BD4824G-TR Integrated Circuits (ICs)

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When making embedded designs, it’s important to ensure that the system functions properly and safely even when adverse conditions arise, such as over and under voltages, unexpected reset events, and more. To achieve this level of protection, many microcontroller and microprocessor-based systems rely on power management ICs (PMICs) as well as supervisors and brown out detectors, such as the BD4824G-TR.

The BD4824G-TR is an on-chip voltage supervisor designed for microprocessor and microcontroller-based systems. It offers a wide variety of protection features, such as overvoltage protection (OVP), undervoltage protection (UVP), brownout detection (BOD), and reset output (RESET).

Application Fields

The BD4824G-TR is ideal for use in systems that need voltage monitoring and resetting capabilities, such as computers and computer peripherals, consumer electronics, automotive systems, and industrial and medical systems. For example, in consumer electronic devices such as digital cameras, the BD4824G-TR can be used to detect voltage fluctuations and automatically shut down the system if necessary. It can also be used in automotive applications, such as engine control systems, where it can detect when the engine is running outside of its normal parameters and automatically shut down the system in order to prevent damage.

The BD4824G-TR can also be used in industrial systems, as it is designed for 24V input and output for industrial applications, such as programmable logic controllers and motor control systems. In medical systems, the BD4824G-TR can be used to detect voltage fluctuations in critical medical device systems and respond accordingly in order to ensure patient safety.

Working Principle

The BD4824G-TR is an integrated voltage supervisor that includes an on-chip voltage detector, an error amplifier, and a reset flip-flop. The BD4824G-TR is designed with two operating modes: buildup mode and hysteresis mode. In buildup mode, the voltage is monitored for over and undervoltage conditions. If the input voltage exceeds the upper threshold (OVP threshold) level, the OVP output is asserted. If the input voltage drops below the lower threshold (UVP threshold) level, the UVP output is asserted.

In hysteresis mode, there is a window between the upper and lower thresholds (BOD threshold) and if the input voltage enters this window the BOD output is asserted. This window size can be adjusted using a single external capacitor. The output flip-flop is used to ensure that a reset signal is generated when either the OVP, UVP or BOD signals are asserted. Furthermore, the reset signal is able to generate an active low pulse reset in order to provide proper reset synchronization.

The BD4824G-TR also includes a power-on reset (POR) circuit which ensures that the reset signal is asserted during power-on and held until the power supply reaches its normal operating voltage. In addition, the reset signal is able to disregards short duration glitch provided forward and backward spikes are not present at the same time.

The BD4824G-TR is designed to operate over a temperature range of -40°C to +85°C and is available in a space-saving 8-pin SOP package. It is also RoHS and Halogen-free, making it especially suitable for applications with stringent environmental requirements.

Conclusion

The BD4824G-TR is an ideal solution for systems that require voltage monitoring and resetting capabilities. It offers wide range of protection features, such as overvoltage protection, undervoltage protection, brownout detection and reset output, making it suitable for use in a variety of applications, such as computers and computer peripherals, consumer electronics, automotive systems, industrial and medical systems. The BD4824G-TR is designed to operate over a temperature range of -40°C to +85°C, and is available in a space-saving 8-pin SOP package.

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