HV440_14 Datasheet, PDF (1/6 Pages) Supertex, Inc – High Voltage Ring Generator IC

Supertex inc.
HV440
High Voltage
Ring Generator IC
Features
►► 220V maximum operating voltage
►► Integrated high voltage transistors
►► Up to 70V_RMS 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
V_DD
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