TLV9102IDDFR datasheet(25/81 Pages) TI

25 / 81 page

Time (20µs/Div)

C016

Input

Output

Figure 7-2. No Phase Reversal

7.3.3 Thermal Protection

The internal power dissipation of any amplifier causes its internal (junction) temperature to rise. This

phenomenon is called self heating. The absolute maximum junction temperature of the TLV910x is 150°C.

Exceeding this temperature causes damage to the device. The TLV910x has a thermal protection feature that

prevents damage from self heating. The protection works by monitoring the temperature of the device and

turning off the op amp output drive for temperatures above 140°C. Figure 7-3 shows an application example

for the TLV9101 that has significant self heating (154°C) because of its power dissipation (0.39 W). Thermal

calculations indicate that for an ambient temperature of 100°C, the device junction temperature must reach

154°C. The actual device, however, turns off the output drive to maintain a safe junction temperature. Figure 7-3

shows how the circuit behaves during thermal protection. During normal operation, the device acts as a buffer

so the output is 3 V. When self heating causes the device junction temperature to increase above 140°C, the

thermal protection forces the output to a high-impedance state and the output is pulled to ground through resistor

RL.

140ºC

3 V

0 V

150°C

16 V

100 Ÿ

VIN

3 V

OUT = 30 mA

TLV9101

TA = 100°C

PD = 0.39W

JA = 138.7°C/W

TJ = 138.7°C/W × 0.39W + 100°C

TJ = 154.1°C (expected)

Normal

Operation

Output

High-Z

Figure 7-3. Thermal Protection

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TLV9101, TLV9102, TLV9104

SBOS943E – FEBRUARY 2019 – REVISED AUGUST 2021

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Product Folder Links: TLV9101 TLV9102 TLV9104

TLV9102IDDFR Datasheet(PDF) 25 Page - Texas Instruments

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