TCV7113F

2012-02-28

9

Thermal Shutdown (TSD)

The TCV7113F provides thermal shutdown. When the junction temperature continues to rise and reaches TSD

= 150°C (typ.), the TCV7113F goes into thermal shutdown and shuts off the power supply. TSD has a hysteresis

of about 15°C (typ.). The device is enabled again when the junction temperature has dropped by approximately

15°C from the TSD trip point. The device resumes the power supply when the soft-start circuit is activated upon

recovery from TSD state.

Thermal shutdown is intended to protect the device against abnormal system conditions. It should be ensured

that the TSD circuit will not be activated during normal operation of the system.

Figure 6 Thermal Shutdown Operation

Usage Precautions

• The input voltage, output voltage, output current and temperature conditions should be considered when

selecting capacitors, inductors and resistors. These components should be evaluated on an actual system

prototype for best selection.

• Parts of this product in the surrounding are examples of the representative, and the supply might become

impossible. Please confirm latest information when using it.

•

External components such as capacitors, inductors and resistors should be placed as close to the TCV7113F as

possible.

•

•

also insert a resistor of about 100

• The minimum programmable output voltage is 0.8V (typ.). If the difference between the input and output

voltages is small, the output voltage might not be regulated accurately and fluctuate significantly.

• GND pin is connected with the back of IC chip and serves as the heat radiation pin. Secure the area of a GND

pattern as large as possible for greater of heat radiation.

• The overcurrent protection circuits in the Product are designed to temporarily protect Product from minor

overcurrent of brief duration. When the overcurrent protective function in the Product activates, immediately

cease application of overcurrent to Product. Improper usage of Product, such as application of current to Product

exceeding the absolute maximum ratings, could cause the overcurrent protection circuit not to operate properly

and/or damage Product permanently even before the protection circuit starts to operate.

• The thermal shutdown circuits in the Product are designed to temporarily protect Product from minor

overheating of brief duration. When the overheating protective function in the Product activates, immediately

correct the overheating situation. Improper usage of Product, such as the application of heat to Product

exceeding the absolute maximum ratings, could cause the overheating protection circuit not to operate properly

and/or damage Product permanently even before the protection circuit starts to operate.

Soft start

TSD detection

GND

Switching operation stops

Recovery from TSD

Switching operation starts

0

Hysteresis: