(Hong Kong)
Product Summary
The BQ24745RHDR is a high-efficiency, synchronous battery charger. The BQ24745RHDR has an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. SMBus input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus. The applications of the BQ24745RHDR include Notebook and Ultra-Mobile Computers, Portable Data-Capture Terminals, Portable Printers, Medical Diagnostics Equipment, Battery Bay Chargers, Battery Back-up Systems.
Parametrics
BQ24745RHDR absolute maximum ratings: (1)DCIN, CSOP, CSON, CSSP, CSSN, VFB:–0.3V to 30V; (2)PHASE: –1V to 30V; (3)EAI, EAO, FBO, VDDP, LGATE, ACIN, VICM, ICOUT, ICREF, CE, ACOK: –0.3V to 7V; (4)VDDSMB: –0.3V to 7V; (5)VREF:–0.3V to 3.6V; (6)BOOT, UGATE with respect to GND and PGND:–0.3V to 36V; (7)GND, PGND: –1V to 1V; (8)Maximum difference voltage: CSOP–CSON, CSSP–CSSN:–0.5 to 0.5V; (9)Junction temperature range:–40℃ to 155℃; (10)Storage temperature range:–55℃ to 155℃.
Features
BQ24745RHDR features: (1)NMOS-NMOS Synchronous Buck Converter with 300 kHz Frequency and ＞95% Efficiency; (2)30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle; (3)High-Accuracy Voltage and Current Regulation; (4)Integration; (5)Safety; (6)Up to 19.2 V Battery Voltage; (7)6 V–24 V AC/DC-Adapter Operating Range; (8)Simplified SMBus Control; (9)Status and Monitoring Outputs; (10)Charge Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.; (11)Cells Pin Supports Two to Four Li-Ion Cells; (12)Charge Enable Pin; (13)＜10-mBattery Current with Adapter Removed; (14)＜1mA Input DCIN Current with Adapter Present and Charge Disabled; (15)28-pin, 5x5 mm2 QFN Package.
Diagrams
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 BQ24745RHDR |
Texas Instruments |
Battery Management SMBus-Cntrld Lev 2 Multi-Chem Batt Chrg |
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BQ24745RHDRG4 |
Texas Instruments |
Battery Management Sw mode charger |
Data Sheet |
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