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TMP300-Q1 Fiches technique(PDF) 6 Page - Texas Instruments

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No de pièce TMP300-Q1
Description  1.8V, Resistor-Programmable TEMPERATURE SWITCH and ANALOG OUT TEMPERATURE SENSOR in SC70
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TMP300-Q1 Fiches technique(HTML) 6 Page - Texas Instruments

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R
=
SET
(T
0.01+0.5)
´
SET
3e-
6
R
ink
=
W
SET
10(50+T
)
SET
3
R
INT
210kW
R
SET
T
SET
OUT
V+
HYST
SET
V
TEMP
TMP300
3 A
m
Proportional
toT
A
Open-DrainControl
Voltagesource
totesttrippoint.
TMP300B-Q1
SBOS586
– DECEMBER 2011
www.ti.com
APPLICATIONS INFORMATION
To set the TMP300B-Q1 to trip at a preset value,
The TMP300B-Q1 is a thermal sensor designed for
calculate
the
RSET resistor value according to
over-temperature
protection
circuits
in
electronic
Equation 1 or Equation 2:
systems. The TMP300B-Q1 uses a set resistor to
program the trip temperature of the digital output. An
additional high-impedance (210k
Ω) analog voltage
(1)
output provides the temperature reading.
Where TSET is in °C; or
CALCULATING RSET
The set resistor (RSET) provides a threshold voltage
(2)
for the comparator input. The TMP300B-Q1 trips
Where TSET is in °C.
when the VTEMP pin exceeds the TSET voltage. The
value of the set resistor is determined by the analog
USING VTEMP TO TRIP THE DIGITAL OUTPUT
output function and the 3
μA internal bias current.
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
6
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Copyright
© 2011, Texas Instruments Incorporated
Product Folder Link(s): TMP300B-Q1


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