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TPS3702AX18DDCR Datasheet(PDF) 10 Page - Texas Instruments

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No. de pieza TPS3702AX18DDCR
Descripción Electrónicos  High-Accuracy, Overvoltage and Undervoltage Monitor
Download  28 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS3702AX18DDCR Datasheet(HTML) 10 Page - Texas Instruments

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SENSE
GND
VDD
UV
OV
Reference
SET
Threshold
Logic
TPS3702
SBVS251 – JANUARY 2015
www.ti.com
7 Detailed Description
7.1 Overview
The TPS3702 family of devices combines two comparators and a precision reference for overvoltage and
undervoltage detection. The TPS3702 features a wide supply voltage range (2 V to 18 V) and highly accurate
window threshold voltages (0.9% over temperature). The TPS3702 is designed for systems that require an active
low signal if the voltage from the monitored power supply exits the accuracy band. The outputs can be pulled up
to 18 V and can sink up to 10 mA.
Unlike many other window comparators, the TPS3702 includes the resistors used to set the overvoltage and
undervoltage thresholds internal to the device. These internal resistors allow for lower component counts and
greatly simplifies the design because no additional margins are needed to account for the accuracy of external
resistors.
The TPS3702 is designed to assert active low output signals when the monitored voltage is outside the window
band. The relationship between the monitored voltage and the states of the outputs is shown in Table 1.
Table 1. Truth Table
CONDITION
OUTPUT
STATUS
SENSE < VIT–(UV)
UV low
UV is asserted
SENSE > VIT–(UV) + VHYS
UV high
UV is high impedance
SENSE > VIT+(OV)
OV low
OV is asserted
SENSE < VIT+(OV) – VHYS
OV high
OV is high impedance
7.2 Functional Block Diagram
10
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Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: TPS3702


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