Datasheet

Circuit Module Physical Layouts and Bill of Materials

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Table 2. Components and Flash-Memory Settings for Different Pre-charge

Modes

MODE RESISTORS PRECHG FET ZVCHG1 ZVCHG0

1. ZVCHG FET R23 Q4 0 0

2. Not defined N/A N/A 0 1

3. Not defined N/A N/A 1 0

4. No action N/A N/A 1 1

For more details about pre-charge operation and mode choices, see the bq3060 data sheet (SLUS928).

3.3 Testing Fuse-Blowing Circuit

To prevent the loss of board functionality during the fuse-blowing test, the actual chemical fuse is not

provided in the circuit. FET Q3 drives TP5 low if a fuse-blow condition occurs (a pull-up at TP5 is

required); so, monitoring TP5 can be used to test this condition.

4 Circuit Module Physical Layouts and Bill of Materials

This section contains the board layout, bill of materials, and assembly drawings for the bq3060/bq29412

circuit module.

NOTE: The optional zener diode (D4) and resistor (R32) on the SYS PRES pin, which are only

required if SYS PRES has a chance to short to PACK+, are not available on REV. A EVM.

4.1 Board Layout

This section shows the dimensions, PCB layers (Figure 1 through Figure 7), and assembly drawing for the

bq3060 module.

Figure 1. bq3060EVM-001 Layout (Silk Screen)

bq3060EVM-001 SBS 1.1 Compliant Advanced Gas Gauge Battery SLUU342–October 2009

Management Solution EVM

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