BQ2970 Datasheet, PDF (23/31 Pages) Texas Instruments – Cost-Effective Voltage and Current Protection Integrated Circuit

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bq2970, bq2971, bq2972, bq2973
SLUSBU9C – MARCH 2014 – REVISED MARCH 2016
11 Power Supply Recommendations
The recommended power supply for this device is a maximum 8-V operation on the BAT input pin.
12 Layout
12.1 Layout Guidelines
The following are the recommended layout guidelines:
1. Ensure the external power FETs are adequately compensated for heat dissipation with sufficient thermal
heat spreader based on worst-case power delivery.
2. The connection between the two external power FETs should be very close to ensure there is not an
additional drop for fault sensing.
3. The input RC filter on the BAT pin should be close to the terminal of the IC.
12.2 Layout Example
Power Trace Line
PACK+
PACK–
Power Trace Line
1 NC
2 COUT
3 DOUT
V– 6
BAT 5
VSS 4
Power Trace Line
CSD16406Q3
CSD16406Q3
Power Trace
Via connects between two layers
Figure 33. bq2970 Board Layout
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