BD48L49G-TL Integrated Circuits (ICs)

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Power management integrated circuits (PMICs) are integrated circuits that provide power management for almost any application field.PMICs typically include multiple voltage regulators, battery management circuits, current monitors and temperature sensors all in a single chip. One type of PMIC is a supervisor circuit, which performs multiple tasks to ensure the stability, reliability and safety of the system.

The BD48L49G-TL is a supervisor circuit from ROHM that provides over voltage protection, current limiting and over temperature protection. This device is suitable for applications such as AC/DC converters, DC/DC converters, RTCs (real-time clocks) and motor controls. In this article, we will discuss the application field and working principle of the BD48L49G-TL.

Application Field

The BD48L49G-TL is designed for use in electronic systems that require reliable over voltage/current/temperature protection. It has specific applications in AC/DC, DC/DC and LED lighting power supplies, motor control systems, RTCs and computer peripherals. The BD48L49G-TL supports a wide operating temperature range of -40℃ to +125℃, making it suitable for outdoor and automotive applications.

Working Principle

The BD48L49G-TL is a voltage monitoring IC incorporating both over voltage and over current protection. It has built-in 3V-50V voltage detection circuits, that can be externally configured, to switch an external transistor which interrupts the power supply. The chip also includes an over temperature protection circuit that shuts down the power supply if the temperature exceeds a predetermined value, preventing possible damage to the system.

The BD48L49G-TL also contains an internal delay circuit which is used to dramatically reduce the overall system power consumption. This feature is especially useful for battery powered systems as it reduces the power draw while the chip is in standby mode. The BD48L49G-TL also contains a built-in clock circuit which is used to accurately measure the elapsed time while the delay circuit is active and to then activate the power switch, when the required timing delay has expired.

Conclusion

The BD48L49G-TL is a versatile power supervisor circuit designed for use in a variety of industrialized and embedded applications. It provides reliable over voltage, over current and over temperature protection and incorporates an internal clock for precise timing control. The BD48L49G-TL is suitable for a wide temperature range, making it an ideal choice for both indoors and outdoors application fields.

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