TI TL783CKC

TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
D
D
D
D
D
D
D
Output Adjustable From 1.25 V to 125 V
When Used With an External Resistor
Divider
700-mA Output Current
Full Short-Circuit, Safe-Operating-Area, and
Thermal Shutdown Protection
0.001%/V Typical Input Voltage Regulation
0.15% Typical Output Voltage Regulation
76-dB Typical Ripple Rejection
Standard TO-220AB Package
KC PACKAGE
(TOP VIEW)
IN
OUT
ADJ
The output terminal is in electrical
contact with the mounting base.
TO-220AB
I
O
A
description
The TL783C is an adjustable three-terminal highvoltage regulator with an output range of 1.25 V to
125 V and a DMOS output transistor capable of
sourcing more than 700 mA. It is designed for use
in high-voltage applications where standard
bipolar regulators cannot be used. Excellent performance specifications, superior to those of most bipolar
regulators, are achieved through circuit design and advanced layout techniques.
As a state-of-the-art regulator, the TL783C combines standard bipolar circuitry with high-voltage
double-diffused MOS transistors on one chip to yield a device capable of withstanding voltages far higher than
standard bipolar integrated circuits. Because of its lack of secondary breakdown and thermal runaway
characteristics usually associated with bipolar outputs, the TL783C maintains full overload protection while
operating at up to 125 V from input to output. Other features of the device include current limiting,
safe-operating-area (SOA) protection, and thermal shutdown. Even if ADJ is inadvertently disconnected, the
protection circuitry remains functional.
Only two external resistors are required to program the output voltage. An input bypass capacitor is necessary
only when the regulator is situated far from the input filter. An output capacitor, although not required, improves
transient response and protection from instantaneous output short circuits. Excellent ripple rejection can be
achieved without a bypass capacitor at the adjustment terminal.
AVAILABLE OPTIONS
PACKAGED DEVICE
TJ
HEAT-SINK MOUNTED
(3-PIN)
(KC)
0°C to 125°C
TL783CKC
CHIP
FORM
(Y)
TL783Y
Copyright  1997, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
TL783Y chip information
This chip, when properly assembled, displays characteristics similar to those of the TL783C. Thermal
compression or ultrasonic bonding may be used on the doped aluminum bonding pads. The chip may be
mounted with conductive epoxy or a gold-silicon preform.
BONDING PAD ASSIGNMENTS
(2)
(1)
(3)
IN
(2), (4)
TL783Y
OUT
(1)
ADJ
(3)
102
CHIP THICKNESS: 15 MILS TYPICAL
BONDING PADS: 4 × 4 MILS MINIMUM
TJmax = 150°C
TOLERANCES ARE ± 10%
ALL DIMENSIONS ARE IN MILS
OUTPUT TERMINAL MUST BE
BONDED TO BOTH 2 AND 4
(4)
74
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
functional block diagram
VI
–
IN
Error
Amplifier
V
O
≈ V
ref
ǒ) Ǔ
R2
R1
1
+
VO
Protection
Circuit
OUT
R1
Vref
ADJ
R2
absolute maximum ratings over operating temperature range (unless otherwise noted)†
Input-to-output differential voltage, Vl – VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 V
Continuous total power dissipation at (or below) TA = 25°C (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . 2 W
