MCP73123_11 Datasheet, PDF(23/34 Page) Microchip Technology – Lithium Iron Phosphate (LiFePO4) Battery Charge Management Controller with Input Overvoltage Protection

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MCP73123_11 Datasheet, PDF (23/34 Pages) Microchip Technology – Lithium Iron Phosphate (LiFePO4) Battery Charge Management Controller with Input Overvoltage Protection

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6.2 PCB Layout Issues

For optimum voltage regulation, place the battery pack

as close as possible to the deviceâs VBAT and VSS pins

to minimize voltage drops along the high-current-

carrying PCB traces.

If the PCB layout is used as a heatsink, adding multiple

vias in the heatsink pad can help conduct more heat to

the backplane of the PCB, thus reducing the maximum

junction temperature. Figure 6-3, Figure 6-4 and

Figure 6-5 depict a typical layout with PCB heatsinking.

MCP73123/223

FIGURE 6-5:

Typical Layout (Bottom).

FIGURE 6-3:

MCP73X23EV-LFP

Typical Layout (Top).

FIGURE 6-4:

Typical Layout (Top Metal).

ï£ 2011 Microchip Technology Inc.

DS22191C-page 23

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