BD35230HFN-TR

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Voltage regulators are devices that offer protection against extreme voltage fluctuations, ensuring voltage accuracy and stability in complex power systems. An example of a voltage regulator within the category of linear devices is the BD35230HFN-TR. This device is a three-terminal adjustable regulator with multiple on-chip protection circuits integrated into the chip. It is also a negative voltage regulator which requires little external components for easy layout due to its low operating current with excellent ripple noise performance.

The BD35230HFN-TR voltage regulator utilizes current mode control to ensure stability during varying load and line conditions. It uses a high-gain error amplifier to compare an internal reference voltage with an external voltage, adjusting the output voltage accordingly. An external resistor divider is used to set the output voltage. The register is equipped with an on-chip temperature sensing circuit which will shut off the output voltage if the thermistor\'s temperature exceeds its rated maximum temperature.

The BD35230HFN-TR is suitable for multiple applications such as LCD monitors, DVD players, smartphones and digital home appliances. It can also be used in computer system power supply, portable devices, automotive systems among many others. The BD35230HFN-TR is designed to operate over an extended ambient temperature range of -40℃ to +150℃ and can supply a maximum output current at 500mA or less. It features a low standby current and its dropout voltage is typically 500mV at full load. Regulatory approvals for the BD35230HFN-TR include UL, TUV, CE, VDE and RoHS.

A brief overview of the BD35230HFN-TR\'s working principle begins with the sensing circuit. This circuit senses the output voltage to help ensure that it accurately tracks the programmed voltage set point. The voltage set point is determined by the ratio of the external resistor divider and its value is then amplified by the error amplifier and compared with the reference voltage. The output stage then drives the power MOSFET to regulate the output voltage until the voltage set point is reached.

To protect the system against possible faults or overloads, the BD35230HFN-TR has several integrated on-chip protection circuits: over-current protection (OCP) to prevent excessive currents through the MOSFET; over-temperature protection (OTP) to automatically shut off the output if the MOSFET\'s temperature exceeds its rated maximum; under-voltage lockout (UVLO) to prevent the device from entering into a fault state if an input voltage is too low; and soft-start circuitry which reduces inrush currents at startup. All of these features make the BD35230HFN-TR an ideal voltage regulator for a wide variety of applications.

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