Continuous total power dissipation at (or below) TC = 70°C (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . 20 W
Operating free-air, TA, case, TC, or virtual junction, TJ, temperature range . . . . . . . . . . . . . . . . . 0°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: For operation above TA = 25°C or TC = 70°C, refer to Figures 1 and 2, respectively. To avoid exceeding the design maximum virtual
junction temperature, these ratings should not be exceeded. Due to variations in individual device electrical characteristics and thermal
resistance, the built-in thermal overload protection may be activated at power levels slightly above or below the rated dissipation
CASE TEMPERATURE
DISSIPATION DERATING CURVE
24
2000
Maximum Continuous Power Dissipation – W
Maximum Continuous Power Dissipation – mW
FREE-AIR TEMPERATURE
DISSIPATION DERATING CURVE
Derating Factor = 16 mW/°C
RθJA ≈ 62.5°C/W
1800
1600
1400
1200
1000
800
600
400
200
0
25
50
75
100
125
150
20
16
12
8
4
Derating Factor = 250 mW/°C
Above 70°C
RθJC ≈ 4°C/W
0
25
50
75
100
125
150
TC – Case Temperature – °C
TA – Free-Air Temperature – °C
Figure 1
Figure 2
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3
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
recommended operating conditions
MIN
MAX
UNIT
125
V
15
700
mA
0
125
°C
Input-to-output voltage differential, VI – VO
Output current, IO
Operating virtual junction temperature, TJ
electrical characteristics at Vl – VO = 25 V, IO = 0.5 A, TJ = 0°C to 125°C (unless otherwise noted)
TL783C
TEST CONDITIONS†
PARAMETER
MIN
Input voltage regulation‡
VI – VO = 20 V to 125 V
V,
P ≤ rated dissipation
TJ = 25°C
TJ = 0°C to 125°C
Ripple rejection
∆VI(PP) = 10 V,
VO = 10 V,
f = 120 Hz
TJ = 25°C
VO ≤ 5 V
VO ≥ 5 V
P ≤ rated dissipation
VO ≤ 5 V
VO ≥ 5 V
IO = 15 mA to 700 mA,
mA
O
l
l i
Output
voltage
regulation
IO = 15 mA to 700 mA,
mA
66
Output voltage change with
temperature
TYP
MAX
0.001
0.01
0.004
0.02
76
%/ V
dB
7.5
25
0.15%
0.5%
20
70
0.3%
1.5%
mV
mV
0.4%
Output voltage long-term
1000 hours at TJ = 125°C,
drift
VI – VO = 125 V,
Output noise voltage
TJ = 25°C
f = 10 Hz to 10 kHz,
See Note 2
0.2%
0.003%
Minimum output current to
VI – VO = 125 V
maintain regulation
P k output current
Peak
UNIT
15
VI – VO = 25 V,
VI – VO = 15 V,
t = 1 ms
VI – VO = 25 V,
VI – VO = 125 V,
t = 30 ms
700
900
t = 30 ms
100
250
1100
t = 30 ms
715
Input current at ADJ
Change in input current at
VI – VO = 15 V to 125 V,
ADJ
mA
IO = 15 mA to 700 mA, P ≤ rated dissipation
A
mA
83
110
µA
0.5
5
µA
Reference voltage
VI – VO = 10 V to 125 V,
IO = 15 mA to 700 mA, P ≤ rated dissipation,
1.2
1.27
1.3
V
(OUT to ADJ)
See Note 3
† Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into
account separately.
‡ Input voltage regulation is expressed here as the percentage change in output voltage per 1-V change at the input.
NOTES: 2. Since long-term drift cannot be measured on the individual devices prior to shipment, this specification is not intended to be a
guarantee or warranty. It is an engineering estimate of the average drift to be expected from lot to lot.
3. Due to the dropout voltage and output current-limiting characteristics of this device, output current is limited to less than 700 mA
at input-to-output voltage differentials of less than 25 V.
