HV441
High-Voltage Ring Generator
Ordering Information
Operating Voltage
Package Options
VPP1 - VNN1
44-Pin PLCC
220V
HV441PJ
Features
General Description
❏ 220V maximum operating voltage
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.
❏ Integrated high voltage transistors
❏ Up to 70 VRMS 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
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.
❏ 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
Absolute Maximum Ratings
VPP1 - VNN1, power supply voltage
+240V
VPP1, positive high voltage supply
+120V
VPP2, positive gate voltage supply
+120V
VNN1, negative high voltage supply
-170V
VNN2, negative gate voltage supply
-170V
VDD1, low voltage logic supply
+7.5V
VDD2, low voltage analog/logic supply
+18V
Storage temperature
Power dissipation
-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
1
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, TA = 25°C.)
Symbol Parameters
Min
Typ
Max
Unit
Conditions
High Voltage Output
RSOURCE
VOUTP source resistance
55
Ω
IOUT = 100mA
RSINK
VOUTP sink resistance
55
Ω
IOUT = -100mA
DCP
Max P-Channel duty cycle
92
%
VPP1 = +60V, VNN1 = -160V
DCN
Max N-Channel duty cycle
94
%
VPP1 = +60V, VNN1 = -160V
td(ON)
HVOUT delay time
trise
HVOUT rise time
td(OFF)
HVOUT delay time
tfall
HVOUT fall time
Vpsen
HVOUT current source sense voltage
150
50
200
VPP1 – 0.75
VPP1 – 1.00
HVOUT current sink sense voltage
VNN1 + 0.75
VPP1 – 1.25
VPP1 – 1.31
VNN1 + 1.00
VNN1 + 0.65
ns
ns
50
VPP1 – 0.67
Vnsen
ns
VNN1 + 1.25
VNN1 + 1.33
ns
V
V
tshortP
HVOUT off delay time when current
source sense is activated
100
ns
tshortN
HVOUT off delay time when current
sink sense is activated
100
ns
Max
Unit
TA = -40°C to +85°C
TA = -40°C to +85°C
Operational Amplifier 1, 2, and 3
Symbol Parameters
Min
Typ
VOS
Input offset voltage
5
mV
IIN
Input bias current
VIN
Input voltage range
VOUT
Output voltage swing
ISOURCE
Output source current
ISINK
Output sink current
AO
DC open loop gain
70
BW
Bandwidth
100
KHz
SR
Output slew rate
0.3
V/µs
500
nA
1
VDD2 – 1
V
0.5
VDD2 – 1
V
3
mA
-2.75
mA
85
Conditions
dB
Comparator
Symbol Parameters
VOS
Input offset voltage
IIN
Input bias current
VIN
Input voltage range
AV
Voltage gain
tres
Response time
Min
Typ
Max
Unit
4
mV
500
nA
VDD2 – 2
V
80
Conditions
dB
80
ns
Oscillator
Symbol Parameters
Min
Typ
Max
Unit
Vosc1
Input voltage range for osc1
0
VDD2
V
Vosc2
Input voltage range for osc2
0
VDD2
V
Voscin
Input voltage range for oscin
0
VDD1
V
foscout
Output frequency of oscout
120
KHz
Voscout
Oscout voltage
VDD1
V
0
2
Conditions
fOSC1 = 480KHz
HV441
Electrical Characteristics, cont’d.
(Over operating supply voltage unless otherwise specified, TA = 25°C.)
Symbol
Parameters
VPP1
High voltage positive supply
VPP2
Positive charge pump output voltage
VNN1
Min
Typ
Max
Unit
15
110
V
TA = -40°C to +85°C
VPP1 – 8
VPP1 – 19
V
TA = -40°C to +85°C
High voltage negative supply
VPP – 220
-110
V
TA = -40°C to +85°C
VNN2
Negative charge pump output voltage
VNN1 + 5.2
VNN1 +10.5
V
TA = -40°C to +85°C
VDD1
Low voltage supply
3.0
5.5
V
TA = -40°C to +85°C
VDD2
Low voltage supply
10.8
13.5
V
TA = -40°C to +85°C
IPP1Q
VPP1 quiescent current
250
400
µA
TA = -40°C to +85°C
INN1Q
VNN1 quiescent current
250
500
µA
TA = -40°C to +85°C
IPP1
VPP1 operating current
0.8
mA
INN1
VNN1 operating current
1.0
mA
IDD1Q
VDD1 quiescent current
10
µA
IDD2Q
VDD2 quiescent current
4.0
mA
Pin Description
VPP1
Positive high voltage supply
VPP2
Positive gate voltage supply. Generated by an internal linear regulator.
VNN1
Negative high voltage supply
VNN2
Negative gate voltage supply. Generated by an internal linear regulator.
