Other Parts Discussed in Thread: EV2400, BQ25710
Hi forum,
Thank you in advance for your time.
My design with BQ25713 encounters an issue. When there is only battery attached to the system and no register is set, I measured a voltage at HIDRV1 and HIDRV2 with behavior as shown in Figure 1.
With no DC input connected, the same voltage is transferred to Vbus which caused the charge status reg to show Adapter Present.
If I uncheck the EN_LWPWR, disabling the low power mode, HIDRV1 and HIDRV2's behavior change to as shown in Figure 2 and Figure 3.
Figure 1 HIDRV1 and HIDRV2 with only battery attached
Figure 2 and 3, HIDRV1 and HIDRV2 reset period change from 3.58s to 5.24s for different PCBs.
If I enable HIZ mode, the voltage on HIDRV and Vbus stays around 3.5V.
Comparing to EVM, HIDRV and VBUS should be zero when there is no DC input.
I also attached the screen capture of my schematic and layout.
Please feel free to ask if you spot any error or need more information.
Thank you
Jerry