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
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.
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
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 specifications are subject to change without notice. For the latest product specifications, refer to the
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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.
HV441
Electrical Characteristics
(Over operating supply voltage unless otherwise specified, T
A
= 25°C.)
Symbol Parameters
Min
Typ
Max
Unit
Conditions
High Voltage Output
R
SOURCE
R
SINK
DC
P
DC
N
td
(ON)
t
rise
td
(OFF)
t
fall
V
psen
V
nsen
t
shortP
t
shortN
V
OUT
P source resistance
V
OUT
P sink resistance
Max P-Channel duty cycle
Max N-Channel duty cycle
HV
OUT
delay time
HV
OUT
rise time
HV
OUT
delay time
HV
OUT
fall time
HV
OUT
current source sense voltage
HV
OUT
current sink sense voltage
HV
OUT
off delay time when current
source sense is activated
HV
OUT
off delay time when current
sink sense is activated
V
PP1
– 0.75
V
PP1
– 0.67
V
NN1
+ 0.75
V
NN1
+ 0.65
V
NN1
+ 1.00
V
PP1
– 1.00
200
50
V
PP1
– 1.25
V
PP1
– 1.31
V
NN1
+ 1.25
V
NN1
+ 1.33
100
100
92
94
150
50
55
55
Ω
Ω
%
%
ns
ns
ns
ns
V
I
OUT
= 100mA
I
OUT
= -100mA
V
PP1
= +60V, V
NN1
= -160V
V
PP1
= +60V, V
NN1
= -160V
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
V
ns
ns
Operational Amplifier 1, 2, and 3
Symbol Parameters
V
OS
I
IN
V
IN
V
OUT
I
SOURCE
I
SINK
A
O
BW
SR
Input offset voltage
Input bias current
Input voltage range
Output voltage swing
Output source current
Output sink current
DC open loop gain
Bandwidth
Output slew rate
70
100
0.3
85
1
0.5
Min
Typ
Max
5
500
V
DD2
– 1
V
DD2
– 1
3
-2.75
Unit
mV
nA
V
V
mA
mA
dB
KHz
V/µs
Conditions
Comparator
Symbol Parameters
V
OS
I
IN
V
IN
A
V
t
res
Input offset voltage
Input bias current
Input voltage range
Voltage gain
Response time
80
80
Min
Typ
Max
4
500
V
DD2
– 2
Unit
mV
nA
V
dB
ns
Conditions
Oscillator
Symbol Parameters
V
osc1
V
osc2
V
oscin
f
oscout
V
oscout
Input voltage range for osc1
Input voltage range for osc2
Input voltage range for oscin
Output frequency of oscout
Oscout voltage
0
Min
0
0
0
Typ
Max
V
DD2
V
DD2
V
DD1
120
V
DD1
Unit
V
V
V
KHz
V
f
OSC1
= 480KHz
Conditions
2
HV441
Electrical Characteristics, cont’d.
(Over operating supply voltage unless otherwise specified, T
A
= 25°C.)
Symbol
V
PP1
V
PP2
V
NN1
V
NN2
V
DD1
V
DD2
I
PP1Q
I
NN1Q
I
PP1
I
NN1
I
DD1Q
I
DD2Q
Parameters
High voltage positive supply
Positive charge pump output voltage
High voltage negative supply
Negative charge pump output voltage
Low voltage supply
Low voltage supply
V
PP1
quiescent current
V
NN1
quiescent current
V
PP1
operating current
V
NN1
operating current
V
DD1
quiescent current
V
DD2
quiescent current
Min
15
V
PP1
– 8
V
PP
– 220
V
NN1
+ 5.2
3.0
10.8
250
250
Typ
Max
110
V
PP1
– 19
-110
V
NN1
+10.5
5.5
13.5
400
500
0.8
1.0
10
4.0
Unit
V
V
V
V
V
V
µA
µA
mA
mA
µA
mA
Conditions
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
HV
OUT
switching at 100KHz,
V
PP1
= +60V, V
NN1
= -160V,
T A = -40°C to +85°C
Pin Description
V
PP1
V
PP2
V
NN1
V
NN2
V
DD1
V
DD2
GND
P
GND
Input1-
Input1+
Output1
Input2-
Input2+
Output2
Input3-
Input3+
Output3
V
ref
On/Off
osc1
osc2
oscin
oscout
HV
OUT
V
psen
V
nsen
P
gate
Ngate
Positive high voltage supply
Positive gate voltage supply. Generated by an internal linear regulator.
Negative high voltage supply
Negative gate voltage supply. Generated by an internal linear regulator.
+3.3V to 5.0V supply for input and output logic
+12V supply for analog/logic circuit
Low voltage ground
High voltage power ground
Inverting input of op-amp 1.
Noninverting input of op-amp 1.
Output of op-amp 1.
Inverting input of op-amp 2.
Noninverting input of op-amp 2.
Output of op-amp 2.
Inverting input of op-amp 3.
Noninverting input of op-amp 3.
Output of op-amp 3.
External input reference voltage for zero crossing detection.
Enables/Disables HV
OUT
.
Input 1 for external resonator. Connect to GND when not in use.
Input 2 for external resonator. Leave floating when not in use.
External oscillator input. Zero to V
DD1
input signal. Connect to V
DD1
when not in use.
Oscillator output; 1/4 frequency of external resonator. 50% duty cycle.
High voltage output. Voltage swings from V
PP1
to V
NN1
.
Pulse by pulse over current sensing for internal P-Channel MOSFET.
Pulse by pulse over current sensing for internal N-Channel MOSFET.
Gate drive for external P-channel MOSFET.
Gate drive for external N-channel MOSFET.
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