BMS Electrical Notes¶
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Battery Voltage: 24V
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Cells: P42A
Also see the Batemo Model for this cell
Standby/Shutoff Currents¶
copy from Notion - BMS C.1
According to the following table, the idle current is assumed to be somewhere around 110 µA, which is well within the requirements. Note that this is a worst-case estimate, modeling the buck converter as linear regulator.
| Part | Designator | Current | Net | Comment |
|---|---|---|---|---|
| INA180A4 | U7 | 80 µA | 5V | input bias current (total or per input?) |
| BQ76200 | U6 | 10 µA | BAT+ | |
| STM32 | U1 | < 10 µA | VCC | shutdown mode, RTC active, LSE in high drive mode (?) |
| R 1M 1% 0402 | R16 | 3.3 µA | VCC | 3V3 net EN pull-up resistor |
| LMR36502 | U9 | 1.5 µA | BAT+ | 5V Buck regulator |
| BQ76925 | U2 | 1.5 µA | BAT+ | analog frontend |
| PMZB1200UPEYL | Q11 | 1 µA | VCC | drain leakage current |
| PMZB1200UPEYL | Q8 | 1 µA | BAT+ | drain leakage current |
| NX7002BKMB | Q9 | 1 µA | BAT+ | drain leakage current |
| BZX585-B27 | D11 | 50 nA | BAT+ | hold-up circuit clamping zener diode |
| TPS7A0233 | U11, U13 | 25 nA | 5V | |
| PTVS54VS1UR | D13 | 1 nA | BAT+ | BAT+/BAT- TVS diode |