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Ptc Thermistor Protect The Mosfet Of Dc-dc Converters
Posted at: Offers to Sell and Export | Posted on: Tuesday 26 March 2013 2:11 am | Poster last visit: Sunday 7 April 2013 | | China
Product Category: Main
» Electronic Components and Supplies
» Passive discrete components
» Resistors
» Thermistor
» Ptc Thermistor Protect The Mosfet Of Dc-dc Converters
Product Description:
Roles of PTC thermistor in Protecting DC-DC Converters MOSFET from Overheating
Detects abnormal temperature
rise of the MOSFET, switches on the transistor, and decreases the FET's gate voltage to prevent the FET from overheating.
Decreases the resistance of the PTC thermistor and unlike the thermal fuse, recovers its original resistance, when the MOSFET temperature drops.
PTC Thermistor Converters MOSFET Temperature Protecting Outline
The MOSFET is used as the switching element of DC-DC converters or as a general-purpose current switch. When the FET is operated at a higher temperature than specified due to overloading or insufficient heat radiation, the FET can become damaged. Damage to the FET can be prevented by detecting whether it is overheating with PTC thermistor for overheat detection.
PTC thermistor for overheat detection detects the temperature of the FET itself, with the resistance of the PTC thermistor increasing when the temperature exceeds a desired point. This enables the base current to flow through the transistor and switch it on. The gate current of the FET is then bypassed to decrease the gate voltage, preventing the FET from being damaged.
Circuit example of PTC thermistor protecting the MOSFET from overheating
FET is often used in electronic circuits as a switching element, power amplifier, etc.
When the rated temperature of the FET is exceeded because of overload or insufficient heat radiation, the FET may break down. PTC thermistor is useful to monitor the FET's temperature. When the FET's temperature approaches the maximum rating, PTC thermistor turns the transistor on. In this way the FET's gate voltage decreases below its threshold level and the FET is turned off. When the FET's temperature returns within the rating, normal operation returns. There is therefore no need to exchange protecting elements like fuses.
Company Contact:
Contact Name: Mary Yeung
Company Name: Shenzhen DXM Technology Co., Ltd
Email:
Tel: 86-755-27522473
Fax: 86-755-27522896
Street Address: Block C, Sanhe
International Science And Technology
Zone, Dalang Street, Baoan District,
Shenzhen, Guangdong 518109 China
Website: http://www.dxmht.com
Member name: DXMresistor
Country:
China
Member Since: 27 July 2012
Total Leads: 47 DXMresistor Import Export Business Leads
Business focus: Ptc Thermistor, Ntc Thermistor, Thermal Resistor, Pptc, Sensor, Ptc Heater, Temperature Sensor, Varistor, Capacitor, Sensitive Electronic Components
Chat:
Verify: Safe Import Export Tips
Detects abnormal temperature
rise of the MOSFET, switches on the transistor, and decreases the FET's gate voltage to prevent the FET from overheating.
Decreases the resistance of the PTC thermistor and unlike the thermal fuse, recovers its original resistance, when the MOSFET temperature drops.
PTC Thermistor Converters MOSFET Temperature Protecting Outline
The MOSFET is used as the switching element of DC-DC converters or as a general-purpose current switch. When the FET is operated at a higher temperature than specified due to overloading or insufficient heat radiation, the FET can become damaged. Damage to the FET can be prevented by detecting whether it is overheating with PTC thermistor for overheat detection.
PTC thermistor for overheat detection detects the temperature of the FET itself, with the resistance of the PTC thermistor increasing when the temperature exceeds a desired point. This enables the base current to flow through the transistor and switch it on. The gate current of the FET is then bypassed to decrease the gate voltage, preventing the FET from being damaged.
Circuit example of PTC thermistor protecting the MOSFET from overheating
FET is often used in electronic circuits as a switching element, power amplifier, etc.
When the rated temperature of the FET is exceeded because of overload or insufficient heat radiation, the FET may break down. PTC thermistor is useful to monitor the FET's temperature. When the FET's temperature approaches the maximum rating, PTC thermistor turns the transistor on. In this way the FET's gate voltage decreases below its threshold level and the FET is turned off. When the FET's temperature returns within the rating, normal operation returns. There is therefore no need to exchange protecting elements like fuses.
Company Contact:
Contact Name: Mary Yeung
Company Name: Shenzhen DXM Technology Co., Ltd
Email:
Tel: 86-755-27522473
Fax: 86-755-27522896
Street Address: Block C, Sanhe
International Science And Technology
Zone, Dalang Street, Baoan District,
Shenzhen, Guangdong 518109 China
Website: http://www.dxmht.com
Member name: DXMresistor
Country:
ChinaMember Since: 27 July 2012
Total Leads: 47 DXMresistor Import Export Business Leads
Business focus: Ptc Thermistor, Ntc Thermistor, Thermal Resistor, Pptc, Sensor, Ptc Heater, Temperature Sensor, Varistor, Capacitor, Sensitive Electronic Components
Chat:
Verify: Safe Import Export Tips
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Main - Electronic Components and Supplies - Passive discrete components - Resistors - Thermistor [75]
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