Eval » Historie » Version 3
Maximilian Seesslen, 06.10.2025 13:15
| 1 | 1 | Maximilian Seesslen | h1. Eval |
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| 2 | |||
| 3 | h2. New Features compared to mainswitch |
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| 4 | |||
| 5 | * More current |
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| 6 | * Fix Wakeup |
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| 7 | * Periodic wakeups to make measurements: RTC |
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| 8 | * Diode ? Voltage-Drop issue |
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| 9 | ** Ideal diode with Mosfet |
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| 10 | * High voltage (24V) ? |
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| 11 | ** Different connectors |
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| 12 | * Global Timeserver; It already has batteries |
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| 13 | * Real touch keys |
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| 14 | * Over-Temperature power off (PCB/Box) |
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| 15 | * Buzzer? |
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| 16 | ** indicate peridoc on/off during day time |
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| 17 | |||
| 18 | * 4 Sectionen: SZ, WZ, MEMS, ? |
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| 19 | ** Stoeren ungepowerte Platinen CAN? |
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| 20 | 2 | Maximilian Seesslen | ** Erzwingt Sternkonstelation |
| 21 | 1 | Maximilian Seesslen | |
| 22 | h2. Components |
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| 23 | |||
| 24 | Ideal Diode: |
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| 25 | |||
| 26 | * VN7140ASTR; up to 0,280 ohm, 0,120 Ohm typical |
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| 27 | * LTC4412; 2,9V; TME 2.60EUro; External P-MOSFET needed; Waere perfekt gewesen; load sharing |
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| 28 | * TPS2410 N.A. |
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| 29 | * LM5050 |
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| 30 | * MAX40200; 1A only, no external MOSFET |
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| 31 | * LM74700 |
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| 32 | |||
| 33 | LTC4412 is the only available |
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| 34 | |||
| 35 | TMP1075; TMP1075NDRLR; 0,31€ |
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| 36 | Muesste noch viel rumliegen haben |
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| 37 | |||
| 38 | h2. Calculations |
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| 39 | |||
| 40 | * 240V/600mA eigentlich ausreichend; 144W |
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| 41 | * AQH3213A |
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| 42 | * STM32F030K6T6 should draw 20µA in stop |
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| 43 | * 700mAh=700000µAh |
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| 44 | * 700000µAh/20µA=3500h=1458d=ca 4 years |
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| 45 | |||
| 46 | h2. MCU |
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| 47 | |||
| 48 | * "Find":https://www.tme.eu/de/katalog/st-mikrocontroller_112866/?params=375:1453589,1453450,1853043,1634756,1634761,1938598,1473784,1613924;3461:1979124,1979125 |
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| 49 | * STM32F072C8T6 |
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| 50 | ** 2V, ok, Entladeaschlussspannung |
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| 51 | ** Nur LQFP48; 4.53Euro |
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| 52 | ** 1,85 € Reichelt STM32F072CBT6 128KB Flash |
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| 53 | * STM32H503CBT6, "STM32H503KBU6":https://www.tme.eu/Document/e92fcde7cdebb20ebbd5639f57dc7863/stm32h503cb.pdf |
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| 54 | ** 3.20Euro |
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| 55 | * Fuer VBAT wird beim STM32H503KBU6 auch FQFP48 benoetigt. |
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| 56 | |||
| 57 | h2. Issues |
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| 58 | |||
| 59 | h3. Wie Straenge schalten |
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| 60 | |||
| 61 | * 4 x LTC4412 umstaendlich, E.g. status ruecklesen |
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| 62 | * Jeweils 2 Mosfets notwendig um zu isolieren, klein + gross |
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| 63 | 3 | Maximilian Seesslen | * Wozu Stränge? |