BQ25601RTWT

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	--
Fault Protection:	Over Temperature, Over Voltage
Charge Current - Max:	3A
Battery Pack Voltage:	4.2V
Voltage - Supply (Max):	13.5V
Interface:	I²C
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	24-WFQFN Exposed Pad
Supplier Device Package:	24-WQFN (4x4)

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Introduction

PMIC - Battery Chargers play a critical role in many applications, from providing a reliable source of power to a range of devices to managing the life cycle of a battery-powered system. The BQ25601RTWT is a single-cell linear lithium-ion battery charger that is optimized for space-constrained, cost-sensitive applications.

Overview

The BQ25601RTWT is a highly-integrated lithium-ion battery charger that is designed to simplify the task of charger design. It utilizes switch-mode power topology to provide high efficiency charging over the full input voltage range - from 4.3V to 40V. It supports charge currents up to 2A and combines a linear charger, pre-charge control and safety features in a single device. The BQ25601RTWT provides excellent regulation accuracy and a range of self-protection features.

Application

The BQ25601RTWT is a versatile device and can be used in a wide range of applications requiring a single-cell linear battery charger. It is suitable for a variety of portable and embedded applications, including smartphones, tablets, laptops, handheld devices and medical instruments. Additionally, it can be used to design a cost-effective, space-saving and reliable system for battery-powered applications.

Features and Benefits

The BQ25601RTWT includes a range of features and benefits that make it an ideal choice for many applications:• Output current up to 2A• Input voltage range from 4.3V to 40V• High accuracy regulation• Thermal protection• Low quiescent current• Cycle charging and pre-charge• Built-in high frequency switching power stage• Fully protected against short circuit, over current, and over temperature• OVP and current foldback• Low external component count

Working Principle

The BQ25601RTWT utilizes a buck-boost charge controller IC and a high frequency, synchronous switch-mode power stage. The controller IC monitors an integrated current sense resistor to measure the current flow into the battery. When the voltage on the battery reaches the programmed regulation voltage level, the controller reduces the charging current to maintain regulation accuracy.The integrated switching power stage is optimized for space and cost efficient designs. The power stage drives the external pass transistor to regulate the charging current. The switching frequency is controlled by an internal oscillator, and the duty cycle is adjusted to regulate the output current as specified.

Conclusion

The BQ25601RTWT is an excellent choice for a wide range of battery-powered applications and is optimized for cost, space and reliability. It provides a wide input voltage range, high efficiency regulation and features a range of safety and protection features. Additionally, it is highly integrated and requires minimal external components. With its many features and benefits, the BQ25601RTWT can be used in a wide range of applications requiring reliable and efficient lithium-ion battery charging.

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