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BQ25700ARSNR Datasheet(PDF) 6 Page - Texas Instruments |
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BQ25700ARSNR Datasheet(HTML) 6 Page - Texas Instruments |
6 / 82 page 6 bq25700A SLUSCQ8 – MAY 2017 www.ti.com Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated Pin Functions (continued) PIN I/O DESCRIPTION NAME NUMBER SRN 19 PWR Charge current sense resistor negative input. SRN pin is for battery voltage sensing as well. Connect SRN pin with optional 0.1-μF ceramic capacitor to GND for common-mode filtering. Connect a 0.1-μF ceramic capacitor from SRP to SRN to provide differential mode filtering. The leakage current on SRP and SRN are matched. For reverse battery plug-in protection, 10-Ω series resistors are placed on SRP and SRN. SRP 20 PWR Charge current sense resistor positive input. Connect 0.1-μF ceramic capacitor from SRP to SRN to provide differential mode filtering. The leakage current on SRP and SRN are matched. For reverse battery plug-in protection, 10-Ω series resistors are placed on SRP and SRN. Connect SRP pin with optional 0.1-uF ceramic capacitor to GND for common-mode filtering. SW1 32 PWR Buck mode high side power MOSFET driver source. Connect to the source of the high side n-channel MOSFET. SW2 23 PWR Boost mode high side power MOSFET driver source. Connect to the source of the high side n-channel MOSFET. VBUS 1 PWR Charger input voltage. An input low pass filter of 1Ω and 0.47 µF (minimum) is recommended. VDDA 7 PWR Internal reference bias pin. Connect a 10-Ω resistor from REGN to VDDA and a 1-μF ceramic capacitor from VDDA to power ground. VSYS 22 PWR Charger system voltage sensing. The system voltage regulation limit is programmed in REG0x15() and REG0x3E(). Thermal pad – – Exposed pad beneath the IC. Analog ground and power ground star-connected near the IC's ground. Always solder thermal pad to the board, and have vias on the thermal pad plane connecting to power ground planes. It also serves as a thermal pad to dissipate the heat. |
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