1

Absolute Maximum Ratings

+240V

+120V

+120V

-170V

-170V

+7.5V

+18V

Storage temperature

-65°C to +150°C

Power dissipation

1200mW

Operating Voltage

Package Options

V

44-Pin PLCC

220V

HV441PJ

General Description

The Supertex HV441 is a monolithic integrated circuit capable of

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

15Hz 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 sine

wave and the DC offset voltage are adjustable.

Ordering Information

High-Voltage Ring Generator

Applications

❏ Stand alone high voltage ring generator

❏ Set-top/Street box ring generator

❏ Pair gain ring generator

❏ Wireless local loops

❏ Fiber in the loop/to the curb

❏ Coax cable loop

For detailed circuit and application information, please

refer to application not AN-H35.

HV441

Features

❏ 220V maximum operating voltage

❏ Integrated high voltage transistors

❏ Up to 70 V

❏ 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

12/13/01

Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability

indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to

workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the

Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.