LM3224MM-ADJEV/NOPB

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LM3224MM-ADJEV/NOPB is a powerful and efficient integrated circuit device, designed for off-line DC/DC and AC/DC switching power supply (SMPS) applications. It is a versatile controller, combining the features of a standard buck regulator, coupled with a low turn-on power consumption and improved line regulation.

The device is specifically designed to operate a wide input voltage range, from 2.25V to 80V, while providing an integrated high current totem pole output driver for a 3-level buck regulator. With the help of flexible power stage control, the LM3224MM-ADJEV/NOPB supports a wide range of output voltage up to 40V, with a selectable peak current limit of 500, 1000, or 1500 mA (nominal). This ensures a reliable and efficient power conversion for a wide variety of applications, ranging from power supplies for automotive, industrial, and consumer applications to motor drive applications where precise output current control is required.

The LM3224MM-ADJEV/NOPB has a programmable fractional-N frequency synthesizer, with 33 frequency settings available from 200 kHz to 3 MHz. This provides an efficient mechanism to optimize the efficiency of the power stage, allowing the user to select the optimal frequency value that provides the best performance in specific application needs. Furthermore, the device also has built-in features that address the needs of EMI compliance, such as soft start control, protected startup circuitry, over-temperature protection, over-voltage protection, under-voltage protection, line voltage feed forward, current mode feedback, and high-side monitoring. These features make the LM3224MM-ADJEV/NOPB an ideal solution for noise-sensitive applications where low-cost, efficient, and reliable power conversion is required.

The working principle of the LM3224MM-ADJEV/NOPB starts with a fixed-frequency, peak current-limited low-side switch which is connected between the input voltage and the output voltage. When the input voltage is greater than the output voltage, the low-side switch is turned on and rectified input voltage is stored into the output capacitor. When the output voltage reaches the value set in the program register, the integrated totem pole output driver will turn off the low-side switch, and the output voltage discharge path will be opened. As a result, the output voltage will maintain at the constant, predetermined voltage level. If the input voltage is lower than the output voltage, the regulator will deactivate the low-side switch, which will allow the output voltage to drop to maintain the output current.

Overall, the LM3224MM-ADJEV/NOPB evaluation board is an ideal solution for off-line DC/DC and AC/DC switching power supplies. Its wide input voltage range, low turn-on power consumption, improved line regulation, programmable frequency synthesizer, EMI compliant features, and over-temperature protection make it a true jack of all trades that provide reliable and efficient power conversion for a variety of applications.

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