MAX6423US20+T

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Introduction to MAX6423US20+T

The MAX6423US20+T is a power management integrated circuit (PMIC) - Supervisors. It is designed to monitor and protect a wide range of multi-cell embedded Li-ion, Li-polymer, and NiCd/NiMH batteries. It also provides a wide range of charge control and monitoring for battery charging applications. The MAX6423US20+T fully integrates regulators and linear supervisor circuits, offering unprecedented flexibility, scalability and easy integration.

Application Fields

The MAX6423US20+T is widely applied in a variety of consumer, industrial and automotive applications, such as power supplies and DC-DC converters, automotive systems, medical devices, gaming consoles, consumer and communication devices. Here are some of the features of this Power Management IC:

• Wide input voltage range (3V to 15V)
• Provides accurate voltage monitoring to detect under/over voltage conditions
• Charge control with manual resume feature
• Full protection against reverse battery and transient voltage
• Automatic charging current Control up to 2A
• Thermal shutdown protection
• Current limit protection
• Support for active and passive cell balancing

Working Principle

The MAX6423US20+T provides several voltages for safe and efficient charge control, active and passive cell balancing, voltage monitoring, and shutdown protection. The internal circuits only require two external components, which minimizes board space and cost. This maximizes reliability and reduces energy loss.

The MAX6423US20+T contains a power supply voltage regulator that converts the input voltage (3V to 15V) to the regulated output voltages needed by the circuits, such as VCC, VCH and VEC. The voltage regulator is designed to provide accurate voltage regulation and improved power efficiency.

The MAX6423US20+T also contains linear supervisors to monitor the voltages, such as the battery voltage and system supplies voltages. The linear supervisors detect the overvoltage and undervoltage conditions, and then activate the output signals in order to shut down the system. The MAX6423US20+T also features current limiting and thermal protection functions.

The MAX6423US20+T also contains cells balancing circuits which use the active and passive balance techniques, so that all cells operate in the same voltage range. The active balance technique provides a fast, accurate and reliable cell balancing, while the passive balance technique allows for a lower total system cost, but slower cell balancing.

The MAX6423US20+T also includes the charge control circuit that eliminates the need for additional microcontroller (MCU) to control the battery charging process. It provides manual resume feature that allows the user to resume the charging process manually. It also includes the protection circuit that protects against reverse battery and transient voltage.

Conclusion

In conclusion, the MAX6423US20+T is an advanced and easy to use PMIC – Supervisors designed to monitor and protect a wide range of multi-cell embedded Li-ion, Li-polymer, and NiCd/NiMH batteries. It features a wide input voltage range, accurate voltage monitoring, charge control with manual resume feature, full protection against reverse battery and transient voltage, automatic charging current control up to 2A, thermal shutdown protection, current limit protection and support for active and passive cell balancing.

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