Tool/software:
Hi, I'm working on a power management system that utilises this IC but I'm currently struggling to initiate a charge.
Here's a quick picture of my schematics in case there are any obvious issues with it:
I've copied the example layout for the components (I have also used this IC successfully before in a preivous, simpler design) so I am confident my layout is correct however my last design only had one input source.
I've got a partially charged (14v) 4s lithium battery connected and I've applied 20v to VAC1. From reading the registers, I can see that VBUS and VBAT are both seeing the voltage of the charger and the pack correctly, so I think the input selector FET's are enabling properly. The STAT light comes on solid when the charger is connected, but there is no measurable current draw from the charger. I'm able to draw current through SYS from the battery, but if I disconnect the battery and leave the charger connected there is only 1.7v present at SYS.
I've read out the registers I've seen requested in other posts about the same IC but I don't think I can see anything in here that should prevent it from charging:
Register 1B = 00001011
Register 1C = 01101010
Register 1D = 00000001
Register 1E = 11000000
Register 1F = 00000000
Register 20 = 00000000
Register 21 = 00000000
Register 22 = 11101011
Register 23 = 10010010
Register 24 = 01000000
Register 25 = 00000000
Register 26 = 00000000
Let me know if I've missed anything to check! If everything checks out here I guess I'll swap the IC out and see if I damaged at in some way during the assembly.
Cheers,
- Daniel
