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MPC18730EP/R2 bảng dữ liệu(PDF) 23 Page - Freescale Semiconductor, Inc

tên linh kiện MPC18730EP/R2
Giải thích chi tiết về linh kiện  Power Management IC with Five Power Management IC with Five Power Management IC with Five Power Management IC with Five
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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MPC18730EP/R2 bảng dữ liệu(HTML) 23 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
23
18730
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
VG GENERATOR
Figure 10. Circuit when using a Step-Up Converter
When WAKE (int) goes High from Low, the start-up circuit
raises the VB voltage and outputs it to VG, then outputs the
VG voltage when RSTO1B (int) goes High. The charge pump
circuit can be used for both Ni_mh and Li_ion by setting the
necessary registers. The charge pump circuit is disabled by
default.
The VG voltage can be set to 6 V to 4.5 V according to the
combination of VGSEL1 and 2 pin connections. Refer to
Table 16, VG Voltage Settings and VGSEL1 and 2 Pin
Connection on page 24 for the VG voltage settings.
When using a charge pump, please refer to Figure 11.
Figure 11. Circuit When Using a Charge Pump
VG
VB
VG
Step-Up
Pre Driver
VG
LG
Start Up
VB
VG
PGND3
VG_select
VG_duty
VG
VB
VG
Step-Up
Pre Driver
VG
LG
Start Up
VB
VG
VGH
CPoff
VB
VG
C1L
PGND3
VG_select
VG_duty



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