BQ2947_16 Datasheet, PDF (15/24 Pages) Texas Instruments – Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries

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10 Power Supply Recommendations
The maximum power of this device is 20 V on V_DD.
bq2947
SLUSB15E – SEPTEMBER 2012 – REVISED FEBRUARY 2016
11 Layout
11.1 Layout Guidelines
1. Ensure the RC filters for the Vx pins and VDD pin are placed as close as possible to the target terminal,
reducing the tracing loop area.
2. The capacitor for CD should be placed close to the IC terminals.
3. Ensure the trace connecting the fuse to the gate, source of the NFET to the Pack– is sufficient to withstand
the current during fuse blown event.
11.2 Layout Example
Place the RC filters close to the
device terminals
Power Trace Line
VCELL3
VCELL 2
VCELL 1
VDD
V4
V3
PWPD
V2
OUT
CD
VSS
V1
Pack +
Pack -
Ensure trace can support sufficient current
flow for fuse blow
Figure 19. Layout Example
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