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UA7805CKCS bảng dữ liệu(PDF) 11 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  Fixed Positive Voltage Regulators
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INPUT
OUTPUT
COMMON
uA7805, uA7808, uA7810
uA7812, uA7815, uA7824
www.ti.com
SLVS056P – MAY 1976 – REVISED JANUARY 2015
8 Detailed Description
8.1 Overview
This series of fixed-voltage integrated-circuit voltage regulators is designed for a wide range of applications.
These applications include on-card regulation for elimination of noise and distribution problems associated with
single-point regulation. Each of these regulators can deliver up to 1.5 A of output current. The internal current-
limiting and thermal-shutdown features of these regulators essentially make them immune to overload. In
addition to use as fixed-voltage regulators, these devices can be used with external components to obtain
adjustable output voltages and currents, and also can be used as the power-pass element in precision
regulators.
8.2 Functional Schematic
8.3 Feature Description
8.3.1 Thermal Overload
When the die temperature increases to unwanted levels, the device will reduce the output current to lower its
temperature. Under heavy loads, the device may alternate between on and off output states to regulate
temperature.
8.3.2 Short-Circuit Current Limiting
In the event of a short circuit, the device will limit its own current to safe levels by lowering the bias voltage of
internal pass transistors. If the device becomes overheated, the thermal overload protection will take over.
8.4 Device Functional Modes
8.4.1 Fixed-Output Mode
These devices are available in fixed-output voltages. See the orderable part list for the desired output.
Copyright © 1976–2015, Texas Instruments Incorporated
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Product Folder Links: uA7805 uA7808 uA7810 uA7812 uA7815 uA7824


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