Eval » Historie » Revision 6
Revision 5 (Redmine Admin, 10.12.2021 15:17) → Revision 6/8 (Redmine Admin, 13.12.2021 13:05)
h1. Eval
h2. Battery life
"Unterschwelleneffekt":https://de.wikipedia.org/wiki/Unterschwelleneffekt / leakage current
Buzzer is now driven by MOSFET. The "Zero Gate Voltage Drain Current" is relevant for battery life in unused status.
"Nexpedia":https://assets.nexperia.com/documents/user-manual/Nexperia_document_book_MOSFETGaNFETApplicationHandbook_2020.pdf
Most manufactures specify an "Zero Gate Voltage Drain Current" of 1µA at 20-30V. Temperature has an big impact.
Vergleichen mit verwendetem Transistor;
"NPN":https://www.reichelt.de/bipolartransistor-npn-45-v-0-5-a-0-225-w-sot-23-bcx-19-smd-p90184.html (3.2.2019)
IE scheint 0, ICB ist mit 100nA angegeben
Einfach Messen... ist sowieso ein guter Geraete-Test
The MCU STM32L031x4 runs with 1.65V to 3.6V. "Battery1":https://docs.rs-online.com/fae6/A700000008139582.pdf "Battery2":https://docs.rs-online.com/01fa/0900766b817143bf.pdf specify a capacity of 235mAh to 2.0 volts
LEDs should be visible at 2Volts.
h2. Battery life
"Unterschwelleneffekt":https://de.wikipedia.org/wiki/Unterschwelleneffekt / leakage current
Buzzer is now driven by MOSFET. The "Zero Gate Voltage Drain Current" is relevant for battery life in unused status.
"Nexpedia":https://assets.nexperia.com/documents/user-manual/Nexperia_document_book_MOSFETGaNFETApplicationHandbook_2020.pdf
Most manufactures specify an "Zero Gate Voltage Drain Current" of 1µA at 20-30V. Temperature has an big impact.
Vergleichen mit verwendetem Transistor;
"NPN":https://www.reichelt.de/bipolartransistor-npn-45-v-0-5-a-0-225-w-sot-23-bcx-19-smd-p90184.html (3.2.2019)
IE scheint 0, ICB ist mit 100nA angegeben
Einfach Messen... ist sowieso ein guter Geraete-Test
The MCU STM32L031x4 runs with 1.65V to 3.6V. "Battery1":https://docs.rs-online.com/fae6/A700000008139582.pdf "Battery2":https://docs.rs-online.com/01fa/0900766b817143bf.pdf specify a capacity of 235mAh to 2.0 volts
LEDs should be visible at 2Volts.