4
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• DALLAS, TEXAS 75265
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
electrical characteristics at Vl – VO = 25 V, IO = 0.5 A, TJ = 25°C (unless otherwise noted)
TL783Y
TEST CONDITIONS†
PARAMETER
Input voltage regulation‡
VI – VO = 20 V to 125 V,
P ≤ rated dissipation
Ripple rejection
∆VI(PP) = 10 V,
VO = 10 V,
IO = 15 mA to 700 mA
O
Output
voltage
l
regulation
l i
IO = 15 mA to 700 mA,
mA
P ≤ rated dissipation
MIN
0.001
P k output current
Peak
UNIT
%/ V
76
dB
VO ≤ 5 V
VO ≥ 5 V
7.5
mV
0.15%
VO ≤ 5 V
VO ≥ 5 V
20
mV
0.3%
0.4%
f = 10 Hz to 10 kHz
0.003%
VI – VO = 25 V,
VI – VO = 15 V,
t = 1 ms
1100
t = 30 ms
715
VI – VO = 25 V,
VI – VO = 125 V,
t = 30 ms
900
t = 30 ms
250
Adjustment-terminal current
Change in adjustmentterminal current
MAX
f = 120 Hz
Output voltage change with
temperature
Output noise voltage
TYP
VI – VO = 15 V to 125 V,
IO = 15 mA to 700 mA, P ≤ rated dissipation
A
mA
83
µA
0.5
µA
Reference voltage
VI – VO = 10 V to 125 V, IO = 15 mA to 700 mA, P ≤ rated dissipation,
1.27
V
(OUT to ADJ)
See Note 3
† Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into
account separately.
‡ Input voltage regulation is expressed here as the percentage change in output voltage per 1-V change at the input.
NOTES: 2 Since long-term drift cannot be measured on the individual devices prior to shipment, this specification is not intended to be a
guarantee or warranty. It is an engineering estimate of the average drift to be expected from lot to lot.
3 Due to the dropout voltage and output current-limiting characteristics of this device, output current is limited to less than 700 mA
at input-to-output voltage differentials of less than 25 V.
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5
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
TYPICAL CHARACTERISTICS
OUTPUT CURRENT LIMIT
vs
INPUT-TO-OUTPUT VOLTAGE DIFFERENTIAL
ÎÎÎÎ
ÎÎÎÎ
2
ÎÎÎÎÎ
ÎÎÎÎÎ
2
tw = 1 ms
1.6
1.6
1.4
ÎÎÎÎ
ÎÎÎÎ
1.2
TC = 0°C
1
ÎÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
0.8
0.6
TC = 25°C
0.4
tw = 30 ms
1.8
Output Current Limit – A
1.8
Output Current Limit – A
OUTPUT CURRENT LIMIT
vs
INPUT-TO-OUTPUT VOLTAGE DIFFERENTIAL
1.4
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎÎ
1.2
TC = 0°C
1
0.8
TC = 25°C
0.6
0.4
TC = 125°C
0.2
0
0
25
50
75
TC = 125°C
0.2
0
100
125
0
VI – VO – Input-to-Output Voltage Differential – V
25
50
Figure 4
OUTPUT CURRENT LIMIT
vs
TIME
ÎÎÎÎÎ
ÎÎÎÎÎ
1.2
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
120
VI(AV) – VO = 25 V
∆VI(PP) = 10 V
IO = 100 mA
f = 120 Hz
Co = 0
TJ = 25°C
100
Ripple Rejection – dB
Output Current Limit – A
RIPPLE REJECTION
vs
OUTPUT VOLTAGE
VI – VO = 25 V
TC = 25°C
1.4
1
0.8
0.6
80
60
40
0.4
20
0.2
0
0
0
10
20
30
40
0
10
Time – ms
20
30
40
50
60
70
VO – Output Voltage – V
Figure 5
6
125
100
VI – VO – Input-to-Output Voltage Differential – V
Figure 3
1.6
75
Figure 6
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• DALLAS, TEXAS 75265
80
90
100
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
