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RT9726

RichTek
Part Number RT9726
Manufacturer RichTek
Description High-Voltage Hysteresis Selectable Temperature Switch
Published Mar 31, 2015
Detailed Description RT9726 High-Voltage Hysteresis Selectable Temperature Switch General Description The RT9726 is a temperature switch wi...
Datasheet PDF File RT9726 PDF File

RT9726
RT9726

Overview
RT9726 High-Voltage Hysteresis Selectable Temperature Switch General Description The RT9726 is a temperature switch with wide input voltage range.
The over-temperature threshold point is generated by a negative temperature coefficient (NTC) thermistor and a setting resistor.
The RT9726 provides an active-low, opendrain logic output.
OT goes LOW when the NTC pin voltage is lower than 50% of the REF voltage threshold.
The RT9726 provides the selectable hysteresis mode that can be set by the EN pin Input voltage.
The IC is available in SC-70-6 package.
Ordering Information RT9726 Package Type U6 : SC-70-6 Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are : ` RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information Features z Wide Input Voltage Range : 4.
75V to 25V z 0.
5μA Shutdown Current z 2 Selectable Hysteresis Threshold z Reference Output for Thermal Threshold Setting z Open-drain Logic Output z RoHS Compliant and Halogen Free Applications z Notebook Temperature Monitoring z Microprocessor Thermal Management z Temperature Control z Fan Control z Electronic System Protection Pin Configurations (TOP VIEW) EN REF OT 65 4 23 VIN GND NTC SC-70-6 A1=W A1= : Product Code W : Date code Typical Application Circuit 5V 100k VIN 4.
75V to 25V Chip Enable 3.
3V 1 VIN OT 4 C1 0.
1µF 6 RT9726 REF 5 EN 2 GND NTC 3 System SHDN# R1 570 Thermistor ß = 4250 System shutdown switch @ Temp = 100°C 10k for default hysteresis 30°C DS9726-01 April 2011 Downloaded from Elcodis.
com electronic components distributor www.
richtek.
com 1 RT9726 Function Block Diagram REF NTC VIN REF Hysteresis Control + EN OT GND Functional Pin Description Pin No.
Pin Name Pin Function 1 VIN High Voltage Power Supply Input.
This pin should be bypassed with a 0.
1μF capacitor to ground.
2 GND 3 NTC Ground pin.
Tie the ground pin close to temperature ...


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