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BQ25895: BATFET(Q4) will turn off (open) when applying higher current

Beginner
Intellectual 2391 points
Part Number: BQ25895

Hi Team,

On customer PCBA, we found BATFET(Q4) will turn off (open) when applying higher current (~1.5A), I attached log file for your reference. 

I can deliver schematic and layout to you offline. Could you kindly look in this case?

Fullscreen Q4.log Download 
Tue Sep 03 11:30:09 CST 2019

Device Name = bq25895M
Firmware Version = 1.00


Sample,DateTime,ElapsedTime,Input_Current_Limit__HIZ_and_ILIM_pin,OTG_Temperature_thresholds__and_Input_Voltage_DPM_Offset,ADC_controls__OTG_Frequency__ICO__DCP__and_Input_Detection,Battery_Load__WDT_Reset_periods__OTG_and_Charge_Enable__and_MINSYS_setting,Fast_Charge_Current_Limit_settings_and_MTK_Pump_enable,Pre-charge_and_Termination_Current_Limit_settings,Charge_Voltage_Regulation_Limit__Battery_Low_Voltage_and_Recharge_threshold,Termination_Current_Enable__STAT_pin__WDT__Safety_Timer__and_JEITA_Charge_Current,IR_Compensation_and_Thermal_Regulation_thresholds,ICO__Extended_Safety_Timer__BATFET_control__MTK_Pump_Voltage__and_JEITA_Charge_Voltage,OTG_Regulation_Voltage_and_Current_Limit_settings,Charger_VBUS__Charging_Mode__PG__USB_Input__and_System_Voltage_Regulation_status,WDT__OTG/VBUS_OVP__Thermal_Shutdown__Safety_Timer__and_TS_pin_faults,Input_Voltage_DPM_settings,Thermal_Regulation_Charge_Status__and_ADC_Battery_Voltage_conversion,ADC_System_Voltage_conversion,ADC_TS_pin_voltage_as_percentage_of_REGN_conversion,VBUS_status__and_ADC_VBUS_Voltage_conversion,ADC_Charge_Current_conversion,DPM_status__and_Input_Current_Limit_setting,Registers_reset__Input_Current_Optimizer_status__Device_ID__and_Temperature_Profile,LogRowTime(ms),LogStatus
1,2019-09-03 11:30:13,4.004,,,,,,,,,,,,,,,,,,,,,,2332,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
2,2019-09-03 11:30:17,8.002,,,,,,,,,,,,,,,,,,,,,,315,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
3,2019-09-03 11:30:21,12.001,,,,,,,,,,,,,,,,,,,,,,327,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
4,2019-09-03 11:30:25,16.001,,,,,,,,,,,,,,,,,,,,,,320,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
5,2019-09-03 11:30:29,20.001,,,,,,,,,,,,,,,,,,,,,,329,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
6,2019-09-03 11:30:33,24.001,,,,,,,,,,,,,,,,,,,,,,323,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
7,2019-09-03 11:30:37,28.001,,,,,,,,,,,,,,,,,,,,,,349,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
8,2019-09-03 11:30:41,32.001,,,,,,,,,,,,,,,,,,,,,,326,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
9,2019-09-03 11:30:45,36.001,,,,,,,,,,,,,,,,,,,,,,319,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
10,2019-09-03 11:30:49,40.001,,,,,,,,,,,,,,,,,,,,,,329,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
11,2019-09-03 11:30:53,44.001,,,,,,,,,,,,,,,,,,,,,,322,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
12,2019-09-03 11:30:57,48.001,,,,,,,,,,,,,,,,,,,,,,316,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
13,2019-09-03 11:31:01,52.001,,,,,,,,,,,,,,,,,,,,,,590,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
14,2019-09-03 11:31:05,56.001,,,,,,,,,,,,,,,,,,,,,,319,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
15,2019-09-03 11:31:09,60.001,,,,,,,,,,,,,,,,,,,,,,328,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
16,2019-09-03 11:31:13,64.001,,,,,,,,,,,,,,,,,,,,,,509,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
17,2019-09-03 11:31:17,68.001,,,,,,,,,,,,,,,,,,,,,,331,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
18,2019-09-03 11:31:21,72.001,,,,,,,,,,,,,,,,,,,,,,325,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
19,2019-09-03 11:31:25,76.001,,,,,,,,,,,,,,,,,,,,,,318,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
20,2019-09-03 11:31:29,80.001,,,,,,,,,,,,,,,,,,,,,,327,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
21,2019-09-03 11:31:33,84.001,,,,,,,,,,,,,,,,,,,,,,321,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
