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MCP73830 bảng dữ liệu(PDF) 15 Page - Microchip Technology

tên linh kiện MCP73830
Giải thích chi tiết về linh kiện  Single-Cell Li-Ion/Li-Polymer Battery Charge Management Controllers in 2x2 TDFN
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 2011-2019 Microchip Technology Inc.
DS20005049E-page 15
MCP73830/L
Virtually any good quality output filter capacitor can be
used independent of the capacitor’s minimum Effective
Series Resistance (ESR) value. The actual value of the
capacitor (and its associated ESR) depends on the
output load current. A 1 µF ceramic, tantalum or alumi-
num electrolytic capacitor at the output is usually
sufficient to ensure stability.
6.1.1.4
Reverse-Blocking Protection
The MCP73830/L devices provide protection from a
faulted or shorted input. Without the protection, a
faulted or shorted input would discharge the battery
pack through the body diode of the internal pass
transistor.
6.2
PCB Layout Issues
For optimum voltage regulation, place the battery pack
as close as possible to the device’s VBAT and VSS pins,
which is recommended to minimize voltage drops
along the high current carrying PCB traces.
If the PCB layout is used as a heat sink, adding many
vias in the heat sink pad can help conduct more heat to
the backplane of the PCB, thus reducing the maximum
junction temperature. Figure 6-5 and Figure 6-6 depict
a typical layout with PCB heat sinking.
FIGURE 6-4:
Typical Layout (Top).
FIGURE 6-5:
Typical Layout (Top Metal).
FIGURE 6-6:
Typical Layout (Bottom).



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