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BQ24725ARGRR Datasheet(PDF) 28 Page - Texas Instruments |
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BQ24725ARGRR Datasheet(HTML) 28 Page - Texas Instruments |
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28 / 47 page  VCC BATDRV REGN BTST HIDRV PHASE LODRV GND SRP SRN Q4 Sis412DN L1 4.7µH SYSTEM C10 10µF RSR 10m? R1 430 kW R2 66.5 kW C2 0.1µF U1 bq24725A C8 10uF Q3 Sis412DN Q5 (BATFET) FDS6680A C7 0.047µF Adapter + RAC 10m? Pack + C13 0.1µF C6 1µF HOST Dig I/O SMBus +3.3V C4 100 pF R4 R5 R7 316 kW ACN ACP CMSRC ACDRV ACDET ILIM SDA SCL ACOK IOUT Ci 2.2µF Ri 2? D2 BAT54C R9 10 R3 10 kW R8 100 kW R10 4.02 kW R11 EN D1 BAT54 C14 0.1µF C9 10uF C11 10µF Pack - C3 0.1µF C5 1µF R6 C1 0.1µF Total Csys 220µF C15 0.01µF C16 0.1µF C17 2200pF Adapter - ADC U2 IMD2A Q1 (ACFET) FDS6680A Q2 (RBFET) FDS6680A PowerPad R12 1M R13 3.01M Q6 BSS138W Reverse Input Protection Dig I/O EN R14 10 Ω R15 7.5 W * * 4.02 kW 10 kW 10 kW 4.02 kW * * * bq24725A SLUSAL0A – SEPTEMBER 2011 – REVISED AUGUST 2014 www.ti.com 9 Application and Implementation 9.1 Application Information The bq24725AEVM-710 evaluation module (EVM) is a complete charger module for evaluating the bq24725A. The application curves were taken using the bq24725AEVM-710. Refer to the EVM user's guide (SLUU507) for EVM information. 9.2 Typical Application Fs = 750kHz, IADPT = 4.096A, ICHRG = 2.944A, ILIM = 4A, VCHRG = 12.592V, 90W adapter and 3S2P battery pack Use 0 Ω for better current sensing accuracy, use 10Ω/7.5Ω resistor for reversely battery connection protection. See application information about negative output voltage protection for hard shorts on battery to ground or battery reversely connection. The total Csys is the lump sum of system capacitance. It is not required by charger IC. Use Ri and Ci for adapter hot plug-in voltage spike damping. See application information about input filter design. Figure 18. Typical System Schematic with Two NMOS Selector 28 Submit Documentation Feedback Copyright © 2011–2014, Texas Instruments Incorporated Product Folder Links: bq24725A |
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