參數(shù)資料
型號： MPC5606SVLU6R
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 64 MHz, MICROCONTROLLER, PQFP176
封裝： 24 X 24 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, MS-026BGA, LQFP-176
文件頁數(shù)： 100/136頁
文件大小： 858K
代理商： MPC5606SVLU6R
MPC5606S Microcontroller Data Sheet, Rev. 7
Freescale Semiconductor
66
Figure 7. External NPN ballast connections
The capacitor values listed in Table 22 include a de-rating factor of 40%, covering tolerance, temperature, and aging effects.
These factors are taken into account to assure proper operation under worst-case conditions. X7R type materials are
recommended for all capacitors, based on ESR characteristics.
Large capacitors are for regulator stability and should be located near the external ballast transistor. The number of capacitors
is not important — only the overall capacitance value and the overall ESR value are important.
Small capacitors are for power supply decoupling, although they do contribute to the overall capacitance values. They should
be located close to the device pin.
Table 21. Allowed ballast components
Part
Manufacturer
Recommended derivative
BCP68
ON, IFX, NXP, Fairchild, ST, etc.
BCP68
BCX68
IFX
BCX68-10
BCX68-16
BC817
ON, IFX, NXP, Fairchild, etc.
BC817Su
BC817-25
BCP56
ON, IFX, NXP, Fairchild, ST, etc.
BCP68-10
BCP68-16
Table 22. Ballast component parameters
Parameter
Specification
Capacitance on VDDR
10
F (minimum)
Place close to NPN collector
Stability capacitance on VDD12
40
F (minimum)
Place close to NPN emitter
Decoupling capacitance on VDD12
100 nF
number of pins (minimum)
Place on each VDD12/VSS12 pair and on the PLL
supply/ground pair
Base resistor
20 k
VRC_CTRL
VDDR
VDD12
20 k
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