VDD1
+3.3V to 5.0V supply for input and output logic
VDD2
+12V supply for analog/logic circuit
GND
Low voltage ground
PGND
High voltage power ground
Input1-
Inverting input of op-amp 1.
Input1+
Noninverting input of op-amp 1.
Output1
Output of op-amp 1.
Input2-
Inverting input of op-amp 2.
Input2+
Noninverting input of op-amp 2.
Output2
Output of op-amp 2.
Input3-
Inverting input of op-amp 3.
Input3+
Noninverting input of op-amp 3.
Output3
Output of op-amp 3.
Vref
External input reference voltage for zero crossing detection.
On/Off
Enables/Disables HVOUT.
osc1
Input 1 for external resonator. Connect to GND when not in use.
osc2
Input 2 for external resonator. Leave floating when not in use.
oscin
External oscillator input. Zero to VDD1 input signal. Connect to VDD1 when not in use.
oscout
Oscillator output; 1/4 frequency of external resonator. 50% duty cycle.
HVOUT
High voltage output. Voltage swings from VPP1 to VNN1.
Vpsen
Pulse by pulse over current sensing for internal P-Channel MOSFET.
Vnsen
Pulse by pulse over current sensing for internal N-Channel MOSFET.
Pgate
Gate drive for external P-channel MOSFET.
Ngate
Gate drive for external N-channel MOSFET.
3
Conditions
HVOUT switching at 100KHz,
VPP1 = +60V, VNN1 = -160V,
T A = -40°C to +85°C
HV441
Functional Block Diagram
VDD2
Output2
Input2-
VPP1
VDD2
Input2+
Output1
op-amp2
+
+
–
Input1+
osc2
osc in
Pulse Width
Regulator
High
Voltage
Level
Translator
VDD2
Input1-
VREF
ON/OFF
VDD1
osc1
Current
Sense
and
Driver
+
op-amp1 comp
Zero Voltage
Crossing
Detection
VDD1
÷4
High
Voltage
Level
Translator
VDD2
+
–
osc out
VPP2
PGND
VDD2
Ramp
Generator
op-amp3
Vpgate
Linear
Reg
HVOUT
VDD2
OSC
Vpsen
Linear
Reg
VNN2
Vngate
Current
Sense
and
Driver
Vnsen
GND
VNN1
Input3+
Input3-
Output3
4
On = 5V
Off = 0V
39nF
39nF
205K
205K
5
osc in
–
+
VDD2
op-amp2
GND
osc out
158K
VDD1
osc2 OSC
12V
12V
Input3-
–
+
Input3-
op-amp3
Ramp
Generator
VDD2
Zero Voltage
Crossing
Detection
VDD2
VDD2
Pulse Width
Regulator
VDD2
Output2
45.3K 205K
÷4
op-amp1 comp
Input1+
+
–
Input1-
Output1
+
-
Input2-
8.2K 8.2nF
Input2+
VREF
5.0V VDD1
≈400KHz osc1
15K
21K
10.7K
25.5K
Output3
High
Voltage
Level
Translator
High
Voltage
Level
Translator
1M
Linear
Reg
VDD2
Linear
Reg
Current
Sense
and
Driver
Current
Sense
and
Driver
HVOUT
4.3Ω
Vnsen
Vngate
VNN2
PGND
VPP2
Vpgate
Vpsen
4.3Ω
BAS21
BAS21
1.5mH
VNN1 = -160V
0.1µF
25V
0.1µF
VPP1 = +60V
Sine Wave
Ring Output,
20Hz
0.22µF
HV441
Typical 5 REN Application Circuit
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HV441
Typical 20 REN Application Circuit
HV441
Pin Configuration
HV441
Pin Function
1
N/C
2
N/C
3
N/C
4
Vref
5
N/C
6
VDD2
7
N/C
8
VDD1
9
osc1
10 osc2
11
oscin
12 oscout
13 ON/OFF
14 N/C
15 N/C
16 N/C
17 VNN1
18 N/C
19 VNN2
20 Ngate
21 Vnsen
22 N/C
Package Outline
Pin
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
39 38 37 36 35 34 33 32 31 30 29
Function
HVOUT
N/C
Vpsen
Pgate
VPP2
N/C
VPP1
N/C
N/C
N/C
PGND
GND
Output2
Input2Input2+
Output1
Input1Input1+
Output3
Input3Input3+
N/C
40
28
41
27
42
26
43
25
44
24
1
23
2
22
3
21
4
20
5
19
6
18
7
8
9 10 11 12 13 14 15 16 17
top view
44-pin PLCC
12/13/010
©2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.
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TEL: (408) 744-0100 • FAX: (408) 222-4895
www.supertex.com