参数资料
型号: MC9S12DG256VFUE
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
封装: QFP-80
文件页数: 127/132页
文件大小: 782K
代理商: MC9S12DG256VFUE
MC9S12DT256 Device User Guide — V03.07
94
The total power dissipation can be calculated from:
Two cases with internal voltage regulator enabled and disabled must be considered:
1.
Internal Voltage Regulator disabled
PIO is the sum of all output currents on I/O ports associated with VDDX and VDDR.
For RDSON is valid:
respectively
2.
Internal voltage regulator enabled
IDDR is the current shown in Table A-7 and not the overall current flowing into VDDR, which
additionally contains the current flowing into the external loads with output high.
PIO is the sum of all output currents on I/O ports associated with VDDX and VDDR.
TJ TA PD ΘJA
()
+
=
TJ Junction Temperature, [°C]
=
TA Ambient Temperature, [°C]
=
PD Total Chip Power Dissipation, [W]
=
ΘJA Package Thermal Resistance, [°C/W]
=
PD PINT PIO
+
=
PINT Chip Internal Power Dissipation, [W]
=
PINT IDD VDD
IDDPLL VDDPLL
IDDA
+VDDA
+
=
PIO
RDSON
i
IIO
i
2
=
RDSON
VOL
IOL
------------ for outputs driven low
;
=
RDSON
VDD5 VOH
IOH
------------------------------------ for outputs driven high
;
=
PINT IDDR VDDR
IDDA VDDA
+
=
PIO
RDSON
i
IIO
i
2
=
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