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SM72480 Datasheet

LLP-6 Factory Preset Temperature Switch and Temperature Sensor

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SM72480
May 11, 2011
SolarMagic 1.6V, LLP-6 Factory Preset Temperature Switch
and Temperature Sensor
General Description
The SM72480 is a low-voltage, precision, dual-output, low-
power temperature switch and temperature sensor. The tem-
perature trip point (TTRIP) is set at the factory to be 120°C.
Built-in temperature hysteresis (THYST) keeps the output sta-
ble in an environment of temperature instability.
In normal operation the SM72480 temperature switch outputs
assert when the die temperature exceeds TTRIP. The temper-
ature switch outputs will reset when the temperature falls
below a temperature equal to (TTRIP − THYST). The
OVERTEMP digital output, is active-high with a push-pull
structure, while the OVERTEMP digital output, is active-low
with an open-drain structure.
The analog output, VTEMP, delivers an analog output voltage
with Negative Temperature Coefficient — NTC.
Driving the TRIP TEST input high: (1) causes the digital out-
puts to be asserted for in-situ verification and, (2) causes the
threshold voltage to appear at the VTEMP output pin, which
could be used to verify the temperature trip point.
The SM72480's low minimum supply voltage makes it ideal
for 1.8 volt system designs. Its wide operating range, low
supply current , and excellent accuracy provide a temperature
switch solution for a wide range of commercial and industrial
applications.
Applications
PV Power Optimizers
Wireless Transceivers
Battery Management
Automotive
Disk Drives
Features
Renewable Energy Grade
Low 1.6V operation
Latching function: device can latch the Over Temperature
condition
Push-pull and open-drain temperature switch outputs
Very linear analog VTEMP temperature sensor output
VTEMP output short-circuit protected
2.2 mm by 2.5 mm (typ) LLP-6 package
Excellent power supply noise rejection
Key Specifications
Supply Voltage
Supply Current
Accuracy, Trip Point
Temperature
Accuracy, VTEMP
VTEMP Output Drive
Operating Temperature
Hysteresis Temperature
www.DataSheet.net/
1.6V to 5.5V
8 μA (typ)
0°C to 150°C
±2.2°C
0°C to 150°C
±2.3°C
±100 μA
−50°C to 150°C
4.5°C to 5.5°C
Connection Diagram
Typical Transfer Characteristic
LLP-6
VTEMP Analog Voltage vs Die Temperature
Top View
30142001
See NS Package Number SDB06A
© 2011 National Semiconductor Corporation 301420
30142024
www.national.com
Datasheet pdf - http://www.DataSheet4U.co.kr/


National Semiconductor Electronic Components Datasheet

SM72480 Datasheet

LLP-6 Factory Preset Temperature Switch and Temperature Sensor

No Preview Available !

Block Diagram
30142003
Pin Descriptions
Pin
No.
Name
Type
1
TRIP
TEST
Digital
Input
Equivalent Circuit
www.DataSheet.net/
Description
TRIP TEST pin. Active High input.
If TRIP TEST = 0 (Default) then:
VTEMP = VTS, Temperature Sensor Output Voltage
If TRIP TEST = 1 then:
OVERTEMP and OVERTEMP outputs are asserted and
VTEMP = VTRIP, Temperature Trip Voltage.
This pin may be left open if not used.
5 OVERTEMP Digital
Output
3
OVERTEMP
Digital
Output
Over Temperature Switch output
Active High, Push-Pull
Asserted when the measured temperature exceeds the Trip Point
Temperature or if TRIP TEST = 1
This pin may be left open if not used.
Over Temperature Switch output
Active Low, Open-drain (See Section 2.1 regarding required pull-up
resistor.)
Asserted when the measured temperature exceeds the Trip Point
Temperature or if TRIP TEST = 1
This pin may be left open if not used.
www.national.com
2
Datasheet pdf - http://www.DataSheet4U.co.kr/


Part Number SM72480
Description LLP-6 Factory Preset Temperature Switch and Temperature Sensor
Maker National Semiconductor
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SM72480 Datasheet PDF






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