BD4945G-TR Integrated Circuits (ICs)

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PMIC supervisors are designed to monitor power supplies within circuits to ensure the operation, safety, and longevity of circuits. An example of a PMIC supervisor, the BD4945G-TR, is a power supply monitor that provides protection for circuits from over-voltage and over-current. It also monitors the voltage on electronic components, providing additional protection from temperature overloads.

The BD4945G-TR is a circuit supervisor IC that contains Power-On Reset (POR), Power-Down Reset (PDR), and Power-Off Reset (PFR). The POR circuit keeps the system stable during the power on sequence, the PDR circuit protects the system from damage when the power supply drops below the specified value, and the PFR circuit prevents leakage current when the VCC power supply is off.

The application field of the BD4945G-TR covers multiple markets such as consumer products, appliance and industrial machinery. For instance, in consumer products, it is used to protect devices such as smartphones, digital cameras, tablets, and printers from voltage and current fluctuations. In appliances, the IC is used to monitor the AC power supply to ensure that the appliance does not overload or draw too much current, preventing potentially dangerous electrical fires. In industrial machinery, the IC can help protect controllers, motors, solenoids, and other components from excessive current and temperature.

The working principle of the BD4945G-TR is to monitor the power supply using its three working modes, level detection, voltage detection, and current detection. Level detection monitors power supply voltage levels such as low or high, while voltage detection monitors the voltage of the power supply after it has been filtered and stabilized. Current detection, which is the third mode, monitors the AC current a circuit is drawing and provides over-current protection.

The BD4945G-TR\'s level detection and voltage detection work together to ensure the system\'s safe operation, while the current detection monitors the current consumption of the circuits and provides over-current protection. The detector adjusts the current consumption to safe levels when the consumption exceeds the set threshold, preventing the circuit from overloading. When the consumption is within the threshold, the detector then switches to the voltage detection mode, allowing it to maintain the set voltage.

In summary, the BD4945G-TR is a power supply monitoring IC which helps to provide over-voltage, over-current, and temperature protection for circuits. It has an application field covering multiple markets such as consumer products, appliance and industrial machinery. Additionally, the BD4945G-TR employs three working modes to monitor the power supply levels, voltage, and current consumption of circuits.

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