22,2019-09-03 11:31:37,88.001,,,,,,,,,,,,,,,,,,,,,,330,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
23,2019-09-03 11:31:41,92.001,,,,,,,,,,,,,,,,,,,,,,402,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
24,2019-09-03 11:31:45,96.001,,,,,,,,,,,,,,,,,,,,,,317,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
25,2019-09-03 11:31:49,100.001,,,,,,,,,,,,,,,,,,,,,,327,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
26,2019-09-03 11:31:53,104.001,,,,,,,,,,,,,,,,,,,,,,320,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
27,2019-09-03 11:31:57,108.001,,,,,,,,,,,,,,,,,,,,,,330,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
28,2019-09-03 11:32:01,112.002,,,,,,,,,,,,,,,,,,,,,,322,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
29,2019-09-03 11:32:05,116.001,,,,,,,,,,,,,,,,,,,,,,317,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
30,2019-09-03 11:32:09,120.001,,,,,,,,,,,,,,,,,,,,,,326,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
31,2019-09-03 11:32:13,124.001,,,,,,,,,,,,,,,,,,,,,,320,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
32,2019-09-03 11:32:17,128.001,,,,,,,,,,,,,,,,,,,,,,329,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
33,2019-09-03 11:32:21,132.001,,,,,,,,,,,,,,,,,,,,,,323,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
34,2019-09-03 11:32:25,136.001,,,,,,,,,,,,,,,,,,,,,,316,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
35,2019-09-03 11:32:29,140.001,,,,,,,,,,,,,,,,,,,,,,325,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
36,2019-09-03 11:32:33,144.001,,,,,,,,,,,,,,,,,,,,,,319,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
37,2019-09-03 11:32:37,148.001,,,,,,,,,,,,,,,,,,,,,,328,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
38,2019-09-03 11:32:41,152.001,,,,,,,,,,,,,,,,,,,,,,322,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
39,2019-09-03 11:32:45,156.001,,,,,,,,,,,,,,,,,,,,,,315,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
40,2019-09-03 11:32:49,160.001,,,,,,,,,,,,,,,,,,,,,,325,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
41,2019-09-03 11:32:53,164.001,,,,,,,,,,,,,,,,,,,,,,318,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
42,2019-09-03 11:32:57,168.001,,,,,,,,,,,,,,,,,,,,,,2511,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
43,2019-09-03 11:33:01,172.001,,,,,,,,,,,,,,,,,,,,,,321,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
44,2019-09-03 11:33:05,176.001,,,,,,,,,,,,,,,,,,,,,,330,ERROR : Please check C:\Users\cpt4007\Desktop\Q4.log.err
45,2019-09-03 11:33:09,180.001,48,05,31,3A,20,13,82,9D,03,44,93,02,80,13,00,00,00,00,00,08,3A,325,SUCCESS
46,2019-09-03 11:33:13,184.001,7F,06,71,10,09,13,82,8D,03,44,93,02,80,93,45,45,4B,00,00,3F,3A,599,SUCCESS
47,2019-09-03 11:33:17,188.001,7F,06,71,10,09,13,82,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,343,SUCCESS
48,2019-09-03 11:33:21,192.001,7F,06,71,10,09,13,82,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,321,SUCCESS
49,2019-09-03 11:33:25,196.001,7F,06,71,10,09,13,82,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,331,SUCCESS
50,2019-09-03 11:33:29,200.001,7F,06,71,10,09,13,82,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,324,SUCCESS
51,2019-09-03 11:33:33,204.001,7F,06,71,10,09,13,82,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,318,SUCCESS
52,2019-09-03 11:33:37,208.001,7F,06,71,10,09,13,82,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,327,SUCCESS
53,2019-09-03 11:33:41,212.001,7F,06,71,10,09,13,82,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,321,SUCCESS
54,2019-09-03 11:33:45,216.001,7F,06,71,10,09,13,82,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,330,SUCCESS
55,2019-09-03 11:33:49,220.001,7F,06,71,10,09,13,5E,8D,03,44,93,02,00,93,45,45,4C,00,00,3F,3A,324,SUCCESS
56,2019-09-03 11:33:53,224.001,7F,06,71,10,09,13,5E,8D,03,44,93,02,00,93,45,45,4D,00,00,3F,3A,317,SUCCESS
57,2019-09-03 11:33:57,228.001,7F,06,71,10,09,13,5E,8D,03,44,93,02,00,93,45,45,4D,00,00,3F,3A,327,SUCCESS
58,2019-09-03 11:34:01,232.001,7F,06,71,10,09,13,5E,8D,03,44,93,02,00,93,45,45,4D,00,00,3F,3A,320,SUCCESS

