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YZP0008 データシート(PDF) 9 Page - Texas Instruments

部品番号 YZP0008
部品情報  3.6-V, 3-A, 7.5-m(ohm) On-Resistance Load Switch With Adjustable Fast Turnon and Power Good
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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YZP0008 データシート(HTML) 9 Page - Texas Instruments

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D(max)
JA
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9
TPS22971
www.ti.com
SLVSDK7 – APRIL 2017
Product Folder Links: TPS22971
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
9.1.1 Thermal Consideration
It is recommended to limit the junction temperature (TJ) to below 125°C. To calculate the maximum allowable
dissipation, PD(max) for a given output current and ambient temperature, use Equation 1 as a guideline:
where
PD(max) is maximum allowable power dissipation
TJ(max) is maximum allowable junction temperature
TA is ambient temperature of the device
ΘJA is junction to air thermal impedance. See the Thermal Information section. This parameter is highly
dependent upon board layout
(1)
9.1.2 Power Sequencing
The TPS22971 has an integrated power good indicator which can be used for power sequencing. As shown in
Figure 3, the switch to the second load is controlled by the PG signal from the first switch. This ensures that the
power to load 2 is only enabled after the power to load 1 is enabled after the first switch has turned on.


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