BD4947G-TR Integrated Circuits (ICs)

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PMIC (Power Management IC) devices are a type of integrated circuit (IC) that manages power supply in electronic devices. PMICs can control the amount of electricity provided to a device and distribute power between different components of the device. PMICs also manage thermal management, voltage regulation, and battery management. One such PMIC device is the BD4947G-TR from ROHM Semiconductor. This is a low-voltage supervisor IC designed for use in automotive and industrial applications. In this article, we will look at the application field and working principle of the BD4947G-TR.

The BD4947G-TR is designed for use in a wide range of applications such as automotive, telematics, consumer electronics, and industrial control. It is used in power distribution systems, power supply systems, and motor systems, where it provides protection against overvoltage, undervoltage, and interrupts of power. It is built on an advanced submicron CMOS process and fully integrated with an Enhanced Latch-Up immunity of 5V on the power supply. It is an ultra-low-power IC, meaning it consumes very little power, which makes it suitable for a wide range of applications.

The BD4947G-TR features two active-low output pins, OUT1 (active-low RESET) and OUT2 (active-low ERROR). Both outputs can be used to indicate power anomalies or over current events. OUT1 is typically used for resetting a system controller or processor and can be connected to the RESET pin of the system. If a power anomaly or over current event is detected, OUT1 will switch to a low level and the system will automatically be reset. OUT2 is usually connected to the ERROR pin of the system, and is active only when an over current is detected. It will switch to a low level for a preset time period and switch back to high level once the over current event has been cleared. The time period for the ERROR signal can be adjusted through external resistors or capacitor.

The basic operating principle of the BD4947G-TR device is to regulate the voltage and current on the power supply lines. It continuously monitors the power supply voltage and will send out a RESET if it falls below the preset thresholds. The device also features an Over Current Detector (OCD) which will send out an ERROR signal when an over current is detected. It can be used to protect the system against over current situations and prevent possible system damage.

The BD4947G-TR is an easy to use and useful IC for a wide range of automotive and industrial applications. It features an ultra-low-power design and a range of protection features, making it suitable for a number of power supply applications. The device can provide protection against overvoltage, undervoltage, and interrupt of power, protecting the system from various power supply anomalies and over current events. With its integrated Latch-Up immunity and active-low outputs, the BD4947G-TR can be easily integrated into any system to provide a reliable power supply system.

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