TYPICAL CHARACTERISTICS
RIPPLE REJECTION
vs
FREQUENCY
RIPPLE REJECTION
vs
OUTPUT CURRENT
100
90
100
Ripple Rejection – dB
Ripple Rejection – dB
80
80
60
ÎÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ
VI(AV) = 25 V
∆VI(PP) = 10 V
VO = 10 V
f = 120 Hz
20 Co = 0
TJ = 25°C
0
0
100 200 300
40
70
60
50
40
10
500
600
700
Co = 10 µF
Co = 0
30
20
400
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ ÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ
0
0.01
800
VI(AV) = 25 V
∆VI(PP) = 10 V
VO = 10 V
IO = 500 mA
TJ = 25°C
0.1
1
IO – Output Current – mA
1000
Figure 8
REFERENCE VOLTAGE
vs
VIRTUAL JUNCTION TEMPERATURE
OUTPUT IMPEDANCE
vs
FREQUENCY
ÎÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ
102
1.30
VI = 35 V
VO = 10 V
IO = 500 mA
TJ = 25°C
1.29
V ref – Reference Voltage – V
Zo – Output Impedance – Ω
100
f – Frequency – kHz
Figure 7
101
10
1
10–1
10–2
1.28
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
VI = 20 V
IO = 15 mA
1.27
1.26
1.25
1.24
10–3
1.23
10–4
101
102
103
104
105
106
107
f – Frequency – kHz
1.22
–75 –50 –25
0
25
50
75 100 125 150 175
TJ – Virtual Junction Temperature – °C
Figure 9
Figure 10
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7
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
TYPICAL CHARACTERISTICS
INPUT CURRENT AT ADJ
vs
VIRTUAL JUNCTION TEMPERATURE
DROPOUT VOLTAGE
vs
VIRTUAL JUNCTION TEMPERATURE
25
90
∆VO = 100 mV
VI = 25 V
VO = Vref
IO = 500 mA
20
Dropout Voltage – V
Input Current at ADJ – µ A
88
86
84
82
80
0
25
50
75
100
125
15
IO = 700 mA
IO = 600 mA
IO = 500 mA
10
5
IO = 250 mA
IO = 100 mA
IO = 15 mA
0
–75
–50
–25
50
75
100
125
Figure 12
Figure 11
OUTPUT CURRENT†
vs
INPUT VOLTAGE
OUTPUT VOLTAGE DEVIATION
vs
VIRTUAL JUNCTION TEMPERATURE
0
12
VI = 25 V
VO = 5 V
IO = 15 mA to 700 mA
TC = 0°C
10
–0.1
I O – Output Current – mA
∆VO – Output Voltage Deviation – %
25
TJ – Virtual Junction Temperature – °C
TJ – Virtual Junction Temperature – °C
–0.2
–0.3
–0.4
8
TC = 25°C
6
TC = 125°C
4
2
0
–0.5
0
25
50
75
100
125
150
TJ – Virtual Junction Temperature – °C
0
25
50
Figure 14
POST OFFICE BOX 655303
75
100
125
VI – Input Voltage – V
† This is the minimum current required to maintain voltage
regulation.
Figure 13
8
0
• DALLAS, TEXAS 75265
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
LINE TRANSIENT RESPONSE
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
∆ VO – Output Voltage Deviation – V
∆ VO – Output Voltage Deviation – V
TYPICAL CHARACTERISTICS
TJ = 25°C
0.4
0.2
0
Co = 0
Co = 10 µF
–0.2
LOAD TRANSIENT RESPONSE
6
4
2
0
–2
–4
–6
1
0.5
0
0
1
2
3
4
Time – µs
I O – Output Current – A
Change in Input Voltage – V
0.8
VI = 35 V
VO = 10 V
Co = 1 µF
TJ = 25°C
0.6
0.4
0.2
0
0
40
80
120
160
200
240
Time – µs
Figure 16
Figure 15
DESIGN CONSIDERATIONS
The internal reference (see functional block diagram) generates 1.25 V nominal (Vref) between OUT and ADJ.
This voltage is developed across R1 and causes a constant current to flow through R1 and the programming
resistor R2, giving an output voltage of:
VO = Vref (1 + R2/R1) + lI(ADJ) (R2)
or
VO ~ Vref (1 + R2/R1).
