Over Temperature Protection Ic

The same method is used in the design of this battery over charging protection circuit.

Over temperature protection ic.

I believe 70 degrees in celsius is good because high power. The accuracy of a relatively simple temperature detection circuit consisting of an ntc thermistor and fixed resistors is fully sufficient for the protection of an hdd and much more cost efficient than a circuit using a temperature sensor ic. This will make the exact 7 7 v which is the required cut in voltage in the circuit. If the power dissipation within the ldo is excessive the internal junction temperature will rise above the typical shutdown threshold of 150 c.

This characteristic is self regulating. Over temperature protection otp 6. Usually power supplies have a monitoring integrated circuit on their secondary see figure 1 which is in charge of the power supply protections. Once the ptc cools down it permits the current to flow again.

Ic data sheets often give some informations about the circuits over temperature protection. White paper intelligent over temperature protection for led lighting applications 01 october 2013 7 4 ic implementation of smart over temperature protection leveraging the key idea of a patent to use the led driver ic as a thermal sensor a patent pending technology has been developed to protect the leds with a slope dimming characteristic and. Lets take a microchip ldo mcp1702 for example. The 1n4007 diode has forward voltage drop of 0 7 v so it will provide the extra 0 7 v drop.

I made simple over temperature protection circuit which will shut down leds when a certain temperature is reached. Over operating free air temperature range unless otherwise noted 1 min max unit in pgate with respect to vss 0 3 30. That is why there will be a lot of dissipating heat. The secondary protection is composed of the secondary safety ptc tco and nonresettable fuse blocks.

Over temperature protection in a power supply is a protection system that shuts down the power supply when the internal temperature exceeded a safe value. A circuit is used to monitor and generate a trigger signal that starts the shutdown process at the high temperatures. Idea super brigth led light will include 100 leds which consume 1 watt per led. Bq24308 overvoltage and overcurrent protection ic and li charger front end protection ic 1 features 3 description the bq24308 device is a highly integrated circuit ic.

For example a zener diode of 7 v can be used in series with a 1n4007 diode. Often the primary protection and gas gauge components are combined into a single ic which may include additional protection features not shown above like over under temperature protection and battery authentication.