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BIPOLAR ANALOG INTEGRATED CIRCUIT

µµµµPC1909

SWITCHING REGULATOR CONTROL IC

Document No. G14309EJ2V0DS00 (2nd edition)

Date Published November 2000 NS CP(K)

Printed in Japan

DATA SHEET

1999

©

DESCRIPTION

The

µPC1909 is a switching regulator control IC ideal for primary side control of active-clamp typeNote DC/DC

converters. This IC has 2 outputs employing a totem-pole circuit with peak output current 1.2 A, and is capable of

directly driving a power MOS FET. As a result, it has been possible to realize primary side control of an active-clamp

type converter on a single chip.

Note It is necessary to obtain license from Vicor Corporation before using the

µPC1909 in an active-clamp type circuit.

FEATURES

•

2 on-chip outputs; for Q and Q

•

Capable of directly driving a power MOS FET

•

Drive supply voltage range: 7 to 24 V

•

On-chip remote control circuit

•

On-chip pulse-by-pulse overcurrent protection circuit

•

On-chip overvoltage latch circuit

ORDERING INFORMATION

Part Number

Package

µPC1909CX

16-pin plastic DIP (7.62 mm (300))

µPC1909GS

16-pin plastic SOP (7.62 mm (300))

The mark 5 shows major revised points.