The TL783C was designed to minimize the input current at ADJ and maintain consistency over line and load
variations, thereby minimizing the associated (R2) error term.
To maintain II(ADJ) at a low level, all quiescent operating current is returned to the output terminal. This quiescent
current must be sunk by the external load and is the minimum load current necessary to prevent the output from
rising. The recommended R1 value of 82 Ω provides a minimum load current of 15 mA. Larger values can be
used when the input-to-output differential voltage is less than 125 V (see output current curve, Figure 14) or
when the load sinks some portion of the minimum current.
bypass capacitors
The TL783C regulator is stable without bypass capacitors; however, any regulator becomes unstable with
certain values of output capacitance if an input capacitor is not used. Therefore, the use of input bypassing is
recommended whenever the regulator is located more than four inches from the power-supply filter capacitor.
A 1-µF tantalum or aluminum electrolytic capacitor is usually sufficient.
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9
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
DESIGN CONSIDERATIONS
bypass capacitors (continued)
Adjustment-terminal capacitors are not recommended for use on the TL783C because they can seriously
degrade load transient response as well as create a need for extra protection circuitry. Excellent ripple rejection
is presently achieved without this added capacitor.
Due to the relatively low gain of the MOS output stage, output voltage dropout may occur under large load
transient conditions. The addition of an output bypass capacitor greatly enhances load transient response as
well as prevents dropout. For most applications, it is recommended that an output bypass capacitor be used
with a minimum value of:
Co (µF) = 15/VO
Larger values provide proportionally better transient response characteristics.
protection circuitry
The TL783C regulator includes built-in protection circuits capable of guarding the device against most overload
conditions encountered in normal operation. These protective features are current limiting, safe-operating-area
protection, and thermal shutdown. These circuits protect the device under occasional fault conditions only.
Continuous operation in the current limit or thermal shutdown mode is not recommended.
The internal protection circuits of the TL783C protect the device up to maximum-rated VI as long as certain
precautions are taken. If Vl is instantaneously switched on, transients exceeding maximum input ratings may
occur, which can destroy the regulator. These are usually caused by lead inductance and bypass capacitors
causing a ringing voltage on the input. In addition, when rise times in excess of 10 V/ns are applied to the input,
a parasitic npn transistor in parallel with the DMOS output can be turned on causing the device to fail. If the
device is operated over 50 V and the input is switched on rather than ramped on, a low-Q capacitor, such as
tantalum or aluminum electrolytic should be used rather than ceramic, paper, or plastic bypass capacitors. A
Q factor of 0.015 or greater usually provides adequate damping to suppress ringing. Normally, no problems
occur if the input voltage is allowed to ramp upward through the action of an ac line rectifier and filter network.
Similarly, when an instantaneous short circuit is applied to the output, both ringing and excessive fall times can
result. A tantalum or aluminum electrolytic bypass capacitor is recommended to eliminate this problem.
However, if a large output capacitor is used and the input is shorted, addition of a protection diode may be
necessary to prevent capacitor discharge through the regulator. The amount of discharge current delivered is
dependent on output voltage, size of capacitor, and fall time of Vl. A protective diode (see Figure 17) is required
only for capacitance values greater than:
Co (µF) = 3 x 104/(VO)2
Care should always be taken to prevent insertion of regulators into a socket with power on. Power should be
turned off before removing or inserting regulators.
10
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TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
DESIGN CONSIDERATIONS
protection circuitry (continued)
TL783C
VI
IN
OUT
VO
ADJ
R1
Co
R2
Figure 17. Regulator With Protective Diode
load regulation
The current set resistor (R1) should be located close to the regulator output terminal rather than near the load.
This eliminates long line drops from being amplified through the action of R1 and R2 to degrade load regulation.
To provide remote ground sensing, R2 should be near the load ground.
