Prototype v1.0 Testing Protocol #86
Description
General
- USB-C Delivers 5V when connected
- USB-UART connection established
- auto Flashing ESP32
- enable 3.3V via GPIO
- enable 5V via GPIO
- i2C detect LTC
- i2C detect RTC
- Load test 3.3V
- Load test 5V
- RGB LED test
- Reset button test
- Wake button test (RTC)
- Timed sleep and wakeup (RTC)
- Wake on power on test (RTC)
- [ ]
- ... TBD
LTC4162-L
CAUTION : There is a SOT23-3 pin configuration issue with the 2 Power Path MOSFETs DMN3023L (Q3 & Q15)
1st apply the workaround by replacing the SOT23-3 chip 120° Left.
- Power Check
- Internal +5V Regulator (INTVcc) Pin 2 -> measured 4.8V
- Internal +2.5V Regulator (VCC2P5) Pin 8 -> measured 2.5V
- +3.3V for I2C IO (DVCC) Pin 15
- Power Path Check
- IN_FET (pin 6) signal when the board is powered from an external power source with or without a battery. (Expected value : about Vin + 5V)
- BAT_FET (pin 22) signal when the board is powered from a battery ONLY. (Expected value : about Vbat+ + 5V)
- Vout (pin 27 & 28) is about equal to Vin when the board is powered from an external source and about equal to Vbat+ when the board is ONLY powered from the battery.
- Battery Charging Check
@ VBat=3.20V or less and @ Iload=0mA.
- When starting the charging process, the charging current is near 500mA or less.
- First, there is a Constant Current charging process (CC mode) and then a Constant Voltage charging process (CV mode) up to about 4.20V or a bit less.
- The battery protection chip doesn't disconnect the battery while the battery charging process.
- Using more than 1 battery cell
Buck-Boost 3.3V (TPS63060)
3v3_enable pin = 3.3V
- Buck-Boost transitions
- While battery charging process, there is no load interruption from boost to buck mode (with Lipo 1 cell only)
- While battery discharging process, there is no load interruption from buck to boost mode (with Lipo 1 cell only)
- Buck Mode : 3.3V<Vbat<12.0V
- @ Iout=0mA (no load) :
- 3.3V Vout = 3.3V : 3.41V mesured on DUPONT connector with a ohmtec 254087 multimeter (TPS63060 Vout=3.41V)
- @ Iout=500mA :
- 3.3V Vout = 3.3V : 3.24V mesured on DUPONT connector with a ohmtec 254087 multimeter (TPS63060 Vout=3.30V)
- @ Iout=1000mA :
- 3.3V Vout = 3.3V : 3.18V mesured on DUPONT connector with a ohmtec 254087 multimeter (TPS63060 Vout=3.30V)
- @ Iout=1500mA :
- 3.3V Vout = 3.3V : 2.65V mesured on DUPONT connector with a ohmtec 254087 multimeter (TPS63060 Vout=2.82V and the board is hot)
- Boost Mode : 2.8V<Vbat<3.3V
- @ Iout=0mA (no load) :
- 3.3V Vout = 3.3V
- @ Iout=500mA :
- 3.3V Vout = 3.3V
Buck-Boost 5.0V (TPS63060)
5v0_enable pin = 3.3V
- Buck-Boost transitions
- While battery charging process, there is no load interruption from boost to buck mode (with Lipo 2 cell only)
- While battery discharging process, there is no load interruption from buck to boost mode (with Lipo 2 cell only)
- Buck Mode : 5.0V<Vbat<12.0V
- @ Iout=0mA (no load) :
- 5.0V Vout = 5.0V
- @ Iout=500mA :
- 5.0V Vout = 5.0V
- @ Iout=1000mA :
- 5.0V Vout = 5.0V
- Boost Mode : 2.8V<Vbat<5.0V
- @Iout=0mA (no load) :
- 5.0V Vout = 5.0V
- @Iout=500mA :
- 5.0V Vout = 5.0V
Battery Protection IC (AP9101Cxxx-AYTRG1)
- While battery discharging process, the battery is disconnected when the battery voltage reaches 2.800V (Over-Discharge cut-off)
- While battery charging process, the battery is disconnected when the battery voltage reaches 4.275V (Over-Charge cut-off)