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BQ24707A Datasheet(PDF) 3 Page - Texas Instruments |
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BQ24707A Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 44 page  1 2 3 4 5 6 7 8 9 10 15 14 13 12 11 20 19 18 17 16 ACN ACP CMPOUT CMPIN ACOK IFAULT SRN SRP GND LODRV bq24707 bq24707A bq24707, bq24707A www.ti.com SLUSA78C – JULY 2010 – REVISED JULY 2015 5 Device Comparison Table CONDITION bq24707 bq24707A ACOK default delay 1.3 s 1.2 ms Suggest fully charged battery ChargeVoltage() setting Full scale charge voltage(12.592 V for 3-S battery) 0 V after termination Suggest fully charged battery ChargeCurrent() setting 0 A 0 A after termination 6 Pin Configuration and Functions RGR Package 20-Pin VQFN Top View Pin Functions PIN DESCRIPTION NAME NO. Adapter detection input. Program the adapter valid input threshold by connecting a resistor-divider from the adapter ACDET 6 input to the ACDET pin to the GND pin. When the ACDET pin is above 0.6 V and VCC is above UVLO, REGN LDO is present, ACOK comparator and IOUT are both active. Input current-sense resistor negative input. Place an optional 0.1-µF ceramic capacitor from ACN to GND for common- ACN 1 mode filtering. Place a 0.1-µF ceramic capacitor from ACN to ACP to provide differential-mode filtering. AC adapter detect open-drain output. The output is pulled LOW to GND by an internal MOSFET when the voltage on the ACDET pin is above 2.4 V, voltage on the VCC pin is above UVLO and voltage on the VCC pin is 245 mV above ACOK 5 the voltage on the SRN pin, indicating a valid adapter is present to start charge. If any one of the above conditions cannot meet, it is pulled HIGH to the external pullup supply rail by an external pullup resistor. Connect a 10-k Ω pullup resistor from the ACOK pin to the pullup supply rail. Input current-sense resistor positive input. Place a 0.1-µF ceramic capacitor from ACP to GND for common-mode ACP 2 filtering. Place a 0.1-µF ceramic capacitor from ACN to ACP to provide differential-mode filtering. High-side power MOSFET driver power supply. Connect a 0.047-µF capacitor from BTST to PHASE, and a bootstrap BTST 17 Schottky diode from REGN to BTST. Input of independent comparator. The comparator has one 50-k Ώ series resistor and one 2000-kΏ pulldown resistor. Program CMPIN voltage by connecting a resistor-divider from the IOUT pin to the CMPIN pin to the GND pin for adapter or charge current comparison or from the SRN pin to the CMPIN pin to the GND pin for battery voltage CMPIN 4 comparison. The internal reference is 0.6 V or 2.4 V, selectable by SMBus command ChargeOption(). When CMPIN is above the internal reference, CMPOUT goes HIGH. Place a resistor between CMPIN and CMPOUT to program hysteresis. Open-drain output of independent comparator. Place a 10-k Ω pullup resistor from CMPOUT to pullup supply rail. CMPOUT 3 Internal reference is 0.6 V or 2.4 V, selectable by SMBus command ChargeOption(). When CMPIN is above the internal reference, CMPOUT goes HIGH. Place a resistor between CMPIN and CMPOUT to program hysteresis. Copyright © 2010–2015, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: bq24707 bq24707A |
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Similar Description - BQ24707A_15 |
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