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BQ24750TIN/a3avaiMulti-Cell Synchronous Switch-mode Charger with System Power Selector 28-VQFN -40 to 125
BQ24750RHDRTIN/a1301avaiMulti-Cell Synchronous Switch-mode Charger with System Power Selector 28-VQFN -40 to 125


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BQ24750-BQ24750RHDR
Multi-Cell Synchronous Switch-mode Charger with System Power Selector 28-VQFN -40 to 125
bq24750 www.ti.com............................................................................................................................................... SLUS735D–DECEMBER 2006–REVISED MARCH 2009 Host-Controlled Multi-Chemistry Battery Charger With Integrated System Power Selector and AC Overpower Protection 1 FEATURES • 10-μA Off-State Current • NMOS-NMOS Synchronous Buck Converter • 28-pin, 5x5-mm QFN package with 300 kHz Frequency and >95% Efficiency APPLICATIONS • 30-ns Minimum Driver Dead-time and 99.5% • Notebook and Ultra-Mobile Computers Maximum Effective Duty Cycle • Portable Data-Capture Terminals • High-Accuracy Voltage and Current Regulation • Portable Printers – ±0.5% Charge Voltage Accuracy • Medical Diagnostics Equipment – ±3% Charge Current Accuracy • Battery Bay Chargers – ±3% Adapter Current Accuracy • Battery Back-up Systems – ±2% Input Current Sense Amp Accuracy • Integration DESCRIPTION – Automatic System Power Selection From The bq24750 is a high-efficiency, synchronous AC/DC Adapter or Battery battery charger with integrated compensation and – Internal Loop Compensation system power selector logic, offering low component count for space-constrained multi-chemistry battery – Internal Soft Start charging applications. Ratiometric charge current and • Safety voltage programming allows high regulation – Input Overvoltage Protection (OVP) accuracies, and can be either hardwired with resistors or programmed by the system power-management – Dynamic Power Management (DPM) with microcontroller using a DAC or GPIOs. Status Indicator – Programmable Inrush Adapter Power (ACOP) and Overcurrent (ACOC) Limits – Reverse-Conduction Protection Input FET – Battery Thermistor Sense Input (TS) for 28 27 26 25 24 23 22 Charge Qualification CHGEN 1 21 DPMDET • Supports Two, Three, or Four Li+ Cells ACN 2 20 CELLS • 5–24 V AC/DC-Adapter Operating Range 3 bq24750 19 SRP ACP • Analog Inputs with Ratiometric Programming 28 LD QFN ACDRV 4 18 SRN via Resistors or DAC/GPIO Host Control TOP VIEW BAT ACDET 5 17 – Charge Voltage (4–4.512 V/cell) ACSET 6 16 SRSET – Charge Current (up to 10 A, with 10-mΩ Sense Resistor) IADAPT ACOP 7 15 – Adapter Current Limit (DPM) 8 9 10 11 12 13 14 • Status and Monitoring Outputs – AC/DC Adapter Present with Programmable Voltage Threshold – DPM Loop Active – Current Drawn from Input Source • Supports Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc. • Charge Enable 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2009, Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. TS PVCC AGND BTST VREF HIDRV VDAC PH VADJ REGN ACGOOD LODRV BATDRV PGND
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