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Test Summary
Figure 16. The Software Main Window
2.4.7
Power Path Selection
Change the B4 bit (LEARN) of the Control Register to 0. (no learn). Click Write.
Measure
→
V(J8(VSYS)) = 19 V
±
1 V (adapter connected to system)
Observe
→
D10 (ACSW ON) ON, D11 (BATDRV ON) OFF.
Turn off PS1.
Measure
→
V(J8(VSYS)) = 12.3 V
±
300 mV (battery connected to system)
Observe
→
D10 (ACSW ON) OFF, D11 (BATDRV ON) ON, D8 (BYPASS ON) OFF.
Observe
→
The B1 bit (CHGOFF) of the Status Register turns red (charger is not on). The window
should be like
SLUU237 – January 2006
bq24720/21 EVM (HPA104) for Multi-Cell Synchronous
19
Switch-Mode Charger With System Power Selector and SMBus SBS-Like Interface
