out function is not used the pin has to be connected to GND.

BRhyst

BRhyst

L

L

BRhyst

BRhyst

INoff

INon

H

I

V

R

R

I

V

V

V

R

+

×

−

−

=