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AAT4618IGV-1.0-T1 Datasheet(PDF) 9 Page - Advanced Analog Technology, Inc. |
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AAT4618IGV-1.0-T1 Datasheet(HTML) 9 Page - Advanced Analog Technology, Inc. |
9 / 11 page AAT4618 would be if the AAT4618 were not dissi- pating power. Equation 1 can be rearranged to solve for IMAX, as shown in Equation 2. Eq. 2: TSD(MIN) is the minimum temperature required to activate the AAT4618 over-temperature protection. With the typical specification of 125°C, 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 temperatures as high as 85°C. The application is sealed and its PCB is small, causing RθJA to be approximately 150 °C/W. Using Equation 2, Eq. 3: The AAT4618 is safe to operate at the minimum current limit level of 500mA at 85°C. = IMAX = 950mA 115 - 85 220 · 150 = IMAX TSD(MIN) - TA(MAX) RDS(ON)(MAX) · RΘJA AAT4618 Current Limited Load Switch 4618.2006.05.1.2 9 |
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