Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Battery Chemistry:	Multi-Chemistry
Number of Cells:	2 ~ 4
Current - Charging:	Constant - Programmable
Programmable Features:	--
Fault Protection:	Over Current, Over Voltage
Charge Current - Max:	10A
Battery Pack Voltage:	18.048V (Max)
Voltage - Supply (Max):	24V
Interface:	--
Operating Temperature:	-40°C ~ 125°C (TJ)
Package / Case:	28-VFQFN Exposed Pad
Supplier Device Package:	28-VQFN (5x5)
Base Part Number:	BQ24750

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Introduction

Battery chargers are essential electronic components that are used to recharge batteries. They are essential parts of any device that is powered by a rechargeable battery, such as a laptop, mobile phone, or tablet. The BQ24750ARHDR is an integrated single-cell Power Management IC (PMIC) with a built-in battery charger and power path Manager.

Product Overview

The BQ24750ARHDR is an integrated single-cell power management IC (PMIC) with a built-in battery charger. It combines a highly-efficient synchronous buck converter, a reverse-blocking FET, an advanced current limited power conversion module (PWM) charger, and an adjustable current limit controller, allowing it to provide a maximum input current of 3.2A. The BQ24750ARHDR also features PowerPath functionality, allowing it to simultaneously charge the battery and supply sufficient power to the system. It is also designed to protect against short circuits and over-temperature conditions.

Application Field

The BQ2475AREDAR is suitable for applications that require efficient and reliable charging of single-cell Li-ion batteries. It is suitable for use in portable devices such as cell phones, PDAs, portable media players, and tablets. The BQ2475ARHDR is optimized for high-current operation and is designed to provide up to 3.2A of charging current to the system at an input voltage range of 4.5V to 16V.

Working Principle

The BQ2475ARHDR is an integrated single-cell power management IC that combines a highly-efficient synchronous buck converter, a reverse-blocking FET, an advanced current limited power conversion module (PWM) charger, and an adjustable current limit controller, allowing it to provide a maximum input current of 3.2A (with an input voltage range of 4.5V to 16V). The BQ2475ARHDR utilizes a buck-type switching regulator for highly efficient power conversion, thereby providing an output voltage that is lower than the input voltage. The buck-type switching regulator provides both step-up and step-down capabilities, enabling the BQ2475ARHDR to provide charging current to the battery, even when the input voltage is lower than the battery voltage. The PWM current limited power conversion module, which is designed to provide protection against short circuits and over-temperature conditions, monitors the output voltage and adjusts the current limiting threshold accordingly. The adjustable current controllers complement the PWM current limited power conversion module by providing the necessary current regulation for optimal battery charging, while also serving to maximize efficiency. The reverse-blocking FET helps to protect the system by limiting the reverse current flow if the ESD/reverse-charging protection diode fails. The BQ2475ARHDR also features PowerPath functionality, allowing it to simultaneously charge the battery and supply sufficient power to the system. By using PowerPath, the BQ2475ARHDR is able to direct surplus current to the system, resulting in improved charging times and higher peak system power levels. Additionally, the PowerPath feature helps to minimize power dissipation, improve system reliability and reduce component costs.

Conclusion

The BQ2475ARHDR is an integrated single-cell PMIC with a built-in battery charger and power path Manager that is optimized for high-current operation. It is suitable for applications that require efficient and reliable charging of single-cell Li-ion batteries, such as cell phones, PDAs, portable media players, and tablets. By combining a highly-efficient synchronous buck converter, a reverse-blocking FET, an advanced current limited power conversion module, and an adjustable current limit controller, the BQ2475ARHDR is able to provide a maximum input current of 3.2A, while at the same time providing PowerPath functionality, which allows it to simultaneously charge the battery and supply sufficient power to the system.

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