  • 0
    TI__Guru 57541 points

    Hi,

    What are your test conditions such as VBUS, VBAT, IBAT, VSYS, ISYS? Could you please provide all register values of the charger?

    Thanks,

    Ning.

  • 0 in reply to Ning T
    TI__Intellectual 2391 points

    Here is the register settings? Apply 5V,2A on VBus, VBAT is ~ 3.7 voltage? Would like to know the purpose that charger turn off Q4 w/o error message.

    Fullscreen Charger setting.txt Download 
    * Created: Fri Aug 23 11:29:38 CST 2019
*
* Format: Register Name  tab Character,\t  Hexadecimal register value.
* Device: bq25895M
* BQZ Container: Charger_1_00-bq25895M.bqz
*
Input Current Limit, HIZ and ILIM pin	17
OTG Temperature thresholds, and Input Voltage DPM Offset	0D
ADC controls, OTG Frequency, ICO, DCP, and Input Detection	20
Battery Load, WDT Reset periods, OTG and Charge Enable, and MINSYS setting	10
Fast Charge Current Limit settings and MTK Pump enable	4F
Pre-charge and Termination Current Limit settings	F4
Charge Voltage Regulation Limit, Battery Low Voltage and Recharge threshold	5C
Termination Current Enable, STAT pin, WDT, Safety Timer, and JEITA Charge Current	0D
IR Compensation and Thermal Regulation thresholds	03
ICO, Extended Safety Timer, BATFET control, MTK Pump Voltage, and JEITA Charge Voltage	64
OTG Regulation Voltage and Current Limit settings	00
Charger VBUS, Charging Mode, PG, USB Input, and System Voltage Regulation status	06
WDT, OTG/VBUS OVP, Thermal Shutdown, Safety Timer, and TS pin faults	00
Input Voltage DPM settings	0D
Thermal Regulation Charge Status, and ADC Battery Voltage conversion	00
ADC System Voltage conversion	00
ADC TS pin voltage as percentage of REGN conversion	00
VBUS status, and ADC VBUS Voltage conversion	99
ADC Charge Current conversion	00
DPM status, and Input Current Limit setting	17
Registers reset, Input Current Optimizer status, Device ID, and Temperature Profile	3A

  • 0 in reply to Beginner
    TI__Guru 57541 points

    Hi,

    This thread is handled via separate channel and is considered closed hereby.

    Thanks,

    Ning.