BQ2057PDGKRG4

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	Current
Fault Protection:	--
Charge Current - Max:	--
Battery Pack Voltage:	4.1V
Voltage - Supply (Max):	15V
Interface:	--
Operating Temperature:	-20°C ~ 70°C (TA)
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package:	8-VSSOP
Base Part Number:	BQ2057

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Introduction

PMIC (Power Management IC) refers to a kind of multi-function integrated circuit (integrated circuit) which generally integrates complete power management functions, including A/V switching, motors, digital circuits, etc. It is particularly important in power electronics and digital circuits as it is capable of regulating, monitoring, and controlling the power that is distributed throughout a system. Within the context of PMIc, battery charging is a critical function of any system and can be closely linked to the larger nature of PMIC. The following consideration of the BQ2057PDGKRG4 PMIC battery charger will examine its application fields and working principles.

Application Fields

The BQ2057PDGKRG4 PMIC is an embedded reverse current battery charger, capable of operating from both a linear and a switch-mode power supply. This adaptability makes the BQ2057PDGKRG4 viable for a vast range of applications, such as medical equipment, automotive systems, industrial control systems, and so on. It features a wide input voltage range (4.5V to 20V), allowing it to be driven from an almost universal power supply. In addition, its battery voltage range of 4.2V to 37V provides maximum flexibility to meet the demanding requirements of industrial and automotive applications. In addition, the embedded reverse current battery charger of the BQ2057PDGKRG4 helps in extending the life of the chargeable device, as it is designed with a number of safety features, including temperature and time-based charging, self-adjustable charge current, and active current sensing. Furthermore, the charger itself features a highly accurate current sensor for precision current monitoring and control.

Working Principles

At the core of this PMIC is its primary active device, the battery charger circuit. This circuit comprises of the following components: power supply, linear battery charger IC, switch-mode charger IC, pass transistor, and current sense resistor. The power supply provides a constant supply of energy to the charger IC, which in turn converts this energy into the appropriate voltage and current suitable for the attached battery. The pass transistor is responsible for providing the necessary current and voltage to the load as well as enabling the charge/discharge control of the battery. Finally, the current sense resistor monitors the current flowing in and out of the battery, ensuring proper charge and discharge when required.The monitor system in the BQ2057PDGKRG4 battery charger is also an important part in its functionality. The monitor system ensures the battery is charged and discharged efficiently and safely, and includes a voltage monitor, temperature monitor, overcurrent protection, and overcharge protection. The voltage monitor and temperature monitor are responsible for tracking the battery’s voltage and temperature, respectively, to ensure proper charge and discharge. The overcurrent and overcharge protection are in place to prevent any risk of damaging either the battery or the charger due to excessive current or voltage.

Conclusion

The BQ2057PDGKRG4 PMIC battery charger is a robust and efficient system and is designed for a variety of different applications. Its ability to work with both linear and switch-mode power supplies, as well as its wide range of input and output voltage, means it can be used in a diverse range of systems. The embedded battery charger circuit and its associated monitor system ensures the BQ2057PDGKRG4 is one of the most reliable battery chargers on the market, capable of providing safe and efficient charging and discharging of batteries of all types.

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