UC3845 datasheet(5/8 Pages) TI

5 / 8 page

UC1842/3/4/5

UC2842/3/4/5

UC3842/3/4/5

UNDER-VOLTAGE LOCKOUT

CURRENT SENSE CIRCUIT

OSCILLATOR SECTION

During under-voltage lock-out, the output driver is biased to

sink minor amounts of current. Pin 6 should be shunted to

ground with a bleeder resistor to prevent activating the power

switch with extraneous leakage currents.

A small RC filter may be required to suppress switch transients.

Peak Current (IS) is Determined By The Formula

ISMAX

≈

1.0V

RS

5

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