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AN2390 データシート(PDF) 9 Page - STMicroelectronics |
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AN2390 データシート(HTML) 9 Page - STMicroelectronics |
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9 / 42 page  AN2390 Evaluation board implementation 9/42 2 Evaluation board implementation 2.1 Charging circuitry The evaluation board implements a solution with an external low-voltage DC supply. To obtain a constant voltage or constant current during various stages, the ST7 microcontroller measures the battery voltage (VBAT) and current (IBAT). Along with this feedback, it provides the regulated output power to the battery under charge using a non- inverting buck-boost converter circuit. The buck boost converter is controlled by 2 PWM signals coming from the microcontroller as shown in basic circuit diagram (Figure 4). For more details on the buck/boost converter, please refer to AN2389. Figure 4. Basic circuit diagram of MCU-based non-inverting buck-boost converter PWM1 PWM2 VOUT C d1 P- P+ L d2 |
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