ZXLD1371QESTTC Diodes Inc. / Zetex, ZXLD1371QESTTC Datasheet - Page 35

• Manufacturer Part Number: ZXLD1371QESTTC
• Description: MOSFET LED Controller TSSOP TSSOP-16EP T&R 2.5K
• Manufacturer: Diodes Inc. / Zetex

Specifications of ZXLD1371QESTTC

• Rohs: yes

The thermistor resistance, R
Where
For example,
Over-Temperature Shutdown
The ZXLD1371 incorporates an over-temperature shutdown circuit to protect against damage caused by excessive die
temperature. A warning signal is generated on the STATUS output when die temperature exceeds 125°C nominal and the
output is disabled when die temperature exceeds 150°C nominal. Normal operation resumes when the device cools back
down to 125°C.
ZXLD1371
Document number: DS35436 Rev. 1 - 2
Applications Information
1)
2)
3)
R
R
T
B is the “beta” value of the thermistor.
Temperature threshold T
TH1 = 10kΩ at 25˚C and B = 3900
R
R
R
th
T
= R
is the thermistor resistance at the reference temperature, T
is the reference temperature, in Kelvin, normally 273 + 25 = 298K (25°C)
= R
T
R
at T
e
B
threshold
1
T
-
T R
1
T
, at a temperature of T degrees Kelvin is given by
= 1.8kΩ
threshold
(cont.)
Figure 14. Thermal Feedback Network
= 273 + 70 = 343K (70˚C)
R
T
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= 1.8kΩ @ 70˚C
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R
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February 2012
ZXLD1371