MAX16922ATPJ/V+T

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Power management integrated circuits (PMICs) are a type of integrated circuit specifically designed to provide power regulation and management functions. PMICs are commonly used in core components of electrical and electronic products such as laptop computers, smartphones and other mobile devices, as they allow a system to optimize the delivery and use of power. Within the PMICs family, specialized components are available such as MAX16922ATPJ/V+T. This IC encompasses several functionalities performing over-voltage and over-current protection, as well as battery charging in automotive and transportation applications. This article will focus on discussing this specialized IC’s application field, as well as the working principles behind it.

Application Field

MAX16922ATP from Maxim Integrated is a general-purpose battery charger specifically designed for automotive (A) and transportation (T) applications. It is one of the few devices that can support both hybrid vehicles and electric vehicles. This IC provides excellent capabilities with its wide operating temperature range (from -40°C to 125°C). The device is capable of accepting both current and voltage inputs, with a maximum operating voltage of 16V. MAX16922ATP also offers termination modes for charge termination (V+T) and safety modes such as Over Voltage Protection (OVP), Under Voltage Protection (UVP), Overcurrent Protection (OCP), and battery temperature protection (DTS). The device can also be calibrated for non-standard battery sizes and types.

Apart from the features listed above, the IC includes additional features to increase the system’s overall efficiency. These features are low quiescent current, ultra-low shutdown current, wide input voltage operating range, and an integrated equalizer for cell balancing. This feature is especially important on battery packs with more than one cell, as it ensures that all the cells receive a balanced charge.

Working Principle

The MAX16922ATP works on the principle of Charge-Pump Power Management. Charge-pumps are a type of DC-DC (direct current to direct current) converter with two outputs of higher voltage than their input. They are simple and efficient voltage converters and regulators, widely used in the industry. The MAX16922ATP works by managing the current and voltage between the terminals depending on the input and determined by the user.

The IC features two modes of operation: Negative-Controlled Mode and Positive-Controlled Mode. In the Negative-Controlled Mode, the IC will systematically reduce the amount of current applied to the load, adjusting the applied voltage in a way that maintains the load under the pre-determined voltage. In the Positive-Controlled Mode, the IC will adjust the applied voltage in a way that the load receives a current higher than the predetermined one.

The MAX16922ATP includes several other features such as over-voltage protection. This feature prevents exceeding the threshold voltage and damaging the system. The IC also includes an internal battery temperature sensing line that helps prevent excessive power input to the battery, avoiding damages caused by thermal runaways. The device also offers a fast-mode switching capability, allowing higher power levels as well as increased efficiency.

Conclusion

MAX16922ATPJ/V+T is an integrated circuit specially designed for automotive and transportation applications. It provides several features such as current and voltage input operations, fast mode switching, and over-voltage and over-current protection. The working principle of the device is based on charge-pump power management, where the amount of current applied to the load is adjustable depending on the input and predetermined settings. This IC is meant to protect the load from damages due to excessive power inputs, as well as providing an efficient and fast way of charging and maintaining the battery’s charge.

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