MC33771BTB1AER2

Series:	Automotive, AEC-Q100
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Battery Cell Controller
Battery Chemistry:	Lithium-Ion
Number of Cells:	7 ~ 14
Fault Protection:	Over/Under Voltage
Interface:	SPI
Operating Temperature:	-40°C ~ 105°C (TA)
Package / Case:	64-LQFP
Supplier Device Package:	64-LQFP (10x10)

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Introduction

MC33771BTB1AER2 is a battery management integrated circuit (IC) or Power Management Integrated Circuit (PMIC) used in various electrical systems to regulate power and manage batteries. This PMIC is equipped with on-chip charging and monitoring of a single Li-ion/Li- polymer battery, integrated MOSFETs and advanced protection circuitry. It also features adjustable low voltage cutoff, adjustable fast-charge current, adjustable end-voltage, and charge status pins.

Application Field

This PMIC is widely used in the fields of consumer electronics, automation and industrial applications, automotive, medical and military.In consumer electronics, MC33771BTB1AER2 is used in a wide range of devices. It is used in chargers and battery packs for handheld devices such as cellphones, PDAs, mp3 players, digital cameras, and laptop computers. It is used in gaming consoles like the PlayStation and Xbox to provide efficient energy storage and management. It is also used in home appliances like air conditioners, electric fans, and vacuum cleaners.In industrial applications, this PMIC can be found in robots, industrial automation controllers, machine control systems, and digital signage displays. It is widely used in industrial environments, where reliable, efficient power is needed.In automotive industry, MC33771BTB1AER2 is used in the control units of passenger vehicles. It is used to regulate and manage the power for the system\'s brakes, steering, fuel injection, ignition, tire pressure monitoring, and airbags.In medical industry, this PMIC can be found in patient monitoring systems, physiotherapeutic devices, and precision instruments. It is used to power and monitor medical equipment and devices.Finally, this PMIC can be used in military applications. It is used in embedded systems, military aircrafts, and vehicles.

Working Principle

MC33771BTB1AER2 follows a three-mode charging algorithm with safety timers and fault detections. This PMIC integrates a buck converter, a boost converter, and a linear charger, allowing the IC to adapt to various charging scenarios.The buck converter can be used for fast-charging. When the power to the battery is lower than its over-voltage threshold, the buck converter is turned on and the current from the power source is transferred to the battery. This will charge the battery at a fast rate, until it reaches the optimal voltage level, then the PMIC enters the constant voltage phase (CV-phase).The boost converter is used to regulate the output of the power source. During the CV-phase, the boost converter is used to provide a constant voltage to the battery so that charging is maintained at the optimal voltage level. The PMIC monitors the battery with a battery sense terminal and a resistor divider.The linear charger is used during the trickle phase (TP-phase). This phase provides a low current to the battery to finish off charging without any thermal or overcharging risks.The MC33771BTB1AER2 also has a number of safety features to protect the battery and device. This includes undervoltage, over-voltage, cycle end, temperature monitoring, over-current and short-circuit protections.

Conclusion

MC33771BTB1AER2 is a powerful PMIC used in a variety of application fields. This PMIC is equipped with a three-mode charging algorithm, and numerous safety features to ensure efficient and reliable power management of a single Li-ion/Li- polymer battery. This PMIC has a wide range on applications in consumer electronics, automotive, medical and military applications, as well as industrial automation and robotics. It is designed to be user-friendly, so designers and developers can easily integrate this IC into their systems with just minimal programming and calibration. With its powerful features and reliable performance, the MC33771BTB1AER2 will continue to be a popular choice as a battery management integrated circuit.

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