R

INT

210kW

R

SET

T

SET

OUT

V+

HYST

SET

V

TEMP

TMP300

3 A

m

Proportional

toT

A

Open-DrainControl

Voltagesource

totesttrippoint.

R

ink

=

W

SET

10(50+T

)

SET

3

R

=

SET

(T

0.01+0.5)

´

SET

6

TMP300

www.ti.com

SBOS335D – JUNE 2005 – REVISED JANUARY 2016

6 Detailed Description

6.1 Overview

The TMP300 is a thermal sensor designed for over-temperature protection circuits in electronic systems. The

TMP300 uses a set resistor to program the trip temperature of the digital output. An additional high-impedance

(210k

Ω) analog voltage output provides the temperature reading.

6.2 Feature Description

3

μA internal bias current.

Equation 2:

where

•

(1)

where

•

(2)

The analog voltage output can also serve as a voltage input that forces a trip of the digital output to simulate a

thermal event. This simulation facilitates easy system design and test of thermal safety circuits, as shown in

Figure 8.

Figure 8. Applying Voltage to Trip Digital Output

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7

Product Folder Links: TMP300