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BQ24751RHDR Datasheet(PDF) 2 Page - Texas Instruments |
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BQ24751RHDR Datasheet(HTML) 2 Page - Texas Instruments |
2 / 39 page www.ti.com DESCRIPTION (CONTINUED) VREF RAC RSR (1) Pull-uprailcouldbeeitherVREForothersystemrail . (2) SRSET/ACSET couldcomefromeitherDACorresistordividers . Q2 (ACFET) SI4435 Q3(BATFET) SI4435 P P ACN ACP ACDRV ACDET ACGOOD SRSET ACSET VREF DAC CELLS CHGEN VDAC VADJ DAC ADC IADAPT HOST PVCC BATDRV HIDRV PH BTST REGN LODRV PGND SRP SRN P PACK+ PACK- SYSTEM ADAPTER+ ADAPTER- ACGOOD AGND bq24751 R1 R2 66.5 kW 10kW R4 C4 100pH C5 C8 Q4 FDS6680A Q5 FDS6680A C9 L1 D1 BAT54 1 F m C10 C4 BAT OVPSET LEARN ACOP Q1 (ACFET) SI4435 R3422kW C3 C2 0.1 F m 0.1 F m 0.010 W 1 F m C6 10 F m C7 10 F m 0.010 W C12 10 F m 0.1 F m C13 0.1 F m C11 10 F m 0.1 F m C15 0.1 F m C16 0.47 F m 1 F m 432k 1% W 8.2 H m PowerPad C19 10 F m C18 10 F m C17 10 F m R571kW R6100kW bq24751 SLUS734 – DECEMBER 2006 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. The bq24751 controls external switches to prevent battery discharge back to the input, connect the adapter to the system, and to connect the battery to the system using 6-V gate drives for better system efficiency. For maximum system safety, inrush-power limiting provides instantaneous response to high input voltage multiplied by current. This AC Over-Power protection (ACOP) feature limits the input-switch power to the programmed level on the ACOP pin, and latches off if the high-power condition persists to prevent overheating. The bq24751 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power. TYPICAL APPLICATION VIN = 20 V, VBAT = 3-cell Li-Ion, Icharge = 3 A, Iadapter_limit = 4 A Figure 1. Typical System Schematic, Voltage and Current Programmed by DAC 2 Submit Documentation Feedback |
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Similar Description - BQ24751RHDR |
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