HV441 Datasheet, PDF (1/7 Pages) Supertex, Inc – High-Voltage Ring Generator

HV441
High-Voltage Ring Generator
Ordering Information
Operating Voltage
V_PP1 - V_NN1
220V
Package Options
44-Pin PLCC
HV441PJ
Features
❏ 220V maximum operating voltage
❏ Integrated high voltage transistors
❏ Up to 70 V_RMS 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
❏ Fiber in the loop/to the curb
❏ Coax cable loop
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.
Absolute Maximum Ratings
V_PP1 - V_NN1, power supply voltage
V_PP1, positive high voltage supply
V_PP2, positive gate voltage supply
V_NN1, negative high voltage supply
V_NN2, negative gate voltage supply
V_DD1, low voltage logic supply
V_DD2, low voltage analog/logic supply
Storage temperature
Power dissipation
+240V
+120V
+120V
-170V
-170V
+7.5V
+18V
-65°C to +150°C
1200mW
For detailed circuit and application information, please
refer to application not AN-H35.
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 s₁pecifications 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.