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BQ27743 Datasheet(PDF) 3 Page - Texas Instruments |
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BQ27743 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 42 page  A B C D E 3 2 1 Not to scale DSG PACKP SDA INT/PSC SCL CHG PRES BAT HDQ/PSD TS SRP SRN VPWR VSS REG25 3 bq27743 www.ti.com SLUSCM0A – JUNE 2017 – REVISED SEPTEMBER 2018 Product Folder Links: bq27743 Submit Documentation Feedback Copyright © 2017–2018, Texas Instruments Incorporated (1) I/O = Digital input/output, IA = Analog input, P = Power connection 6 Pin Configuration and Functions Pin Functions NAME NUMBER I/O DESCRIPTION SRP A1 I(1) Analog input pin connected to the internal coulomb counter where SRP is nearest the PACK+ connection. Connect to sense resistor. CHG A2 O External high side N-channel charge FET driver DSG A3 O External high side N-channel discharge FET driver SRN B1 I Analog input pin connected to the internal coulomb counter where SRN is nearest the CELL+ connection. Connect to sense resistor. PRES B2 I System present open-drain input that requires an external pullup when used or connected to VSS when not used. PACKP B3 I Pack voltage measurement input for protector operation VPWR C1 — Power input. Decouple with 0.1-µF ceramic capacitor to VSS. BAT C2 I Cell-voltage measurement input. ADC input SDA C3 IO Slave I2C serial communications data line for communication with system. Open-drain I/O. Use with 10-kΩ pullup resistor (typical). VSS D1 — Device ground HDQ/PSD D2 I/O Protection synchronization for the discharge FET push pull I/O or this can be used as one-wire HDQ communications. INT/PSC D3 IO Protection synchronization for the charge FET open-drain I/O. This requires an external pullup or it can be used as an interrupt output to the host system for the BTP feature. REG25 E1 — Regulator output and bq27743 processor power. Decouple with 1.0-µF ceramic capacitor to VSS. TS E2 I Pack thermistor voltage sense (use 103AT-type thermistor). ADC input SCL E3 IO Slave I2C serial communications clock input line for communication with system. Use with 10-kΩ pullup resistor (typical). (1) Production tested in the following configuration: VOVP = 4.450 V, VUVP = 2.438 V, VOCC = 28 mV, VOCD = 83 mV, and VSCD = 148 mV. Table 1. Hardware Protection Thresholds(1) OVERVOLTAGE PROTECTION (VOVP) UNDERVOLTAGE PROTECTION (VUVP) OVERCURRENT IN CHARGE (VOCC) OVERCURRENT IN DISCHARGE (VOCD) SHORT-CIRCUIT IN DISCHARGE (VSCD) 4.450 V 2.438 V 6 mV 14 mV 73 mV 24 mV 13 mV 34 mV 44 mV 18 mV 53 mV 148 mV 63 mV 28 mV 73 mV 83 mV |
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