AAT4682 Datasheet, PDF (9/10 Pages) Advanced Analogic Technologies – Dual Electronic Resettable Switches

T_SD(MIN) is the minimum temperature required to
activate the AAT4682 over-temperature protection.
The typical over-temperature threshold specifica-
tion is 125°C; therefore, 115°C is a safe minimum
value to use.
For example, if an application is specified to oper-
ate in 50°C environments, the PCB operates at
AAT4682
Dual Electronic Resettable Switch
temperatures as high as 85°C. The application is
sealed and its PCB is small, causing R_θJA to be
approximately 150°C/W. Using Equation 2:
Eq. 3:
I_MAX ⁼
115 - 85
600 · 150 ^{= 575mA}
To prevent thermal limiting, the combined operating
load current of each output in the application must
be less than 575mA.
4682.2006.05.1.2
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