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PDF HV440WG Data sheet ( Hoja de datos )
| Número de pieza | HV440WG | |
| Descripción | High Voltage Ring Generator IC | |
| Fabricantes | Supertex Inc | |
| Logotipo |  |
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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
1 page  
HV440
Pin Description
Pin Name Description
1 VPP1 Positive high voltage supply.
2 PGND High voltage power ground.
3 GND Low voltage ground.
4
MODE
Logic mode input. Logic low activates 200nsec deadband. When mode is low, NIN turns on and off
the high voltage N- and P-Channels. Pin is not used and should be connected to VDD or ground.
5 PIN Logic control input. When mode is high, logic input high turns off output high voltage P-Channel.
6 NIN Logic control input. When mode is high, logic input high turns on output high voltage N-Channel.
7 EN Active low enable input.
8 VDD Logic supply voltage.
9 VNN1 Negative high voltage supply.
10
VNN2
Negative gate voltage supply. Generated by an internal linear regulator. A 0.1µF capacitor should
be connected between VNN2 and VNN1.
11 NGATE Gate drive for external N-channel MOSFET.
12 VNSEN Pulse by pulse over current sensing for internal N-Channel MOSFET.
13 HVOUT High voltage output. Voltage swings from VPP1 to VNN1.
14 VPSEN Pulse by pulse over current sensing for internal P-Channel MOSFET.
15 PGATE Gate drive for external P-channel MOSFET.
16
VPP2
Positive gate voltage supply. Generated by an internal linear regulator. A 0.1µF capacitor should
be connected between VPP2 and VPP1.
Doc.# DSFP - HV440
C031414
Supertex inc.
5 www.supertex.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet HV440WG.PDF ] | |
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