BQ294707DSGR

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Power Management Integrated Circuits (PMICs) are devices used to control, manage, and monitor the system power. PMICs can secure and manage the power levels of computer systems, network systems, server systems, and other large-scale systems.

Within the PMIC category, Battery Management (BM) products specialize in supplying and managing power on battery-enabled electronic products. BQ294707DSGR is an advanced high efficiency battery charger designed for the most demanding of portable applications. Commonly used in home electronic products and portable electronic products, BQ294707DSGR efficiently manages the power levels of battery-operated systems.

Application Field

This device is capable of detecting the voltage in a wide range of applications (2-6 cells) and charging Ni-MH, Ni-Cd, LiPo and Li-ion batteries with constant current/constant voltage accuracy. It can be used on a variety of charging occasions, such as mobile phones, digital cameras, tablets, MP3 and PDAs. Moreover, it can be used for energy storage and backup systems, such as UPS and emergency lighting.

Working Principle

When the device is enabled, a three-stage adjustment circuit is adopted to accurately control the battery voltage, current and temperature. By clamping internal signals, the device not only charges the battery, but also adjusts the voltage, current and temperature parameters. The charging process is divided into three stages. The first stage is preconditioning, which is used to soften and activate the battery before the charging process. The second stage is the CV stage, which provides the optimal voltage output during the charging process. The third stage is the CC stage, which is used to provide the optimal charging current output during the charging process.

During the charging process, the product\'s internal voltage reference provides the voltage necessary for accurate current control, and the device\'s internal temperature sensor can protect the battery from overcharge and overheat. BQ294707DSGR also has protective measures against overcurrent, short circuit and overcharge by setting the fluid charge in the internal control system.

The device also has plug detection and detection of non-permitted batteries. Plug detection can improve system performance, enhance safety, and reduce errors caused by incorrect connections. Through a parameter comparison between the pre-set code and the detected code, it can determine whether the connected battery is understood.

BQ294707DSGR efficiently reduces the power consumption of the system while providing precise power management and battery charging accuracy. This device is easy to use with a wide range of settings, including adjustable settings such as charging current, voltage and temperature, as well as active and sleep options.

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