RAA230408GNP#HA0

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The RAA230408GNP#HA0 is a PMIC - Voltage Regulators - Linear + Switching device that includes both a linear voltage regulator and a switch-mode power supply. This integrated device is ideal for applications that require a combination of power regulation and digital power supply controls. It has been designed to provide a wide range of functionalities, including the ability to regulate the output voltage from 0.5 V to 5.33 V, and programmable current limit. It also provides protection against inrush current, over voltage, and short-circuits. The device includes on-board power management circuitry and operates from a single +5 V supply.

Application Field

The RAA230408GNP#HA0 device is suitable for a wide variety of applications, such as audio/video equipment, displays, sensors, and home automation systems. It can be used to provide regulated voltage and current to integrated circuits, transistors, and relays. Additionally, this device can be used in applications that require overvoltage and short-circuit protection, such as low voltage power supplies and motor control circuits.

Working Principle

The RAA230408GNP#HA0 device is an integrated linear / switch-mode power supply (SMPS) regulator. Its output is controlled by an on-board microcontroller, which implements a power control loop for maintaining the output voltage at the desired level. To ensure proper operation, the input and output both must be connected to the supply voltage. Once the supply voltage is connected, a power-on-reset (POR) circuit is responsible for ramping up the output voltage from zero to the desired value.

The linear amplifier is responsible for controlling the output voltage. It is based on a conventional amplifier topology, which uses an external feedback resistor to adjust the output voltage. The unit can be programmed via the on-board microcontroller, allowing users to configure the features of the device, such as the output voltage and current limit. The device also includes an over-voltage protection (OVP) circuit to shut down the power supply in the case of an over-voltage condition.

Additionally, the device includes a switch-mode power supply (SMPS) circuit that is used to provide a smooth, low-ripple output voltage. The SMPS circuit utilizes an oscillator and a switching transistor to generate a square wave at the desired frequency. A low-pass filter is subsequently used to convert the square wave into a steady DC output. The oscillator frequency can be adjusted for efficiency and stability.

The RAA230408GNP#HA0 device also includes on-board protection circuits for protection against over-current, short circuits, and inrush current. The unit is available in a DIP8 package and is RoHS compliant.

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