LM2622EVAL

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LM2622 is an evaluation board of DC/DC & AC/DC (Off-Line) SMPS designed to evaluate the features of STMicroelectronics\' LM2622 Switched-Mode Power Supply (SMPS) controllers. The main aim of the board is to evaluate the features of the LM2622 SMPS controller in order to provide an insight into the working principle of the device and its application field.

The LM2622 controller supports wide input voltage range and output power and has low stand-by current. It integrates an input voltage regulator and a PWM controller to offer a complete solution for the implementation of low power-off SMPS. The board features an integrated driver and a range of extended power ports, which allow easy evaluation of the LM2622 features and the application field. Moreover, it is provided with an auto-tune feature that enables the optimization of the system parameters.

The board features the LM2622 in an SOP-8 package. Its working principle is based on the self-oscillation hysteretic control. The board works by using a voltage comparator with an internal reference voltage and a pair of transistor switches connected to the buck inductor. The input voltage is controlled by the basic PWM control circuit. The output is regulated by an opto-coupler that reduces the high switching frequency, and by a simple peak current feedback loop.

In addition, the evaluation board includes a set of test points, On/Off switch, trimming capacitors, and a jumper for manual calibration. It also has an external sense circuit to adjust the output current, a bootstrap diode to control the main transistor switch, and a soft-start circuit to reduce the inrush current.

Using the board, the LM2622 SMPS controller can be evaluated in order to provide a better understanding of the device and its capabilities. The board features a wide input voltage range (14.5V to 20V) and output power (5A). It also provides a low stand-by current and reaction time. Moreover, it features a simple peak current feedback loop and a soft-start circuit to reduce inrush current.

In conclusion, the LM2622EVAL is a versatile and powerful evaluation board for the evaluation of LM2622 Switched-Mode Power Supply (SMPS) controllers. Its features, high efficiency, stability, and fast response time make it suitable for use in a wide range of applications. The board allows users to evaluate the LM2622 and gain an insight into its working principle and application field.

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