Skip to content

Latest commit

 

History

History
129 lines (108 loc) · 6.36 KB

TR_BRD200110R1.0.md

File metadata and controls

129 lines (108 loc) · 6.36 KB
Raw

Overview

TBD : list with links of tests

ToC

Test Summary

Equipment

Equipment Description Serial Number Date of last calibration
Siglent SPD3303C Labo DC Power supply SPD3EEEC6R0513 2022-03-06
Siglent SDL1020X-E DC Electronic Load SDL13GCC6R0182 2022-02-11
Mastech M92 digital multimeter 20011206033 (?)

DuT

PCB number Revision Serial Number Firmware version
BRD200110 1.0

Test incident reports

TIR1

  • Problem: Current is not shut off but output voltage reduced to 3.5V
  • Action: Don't use IP3005A again

TIR2

  • Problem: There's not really a hysteresis. At this voltage it just behaves unstable.
  • Action: Don't use IP3005A again

TIR3

  • Problem: When battery terminal is short circuited, the current is about 200mA, can be up to 350mA. From 400mV battery voltage upwards, the current is limited to 106mA.
  • Action: Take notice.

TIR4

  • Problem: Full charge current should only be applied when battery voltage is above 2.8V. In this circuit, 2.0V seems to be enough for the full charge current. It doesn't make a difference whether CS is pulled-up by 10㏀ or by a 0Ω link.
  • Action:

TIR5

  • Problem: Battery voltage needs to drop to 3.7V (500mV decrease) before the operation mode returns to full charge.
  • Action: Don't use TP5000 part again.

TIR6

  • Problem : Red and green LEDs swapped. Probably wrong LED placed (don't know what component type of placed component is).
  • Action: Check LED component on redesign

TIR7

  • Problem : LEDs not bright enough.
  • Action : Change R28 from 100K to 10K.

TIR8

  • Problem : At 3.6V and up, the battery charger starts charging the battery. The charger current is divided between the load and the battery. At 3.88V the switch-over occurs and all current is diverted to the load.
  • Action : Battery should not be charged as long as it's connected to the load. Voltage comparator switchover should happen when VIN ≥ 4.5V (Minimum voltage for USB & Li-Ion will never reach that voltage). The battery charger enable pin should be switched by the comparator as well, to prevent charging when VIN>UVLO of charger, but smaller than 4.5V.

Test procedures

Protection circuitry test

Test setup

  1. Connect electronic load between CN10.1 & GND.
  2. Connect labo power supply on CN10.

Test steps

Action Expected Result Observed result Status
Over voltage cut off on CN10 4.28V 4.34V TIR1
Over voltage cut recovery on CN10 4.10V 4.34V TIR2
Under voltage cut off on CN10 2.50V 2.54V OK
Under voltage recovery on CN10 3.0V 3.0V OK
Over current 7.0A Can not test, power supply can only deliver 6A TBD

Battery charging

Test setup

  1. Connect labo power supply on CN3
  2. Connect electronic load on CN10, set to CV-mode

Test steps

Li-ion charging profile using constant-current method until battery voltage reaches 4.1 V, followed by ‘top-up’ using constant-voltage technique. (Image source: Texas Instruments)

[Charger 1.5A 3.6-4.2V (TP5000) review](http://lygte-info.dk/review/Review%20Charger%20TP5000%204.2-3.6V%20module%20UK.html) Datasheet proposes a 10㏀ pull-up on CS, but on the TP5000-module it's a solder jumper instead.
Action Expected Result Observed result Status
Input voltage UVLO (rising) min.3.5V, typ. 3.7V, max. 3.9V 3.6V OK
Input voltage UVLO hysteresis min. 150mV, typ. 200mV, max. 300mV 3.31V → 290mV OK
Oscillation frequency min. 650kHz, typ. 800kHz, max. 950kHz 886kHz OK
Trickle start threshold 1.2V 0V TIR3
Minimum battery voltage at power up for 1.0A charge current 2.0V TIR4
Trickle end threshold
Increase voltage at a 10mV/s rate, not faster.		 min. 2.8V, typ.2.9V, max. 3.0V 2.8V OK
Trickle end voltage hysteresis min. 60mV, typ.80mV, max. 100mV 500mV TIR5
Trickle current min. 100mA, typ.113mA, max. 127mA 105mA OK
Charge current at 3.7V 1.0A 1.072A OK
Battery voltage at CC -> CV
Set load to 3.7V, then power up the charger and increase the load voltage		 min. 4.16V, typ. 4.2V, max.4.24V 4.14V OK
Charge termination C/10 min. 87mA, typ. 100mA, max. 113mA 110mA OK
Battery voltage drop for recharge initialization min. 100mV, typ. 150mV, max. 200mV 100mV, 2mA charge current OK
Red LED ON when charge current > 100mA wrong LED on TIR6
Green LED ON when charge current < 100mA && battery voltage > 4.0V wrong LED on TIR6
LED brightness bright enough should be brighter TIR7
Charging efficiency at VBAT=3.7V, VIN=5.0V not specified (VbatIbat)/(VinIin) = (3.75V1.067A) / (4.93V0.91A) = 89% OK

Power source switching

Test setup

  1. Connect labo power supply channel 1 to CN3
  2. Connect labo power supply channel 2 to CN10
  3. DC-load connected on CN7, set to CC=1A
  4. DMM, set to 10A, in series with CH2 of power supply.

Test steps

Action Expected Result Observed result Status
CH1: 0→5.5V, CH2=3.3V switch over at 3.3V rising: 3.39V
falling: 3.24V		 OK
CH1: 0→5.5V, CH2=3.7V switch over at 3.7V battery starts charging while load still connected TIR8
CH1: 0→5.5V, CH2=4.2V switch over at 4.2V rising: 4.33V
falling: 4.10V		 OK
CH1: 0V, CH2: 0→4.2V VBAT<3.0V→load unpowered, VBAT≥3.0V→ battery current to load idem OK
CH1: 5V, CH2: 0→4.2V never on battery current idem OK

Battery voltage indication

Test setup

  1. Connect labo power supply to CN10

Test steps

Action Expected Result Observed result Status
Green LED ON when VIN>2.0V
RED LED ON when 1.6V < VIN < 3.7V

Power consumption

  1. Connect labo power supply channel 1 to CN3
  2. Connect labo power supply channel 2 to CN10
Action Expected Result Observed result Status
CH1: 5V, CH2: 4.2V, Voltage drop from CN3 to CN7 22mV
CH1: 0V, CH2: 4.2V, Voltage drop from CN10 to CN7 22mV
Quiescent current draw from battery 9µA