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MC32BC3770CSR2 bảng dữ liệu(PDF) 4 Page - Freescale Semiconductor, Inc |
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MC32BC3770CSR2 bảng dữ liệu(HTML) 4 Page - Freescale Semiconductor, Inc |
4 / 45 page Analog Integrated Circuit Device Data Freescale Semiconductor 4 BC3770 3 Pin Connections Figure 3. BC3770 Pin Connections (Transparent Top View) Functional descriptions of many of these pins can be found in the Functional Pin Description section beginning on page 13. Table 2. BC3770 Pin Definitions Pin Pin Name Pin Function Formal Name Definition A1, A2 VBUS Input USB/DCP Adapter Input Connect the pins to the output of USB or DCP (dedicated Charging Port) adapter. Bypass with a 2.2 F/10 V ceramic capacitor to the ground, in case the peak voltage on the pins is always below 10 V due to a clamp device. Otherwise, a 2.2 F/25 V or higher rating capacitor is recommended. The two VBUS pins must be connected together externally. These pins are used as an output in OTG mode. An embedded 100 k discharge resistance is enabled in Charge mode. It is disconnected in the Boost mode. A3 VL Output Internal Regulator Output The analog output for internal reference, bandgap and so on. DO NOT LOAD. Bypass with a 1.0 F/10 V to ground. A4 SCL Input Clock Input for FS I2C Serial Interface with the Processor Use a pull-up resistor, 1.5 k to 2.2 k, to the VIO. A5 SDA Input/ Output Data I/O for FS I2C Serial Interface with the Processor Use a pull-up resistor, 1.5 k to 2.2 k, to the VIO. B1 PMID Output VBUS Bypass Output High-side MOSFET connection node and VBUS bypass output. Bypass with a 2.2 F ceramic capacitor to PGND pins as close as possible. Do NOT LOAD any external applications. B2 BOOT High-side MOSFET Driver Supply Bypass BOOT to LX with a 22 nF/10 V ceramic capacitor. B3 BATSNSN Battery - Terminal Sensing Connect to negative terminal of battery cell as close as possible. If a sense resistor is used for a fuel gauge, connect the pin to the ground terminal of the sense resistor. B4 VIO Supply for Internal Buffer Connect to the system I/O supply voltage rail. TRANSPARENT TOP VIEW A B C D E 1 2345 VBUS PMID LX LX PGND VBUS BOOT NO CHG PGND BAT ENB VL BAT GND SH VSYS SNSN DNB SCL VIO BAT VSYS VSYS REG SDA INTB CHG OUT CHG OUT CHG OUT |
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