TL783C
VI
IN
VO
Rline
OUT
ADJ
RL
R1
R2
Figure 18. Regulator With Current-Set Resistor
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11
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
APPLICATION INFORMATION
VI = 145 to 200 V
V
TL783C
VI = 125 V
IN
O
ǒ Ǔ
+ Vref 1 )
TIP150
OUT
ADJ
120 V, 1.5 W
IN
R1
82 Ω
OUT
+
+
1 µF †
7.5 kΩ, 1 W
R2
R1
ADJ
10 µF
0.1 µF
TL783C
125 V
R1
82 Ω
R2
0 to 8 kΩ
+
10 µF
R2
8.2 kΩ, 2W
† Needed if device is more than 4 inches from filter capacitor
Figure 19. 1.25-V to 115-V Adjustable Regulator
Figure 20. 125-V Short-Circuit-Protected Off-Line
Regulator
125 V
1Ω
VI = 70 to 125 V
10 Ω
10 Ω
TIP30C
TIPL762
1 kΩ
TL783C
TL783C
10 kΩ
IN
VO = 50 V
at 0.5 A
OUT
ADJ
10 kΩ
IN
OUT
ADJ
82 Ω
+
50 µF
3.3 kΩ, 1W
R1
82 Ω
V
+
O
ǒ Ǔ
+ Vref 1 ) R2
R1
50 µF
R2
Figure 21. 50-V Regulator With Current Boost
12
TIPL762
1 kΩ
POST OFFICE BOX 655303
Figure 22. Adjustable Regulator With Current
Boost and Current Limit
• DALLAS, TEXAS 75265
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
APPLICATION INFORMATION
VI
VI
Load
+ VRref
I
TL783C
1 µF
IN
OUT
ADJ
TL783C
R
IN
OUT
I
ADJ
R
+ VRref
Load
Figure 23. Current-Sinking Regulator
Figure 24. Current-Sourcing Regulator
VI = 90 V
VCC
TL783C
IN
TL783C
1 µF
OUT
IN
ADJ
6.25 Ω
OUT
ADJ
OUTPUT
82 Ω
TL783C
IN
OUT
R2
V+
ADJ
82 Ω
48 V
–
+
INPUT
TL081
V
V–
OFFSET
ǒ Ǔ
3.9 kΩ
+ Vref I ) R2
82
Figure 25. High-Voltage Unity-Gain Offset Amplifier
POST OFFICE BOX 655303
Figure 26. 48-V, 200-mA Float Charger
• DALLAS, TEXAS 75265
13
TL783C, TL783Y
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036C – SEPTEMBER 1981 – REVISED APRIL 1997
MECHANICAL DATA
KC (R-PSFM-T3)
PLASTIC FLANGE-MOUNT PACKAGE
0.120 (3,05)
0.100 (2,54)
0.420 (10,67)
0.380 (9,65)
0.156 (3,96)
DIA
0.146 (3,71)
0.185 (4,70)
0.175 (4,46)
(see Note H)
0.052 (1,32)
0.048 (1,22)
0.270 (6,86)
0.230 (5,84)
(see Note H)
0.625 (15,88)
0.560 (14,22)
0.125 (3,18)
(see Note C)
(see Note F)
0.250 (6,35)
MAX
0.562 (14,27)
0.500 (12,70)
1
0.035 (0,89)
0.029 (0,74)
0.010 (0,25) M
3
0.070 (1,78)
0.045 (1,14)
0.122 (3,10)
0.102 (2,59)
0.025 (0,64)
0.012 (0,30)
0.100 (2,54)
0.200 (5,08)
4040207 / B 01/95
NOTES: A.
B.
C.
D.
E.
F.
G.
H.
14
All linear dimensions are in inches (millimeters).
This drawing is subject to change without notice.
Lead dimensions are not controlled within this area.
All lead dimensions apply before solder dip.
The center lead is in electrical contact with the mounting tab.
The chamfer is optional.
Falls within JEDEC TO-220AB
Tab contour optional within these dimensions
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