Switch Mode Charger Li-Ion/Li-Pol/NiMH/NiCD Packs 16000mA 9V to 19.2V 32-Pin VQFN EP T/R, BQ24721CRHBT, Texas Instruments

The bq24721 is a high efficiency synchronous battery pack charger with high level of integration for portable applications. This device implements a high performance analog front-end thatinterfaces to the system power management micro-controller through a simplified SBS-like SMBus interface. The dynamic power management (DPM) function modifies the charge current depending on system load conditions, avoiding ac adapter overload. High accuracycurrent sense amplifiers enable accurate measurement of either the charge current or the ac adapter current, allowing termination of nonsmart packs and monitoring of overall system power. The adapter isolation diode can be bypassed or entirely replaced with an external MOSFET using a control signal provided by the bq24721, thus reducing overall power dissipation. Integrated features such as charger soft start, charge overcurrent protection, and IC temperature monitoring provide a second level of protection, in addition to pack and system protection functions.

High Efficiency NMOS-NMOS Synchronous Buck Converter With User-Selectable 300 kHz or 500 kHz frequency

bq24721C Offers Softer Turn-On, Stronger Turn-Off

SBS-Like⁽¹⁾ SMBus Interface for Control and Status Communications With Host

Programmable Battery Voltage, Charge Current, and AC Adapter Current via SBS-Like SMBus Interface

0.4% Charge Voltage Regulation Accuracy

3% Charge Current Regulation Accuracy

3% Adapter Current Regulation Accuracy Dynamic Power Management (DPM)

2% Accuracy Integrated Charge and AC Adapter 20× Current Amplifier Output

3-Cell and 4-Cell Li-Ion Voltage Regulation 9 V, 12 V-14.4 V, 16 V-19.2 V

Battery Pack Voltage Operating Range 0 V-19.2 V

AC Adapter Operating Range 8 V-28 V

99.5% Max Duty Cycle

Internal Soft Start

Integrated 5% 5-V LDO When AC Adapter Applied

6-V Drive Supply Voltage for Increased Efficiency

Reverse Battery to Adapter Discharge Protection

Battery/Adapter to System Power Selector Function

Charge and Adapter Overcurrent Protection

Battery Thermistor Sense, TS, Comparators

Available in 32-Pin 5×5-mm QFN Package

APPLICATIONS

Portable Notebook Computers
Portable DVD Players
Webpads, PC Tablets

Характеристики

Battery_type	Li-Ion, Li-Pol, NiCD Packs, NiMH
Operating_temperature	-40 to 85 °C
Specifications	http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=BQ24721C&&fileType=pdf
Schedule_b	8542390000
Product_dimensions	5 x 5 x 0.9 mm
Pin_count	32
Output_voltage	9 to 19.2 V
Output_current	16 A
Supplier_package	VQFN EP
Msl_level	2
Бренд	Texas Instruments
Mounting	Surface Mount
Max_processing_temp	260
Lead_finish	Gold
Kind	Switch Mode Charger
Htsn	8542390001
Eccn	EAR99
Country_of_origin	United States

SKU: BQ24721CRHBT

Description