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L6924UTR 데이터시트(PDF) 6 Page - STMicroelectronics |
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L6924UTR 데이터시트(HTML) 6 Page - STMicroelectronics |
6 / 37 page Pin description L6924U 6/37 Doc ID 14716 Rev 2 Pin I/O Name Pin description 9 I ISEL Switches between high power USB (IUSB up to 500 mA) and low power USB (IUSB/5) in USB mode. A low level sets the L6924U in low power mode and a high level sets the L6924U in high power mode. When the AC mode is selected, the ISEL pin must be connected to ground or left floating. 10 I VOSNS Output voltage sense pin. It senses the battery voltage to control the voltage regulation loop. 11 O VOUT Output pin. (connected to the battery) 12 O VREF External reference voltage pin. (reference voltage is 1.8 V ± 2 %) 13 I/O IEND Charge termination pin. A resistor connected from this pin to GND sets the charge termination current threshold IENDTH: if ICHG < IENDTH, the charge process ends. The voltage across the resistor is proportional to the current delivered to the battery (gas gauge function). 14 I MODE Selects pin AC adapter or USB port input modes. A high level sets the L6924U in USB mode while a low level sets the L6924U in the AC adapter mode. When the AC adapter input is selected, the ISEL pin status does not affect the current set. 15 I IUSB Charge current program pin in USB mode: a resistor connected from this pin to ground sets the fast charge current value (IUSB up to 500 mA) with an accuracy of 7 %. The USB high power/low power mode is selected with the ISEL pin. 16 I IAC Charge current program pin in AC mode: a resistor connected from this pin to GND sets the fast charge current value (IAC up to 1 A) with an accuracy of 7 %. Table 2. Pin functions (continued) |
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