Individual board testing
Resistance measurement with cable attached
- Cable was produced in-house, see TIDIDECS-114 - Getting issue details... STATUS
- There are no serial number on the cables, so for now only using one and assigning it "Cable 01"
- Measuring between banana connector on the cable and test points on the board
| Photo | SENSOR HV | HV GND | AGND | P24V0A | DGND | P24V0D | |
|---|---|---|---|---|---|---|---|
| Cable 01 - Board 38-C00-02 |
| 0.6R | 0.7R | 0.4R | 0.4R | 0.3R | 0.3R |
Initial power-up - only digital board
- Using Rhode & Schwarz HMP4030 power supply
- Only P24V0D connected to channel 2 of the supply
- Using board 38-C00-02
- Started with a current limit set to 10 mA
- Increased the current limit by 1 mA steps until the supply went out of constant-current mode
- This happened at around 130 mA
- Board is consuming 128.2 mA and is steady
- This is 3.08 W
- Lukewarm around the first stage DC/DC converter
- Set the current limit to 160 mA for now
- Test points:
- P5V0 EN = 2.179 V
- P5V0 = 4.988 V
- P0V85 = 0.852 V
- P0V9 = 0.906 V
- P1V2 = 0.103 V
- P1V8 = 0.031 V
- → This seems to indicate that the power sequencing is not working as intended
- The following enable signals must be > 4.5 V for the DC/DC converter (TPSM5D1806) to enable its output:
- ENABLE_P0V9 (R53/R57) =
- ENABLE_P1V2 (R70/R71) =
- ENABLE_P1V8 (R54/R58) =
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