HV441PJ-G 데이터 시트보기 (PDF) - Supertex Inc

부품명

상세내역

제조사

HV441PJ-G

High Voltage Ring Generator IC

Supertex Inc 

HV441

High Voltage Ring Generator IC

Features

General Description

► 220V maximum operating voltage

► Integrated high voltage transistors

► Up to 70 VRMS ring signal

► Adjustable AC and DC output voltage level

► Adjustable ring signal start phase angle

► Pulse by pulse output over current protection

► 5 REN output capability

► External MOSFETs enhance output rating to 20 REN

Applications

► Stand alone 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 Supertex HV441 is a monolithic integrated circuit capable

of generating up to a 70VRMS sine wave output at frequencies

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

rating 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.

The high voltage outputs have pulse by pulse over-current

protection set by two external sense resistors.

The HV441 generates a low voltage reference sine wave by

using external passive components. An external sine wave

signal can be used if desired. The HV441 amplifies the

reference sine wave signal by pulse width modulating the high

voltage output at a nominal frequency of 100KHz. An error

amplifier compares the output sine wave with the reference

sine wave and adjusts the pulse width accordingly. Both the

amplitude of the output sinewave and the DC offset voltage

are adjustable.

For detailed circuit and application information, please

refer to application note AN-H35.

Functional Block Diagram

Input2- Output2 VDD2

Input2+

Output1

Input1-

Input1+

VREF

ON/OFF

VDD1

OSC1

OSC2

OSC(IN)

OSC(OUT)

GND

-

+

op-amp2

VDD2

-

+

+

–

op-amp1 comp

OSC

÷4

VDD1

VDD2

Pulse Width

Regulator

Zero Voltage

Crossing

Detection

VDD2

Ramp

Generator

op-amp3 VDD2

+

–

High

Voltage

Level

Translator

Linear

Reg

Current

Sense

and

Driver

VDD2

High

Voltage

Level

Translator

Linear

Reg

Current

Sense

and

Driver

VPP1

VPSEN

VPGATE

VPP2

HVOUT

PGND

VNN2

VNGATE

VNSEN

VNN1

Input3+ Input3-

Output3

● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com

Share Link: