HV440 データシートの表示（PDF） - Supertex Inc

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HV440

High Voltage Ring Generator IC

Supertex Inc 

Supertex inc.

HV440

High Voltage

Ring Generator IC

Features

►► 220V maximum operating voltage

►► Integrated high voltage transistors

►► Up to 70VRMS ring signal

►► Pulse by pulse output over current protection

►► 5 REN output capability

►► External MOSFETs enhance output rating to 20 REN

General Description

The Supertex HV440 is a monolithic integrated circuit capable

of generating up to 70V RMS sine wave output at frequencies

of 15 to 60Hz with a load of 5 North American RENs. Its

out putrating can be enhanced to 20 North American RENs

with the addition of two Supertex MOSFETs: one N-Channel

MOSFET, the TN2524N8, and one P-Channel MOSFET, the

TP2522N8.

Applications

►► Microcontroller or microprocessor controlled high

voltage ring generator

►► Set-top/street box ring generator

►► Pair gain ring generator

►► Wireless local loops

►► Fibre in the loop/to the curb

►► Coax cable loop

The high voltage output P- and N-Channel transistors are

controlled independently by the logic inputs PIN and NIN.

Connecting the mode pin to ground will enable the device

to be controlled with a single input, NIN. This adds a 200ns

deadband on the control logic to avoid cross conduction on

the high voltage output. A logic high on NIN will turn the high

voltage P-Channel on and the N-Channel off. The high voltage

outputs have pulse by pulse overcurrent protection set by two

external sense resistors. Nominal PWM logic input frequency

is 100KHz.

Typical Application Circuit

VDD

PIN

NIN

m-Controller EN

Mode

GND

Logic

HV440

High

Voltage

Level

Translator

Current

Sense

and

Driver

Linear

Reg

VDD

High

Voltage

Level

Translator

Linear

Reg

Current

Sense

and

Driver

VPP1

4.3Ω

VPSEN

PGATE

VPP2

HVOUT

PGND

0.1µF

Sine Wave

Ring Output

1.5mH

0.22µF

VNN2

NGATE

0.1µF

VNSEN

4.3Ω

VNN1

Doc.# DSFP - HV440

C031414

Supertex inc.

www.supertex.com

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