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參數(shù)資料
| 型號： | TCV7101F(TE12L,Q) |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 720 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 5 X 5 MM, 1.27 MM PITCH, PLASTIC, HSON-8 |
| 文件頁數(shù)： | 17/17頁 |
| 文件大?。?/td> | 461K |
| 代理商： | TCV7101F(TE12L,Q) |
TCV7101F
2010-03-18
9
Thermal Shutdown (TSD)
The TCV7101F provides thermal shutdown. When the junction temperature continues to rise and reaches TSD
(150°C typ.), the TCV7101F 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.
External components such as capacitors, inductors and resistors should be placed as close to the TCV7101F as
possible.
The TCV7101F has an ESD diode between the EN and VIN2 pins. The voltage between these pins should satisfy
VEN VIN2 < 0.3 V.
Add a decoupling capacitor (CC) of 0.1 μF to 1 μF between the GND and VIN2 pins. To achieve stable operation,
also insert a resistor of about 100
Ω between the VIN2 and VIN1 pins to reduce the ripple voltage at the VIN2 pin.
The minimum programmable output voltage is 0.8 V (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
temperature: TSD
GND
Switching operation stops
Recovery from TSD
Switching operation starts
VOUT
0
Tj
Hysteresis:
ΔTSD
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