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AN2390 bảng dữ liệu(PDF) 17 Page - STMicroelectronics

tên linh kiện AN2390
Giải thích chi tiết về linh kiện  A flexible universal battery charger
PDF  42 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2390 bảng dữ liệu(HTML) 17 Page - STMicroelectronics

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AN2390
Evaluation board implementation
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2.3
MCU software
2.3.1
Architecture
The software provided in this demo has state machine architecture. To explain more, various
charging states can be defined for each slot. Each slot is driven by its state machine, with
some interactions to implement front slot priority.
In order to measure the charge time, a timekeeper is implemented and counters are
incremented periodically. Most of the time, slot states are unchanged. This implies that the
PWM duty cycle, charge enable signals and LED on/off states are constant. Periodically, the
ST7 microcontroller measures the battery current, battery voltage and thermistor voltage of
both slots. Using the measurements and the timekeeper values, it updates slot states and
the output configuration. If necessary, it resets the timekeeper.



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