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TL783 Datenblatt(PDF) 8 Page - Texas Instruments

Teilenummer TL783
Bauteilbeschribung  TL783 High-voltage Adjustable Regulator
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
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TL783 Datenblatt(HTML) 8 Page - Texas Instruments

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Protection
Circuit
OUT
IN
Vref
R1
R2
VO
VI
Error
Amplifier
ADJ
O
ref
R2
V
V
1
R1
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TL783
SLVS036N – SEPTEMBER 1981 – REVISED JANUARY 2015
www.ti.com
8 Detailed Description
8.1 Overview
The TL783 device is an adjustable three-terminal high-voltage 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 TL783 device 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 TL783 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 disconnected inadvertently, 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.
8.2 Functional Block Diagram
8.3 Feature Description
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
8.4 Device Functional Modes
8.4.1 Active Mode
The TL783 acts as a high-voltage adjustable regulator. The device works to keep the voltage at the OUT pin 1.25
V higher than the voltage at the ADJ pin. Therefore, a resistor divider can be used to set the output voltage.
8
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Copyright © 1981–2015, Texas Instruments Incorporated
Product Folder Links: TL783


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