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MC9S12VR-Family - Data Sheet - Freescale Semiconductor

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MCU Electrical Specifications<br />

The total power dissipation P D can be calculated from the equation below. Table A-6 below lists the power<br />

dissipation components . Figure A-2. gives an overview of the supply currents.<br />

P D = P INT + P HS + P LS + P LIN + P SENSE + P HVI - P EVDD - P GPIO<br />

Table A-6. Power Dissipation Components<br />

Power Component Description<br />

P INT = V SUP I SUP<br />

P INT = V SUP (I SUP - I PHS0/1)<br />

Internal Power for LQFP 48 Package with<br />

seperate VSUP and VSUPHS pins.<br />

Internal Power for LQFP 32 Package with single<br />

VSUP pin which is double bonded to<br />

VSUP pad and VSUPHS pad.<br />

P HS = I PHS0/1 2 RDSONHS0/1 Power dissipation of High-side drivers<br />

P LS = I PLS0/1 2 RDSONLS0/1 Power dissipation of Low-side drivers<br />

P LIN = V LIN I LIN<br />

P SENSE = V SENSE I SENSE<br />

P HVI = V HVI I HVI<br />

P EVDD = V DDX I EVDD<br />

P GPIO = V I/O I I/O<br />

Power dissipation of LINPHY<br />

Power dissipation of Battery Sensor<br />

Power dissipation of High Voltage Inputs<br />

Power dissipation of external load driven by<br />

EVDD. (see Figure A-2.) This component is<br />

included in P INT and is subtracted from overall<br />

MCU power dissipation P D<br />

Power dissipation of external load driven by<br />

GPIO Port.(see Figure A-2.) Assuming the<br />

load is connected between GPIO and ground.<br />

This power component is included in P INT and<br />

is subtracted from overall MCU power dissipation<br />

P D<br />

<strong>MC9S12VR</strong> <strong>Family</strong> Reference Manual, Rev. 2.8<br />

514 <strong>Freescale</strong> <strong>Semiconductor</strong>

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