HV9906 Ver la hoja de datos (PDF) - Supertex Inc

Número de pieza

componentes Descripción

Fabricante

HV9906

FLEX SWITCH™ (Simple Off-Line/PFC & >9V DC/DC Switcher)

Supertex Inc 

HV9906

Pinout

Pin Description

+Vin 1

Von 2

Vdd 3

HV9906

8 GATE

7 PGND

6 NS

+VIN – This pin is the input to the internal linear regulator.

VON –The voltage applied to this pin by a resistor voltage divider

from +VIN controls the on time (pulse width) of the gate output.

VDD – This pin is the output of the internal linear regulator and the

supply pin for the internal circuits. It must be bypassed with a low

ESR capacitor to provide a low impedance path for the gate drive

and be capable of storing sufficient energy so that the voltage does

not decay below the UVLO threshold during the time when the

input voltage is below the minimum required by the regulator.

AGND – This pin is the common connection for analog circuits.

AGND 4

5 PS

GATE – This pin is the output for driving the gate of an external N-

channel MOSFET.

PGND – This is the common connection for the GATE drive circuit.

NS – This pin is the negative terminal of the differential sense

feedback circuit.

PS – This pin is the positive terminal of the differential sense

feedback circuit.

__________________________________________________________________________________________________________________

Functional Block Diagram

+Vin

High Voltage

Regulator

Von

Vdd

AGND

Bandgap

1V

Reference Vref

UVLO

Vdd

and

POR

Vdd

C

VCO

C

Reset Pulse

Delay Sample Pulse

Delay

Vdd

1V

1V

Vref

R

_

Q Q Driver

GATE

S

PGND

NS

PS

3

07/23/02

Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com

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