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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L6924U датащи(PDF) 31 Page - STMicroelectronics |
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L6924U датащи(HTML) 31 Page - STMicroelectronics |
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31 / 37 page  L6924U Additional applications information Doc ID 14716 Rev 2 31/37 Figure 25. Demonstration board schematic Table 7. Demonstration board components description Name Value Description R1 24 k Ω AC mode fast-charge current resistor. Used to set the charging current in AC mode. R2 24 k Ω USB mode fast-charge current resistor. Used to set the charging current in USB mode. R3 3.3 k Ω End of Charge current resistor. Used to set the termination current and, as a “gas gauge” when measuring the voltage across on it. R4 1 k Ω Pull up resistor. Connected between VREF and TH pin. R5 1 k Ω Pull up resistor. To be used when the ST1 is connected to a LED R6 1 k Ω Pull up resistor. To be used when the ST2 is connected to a LED. RT1 470 Ω If a NTC is not used, a half value of R4 must be mounted to keep the TH voltage in the correct window. C1 1 µF Input capacitor. C2 4.7 µF Output capacitor. C3 10 nF TMAX capacitor. Used to set the maximum charging time. C4 1 nF VREF filter capacitor. D1 GREEN ST1 LED. D2 RED ST2 LED. J1 ST2 jumper. Using to select the LED or the external microcontroller. J2 ST1 jumper. Using to select the LED or the external microcontroller. J3 SD jumper. If open, the device is in shutdown mode; when closed, the device starts to work. J4 Low power/ high power USB mode selection jumper. J5 AC/USB mode selection jumper. |
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