MobileRead Forums - View Single Post - Aura H2O tps65185_int_func under-voltage on DCDC1 detected !

DomesticExtremis · 10-13-2019, 09:11 PM

DCDC2 (part application circuit attached below) is checked first as it needs to be up and running before DCDC1 is powered up, so any faults here might be preventing DCDC1 from working.
Pins 24,25 and 26 are directly connected to the DCDC2 subsystem, in addition pins 4 and 16 are linked by an external rail and their attached support components need to be checked also. Pin numbers and component identifiers have been added in red.

Code:

Pin#    Pin name        Components
----  -----------     -------------------
24       VIN_P         C315
25       VN_SW         D49, L31, C320 (+C321)
25       VN            output to pins 4 and 16
   
4        VNEG_IN       C317       

16       VCOM_PWR     C323 (+C316 +C324)

Capacitors in brackets are additional to those on the circuit diagram and are extra capacitors in parallel to the one shown.

10-13-2019, 09:11 PM	#31
DomesticExtremis Addict Posts: 243 Karma: 359054 Join Date: Nov 2012 Device: default	DCDC2 DCDC2 (part application circuit attached below) is checked first as it needs to be up and running before DCDC1 is powered up, so any faults here might be preventing DCDC1 from working. Pins 24,25 and 26 are directly connected to the DCDC2 subsystem, in addition pins 4 and 16 are linked by an external rail and their attached support components need to be checked also. Pin numbers and component identifiers have been added in red. Code: Pin# Pin name Components ---- ----------- ------------------- 24 VIN_P C315 25 VN_SW D49, L31, C320 (+C321) 25 VN output to pins 4 and 16 4 VNEG_IN C317 16 VCOM_PWR C323 (+C316 +C324) Capacitors in brackets are additional to those on the circuit diagram and are extra capacitors in parallel to the one shown. Attached Thumbnails Last edited by DomesticExtremis; 10-13-2019 at 09:15 PM.