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Prototype v1.0 Testing Protocol #86

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26 of 41 tasks
Informaticore opened this issue Apr 27, 2021 · 4 comments
Open
26 of 41 tasks

Prototype v1.0 Testing Protocol #86

Informaticore opened this issue Apr 27, 2021 · 4 comments

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@Informaticore
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Informaticore commented Apr 27, 2021 •
edited by MantaRayDeeJay
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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.

  1. 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
  1. 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.
  1. 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.
  1. Using more than 1 battery cell

Buck-Boost 3.3V (TPS63060)
3v3_enable pin = 3.3V

  1. 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)
  1. 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)
  1. 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

  1. 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)
  1. 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
  1. 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)
@dr-stefan-krank
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dr-stefan-krank commented May 2, 2021 •
edited
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  • Noticeable coil whining on different loads for 3v3 MCU regulator.
  • LED2 for SMBALERT lights up when RTC cuts of power to the ESP. Most likely GPIO32 goes into pulldown at power loss.

@MantaRayDeeJay
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MantaRayDeeJay commented May 14, 2021 •
edited
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SOT23-3 DMN3023L MOSFETs correction :

image
2021_0514_164021_003

@MantaRayDeeJay
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* Noticeable coil whining on different loads for 3v3 MCU regulator.

Ceramic capacitor whinings come from a "not good working" of the LTC4162-L chip due to the SOT23-3 DMN3023L MOSFETs issue

@MantaRayDeeJay
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MantaRayDeeJay commented Jul 24, 2021 •
edited
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Ibat Rsense (R20) :
Currently, the resistor used is a 0805 68mohm 0,25W
Buck-Boost chips can sink more than 2A from the battery.
In this case, vsns = 32mV x4 (128mV) @ I=2A -> 0,256W.
There are 2 chips on board, so Power can raise about 0,5W.
I recommand to replace the 0805 0,25W by a 1206 1W resistor as ERJ8BWFR068V.

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@Informaticore @MantaRayDeeJay @dr-stefan-krank