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BQ24703PW

Host-Controlled Multi-Chemistry Battery Charger with system power selector

Manufacturer: Texas Instruments, Inc
Mfr.Part #: BQ24703PW
Datasheet: BQ24703PW Datasheet (PDF)
Package/Case: TSSOP
Product Type: Power Management ICs
RoHS:
Lifecycle: Active

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BQ24703PW General Description

The bq24702/bq24703 is a highly integrated battery charge controller and selector tailored for notebook and sub-notebook PC applications.

The bq24702/bq24703 uses dynamic power management (DPM) to minimize battery charge time by maximizing use of available wall-adapter power. This is achieved by dynamically adjusting the battery charge current based on the total system (adapter) current.

The bq24702/bq24703 uses a fixed frequency, pulse width modulator (PWM) to accurately control battery charge current and voltage. Charge current limits can be programmed from a keyboard controller DAC or by external resistor dividers from the precision 5-V, ±0.6%, externally bypassed voltage reference (VREF), supplied by the bq24702/bq24703.

The battery voltage limit can be programmed by using the internal 1.196-V, ±0.5% precision reference, making it suitable for the critical charging demands of lithium-ion cells. Also, the bq24702/bq24703 provides an option to override the precision reference and drive the error amplifier either directly from an external reference or from a resistor divider off the 5 V supplied by the integrated circuit.

The selector function allows the manual selection of the system power source, battery or wall-adapter power. The bq24702/bq24703 supports battery-conditioning and battery-learn cycles through the ACSEL function. The ACSEL function allows manual selection of the battery or wall power as the main system power. It also provides autonomous switching to the remaining source (battery or ac power) should the selected system power source terminate (refer to Available Options table for the differences between the bq24702 and the bq24703). The bq24702/bq24703 also provides an alarm function to indicate a depleted battery condition.

The bq24702/bq24703 PWM controller is ideally suited for operation in a buck converter for applications when the wall-adapter voltage is greater than the battery voltage.

Key Features

Dynamic Power Management, DPM Minimizes Battery Charge Time
Integrated Selector Supports Battery Conditioning and Smart Battery Learn Cycle
Zero Volt Operation
Selector Feedback Circuit Ensures Break-Before-Make Transition
±0.4% Charge Voltage Accuracy, Suitable for Charging Li-Ion Cells
±4% Charge Current Accuracy
300-kHz Integrated PWM Controller for High-Efficiency Buck Regulation
Depleted Battery Detection and Indication to Protect Battery From Over Discharge
20-µA Sleep Mode Current for Low Battery Drain
24-Pin TSSOP Package and 5 mm × 5 mm QFN package (bq24703 only)

Specifications

Number of series cells	2, 3, 4	Charge current (max) (A)	10
Vin (max) (V)	28	Cell chemistry	Li-Ion/Li-Polymer
Battery charge voltage (min) (V)	8.4	Battery charge voltage (max) (V)	16.8
Absolute max Vin (max) (V)	30	Control topology	Switch-Mode Buck
Control interface	Standalone (RC-Settable)	Features	Power Path
Vin (min) (V)	7	Rating	Catalog
Operating temperature range (°C)	-40 to 125, -40 to 85	feature-type	Switching Battery Charger Controller
feature-battery-type	Li-Ion\|Li-Pol	feature-process-technology
feature-maximum-supply-current-ma	6	feature-minimum-operating-supply-voltage-v	4.5
feature-maximum-operating-supply-voltage-v	28	feature-output-voltage-v	8.4 to 16.8
feature-output-current-ma	10000(Max)	feature-maximum-power-dissipation-mw
feature-packaging	Tube	feature-rad-hard
feature-pin-count	24	feature-supplier-package	TSSOP
feature-standard-package-name	SOP	feature-cecc-qualified	No
feature-esd-protection		feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-eccn-code	EAR99	feature-svhc	Yes
feature-svhc-exceeds-threshold	No

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Ratings and Reviews

D**o 03/27/2024

All excellent seller thank you very much

C**b 09/13/2021

Fast delivery, good packaging, indicator in scratches, how to work and review see on youtube channel radioremontu

C**b 04/02/2020

Tashkent reached 42 days. The number of chokes and denominations match. Good seller. I recommend.

C**a 02/10/2020

The parcel reached in 45 days, the attachment corresponds to the description, the purchase is satisfied. It hurt for a short time the parcel was looking for me.