Hello. I have a problem with this device, everything works except that the battery does not charge. The measurements in BQ24780S with the battery are:

1-ACN: 20,3
2-ACP: 20,3
3-CMSRC: 20,3
4-ACDRV: 26,2
5-ACOK: 3,3
6-ACDET: 2,8
7-IADP: 0,01
8-IDCHG: 0
9-PMON: 0,01
10-PROCHOT#: 0
11-SDA: 3,3
12-SCL: 3,3
13-CMPIN: 1
14-CMPOUT: 1
15-BATPRES#: 0,3
16-TB_STAT#: 1,42
17-BATSRC: 7,6
18-BATSRC: 7,6
19-SRN: 7,6
20-SRP: 7,6
21-ILIM: 1,42
22-GND: 0
23-LODRV: 0
24-REGN: 6
25-BTST: 7,20
26-HIDRV: 7,6
27-PHASE: 7,6
28-VCC: 20

I have changed BQ24780S, battery, AC adapter, and checked mosfets, and nothing. Help me please.

18 should be BATDRV. Check this voltage before plugging in the adapter. "BATDRV voltage is 6V above BATSRC to turn on BATFET"

Thanks for the observation. It was an error when transcribing the data. Sorry.

Then I write the corrected measurements again:

1-ACN: 20.3
2-ACP: 20.3
3-CMSRC: 20.3
4-ACDRV: 26.2
5-ACOK: 3.3
6-ACDET: 2.8
7-IADP: 0.01
8-IDCHG: 0
9-PMON: 0.01
10-PROCHOT #: 0
11-SDA: 3.3
12-SCL: 3.3
13-CMPIN: 1
14-CMPOUT: 1
15-BATPRES #: 0.3
16-TB_STAT #: 1.42
17-BATSRC: 7.6
18-BATDRV: 7.6
19-SRN: 7.6
20-SRP: 7.6
21-ILIM: 1.42
22-GND: 0
23-LODRV: 0
24-REGN: 6
25-BTST: 7.20
26-HIDRV: 7.6
27-FASE: 7.6
28-VCC: 20

I will review BATDRV.

Finalmente no encontre la solucion. Tras comprobar los componentes uno a uno no di con la averia.

Cierro el hilo.

Gracias por su ayuda.