MAX1709EVKIT

The MAX1709EVKIT is a evaluation board for complete DC/DC and AC/DC (Off-Line) switching mode power supply (SMPS) solutions. It allows engineers to explore the operating limits of the MAX1709 and evaluate various topologies.

The MAX1709 integrated circuit is a current-mode control cyclo-converter, designed especially for AC/DC applications. It offers many features, such as integrated high and low-side power MOSFET drivers, current-mode overcurrent protection, and undervoltage lockout. It also features an OTP memory block for storing parameters, such as maximum current and ramp rate.

The MAX1709EVKIT features a step-down transformer, which can operate from 30V to 70V. Two pairs of MOSFETs are connected to the Texas Instruments UCC28022 integrated driver for optimal active-and-standby operation. An external inductor provides regulation of the output current. The frequency is set by an external resistor, and the OTP memory contains the required parameters for maximum efficiency and reliability.

The MAX1709EVKIT provides a visualization of the power supply’s operational characteristics. The input/output voltages and currents, and the efficiency are displayed on an LCD panel. The board can also be used to vary the load continuously and measure the power associated with thisload. This is done by monitoring the board’s current consumption from the supply voltage.

In summary, the MAX1709EVKIT application field and working principle is composed of an integrated circuit current-mode control cyclo-converter, providing a complete DC/DC and AC/DC (off-line) SMPS solutions. It features a step-down transformer, two pairs of MOSFETs, and an external inductor connected to a TI integrated driver. The efficiency and the input/output characteristics are displayed on an LCD panel. The evaluation board allows engineers to explore various topologies and the operating limits of the MAX1709.