LM2733XEVAL/NOPB

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The LM2733XEVAL/NOPB is an evaluation board used to evaluate the LM2733 current mode high-voltage PWM controller in a low-power offline switch mode power supply (SMPS) application. The board can be easily configured for either a buck, boost, buck-boost, or sepic application. It has the capability to generate output voltages as high as 80Vpk for applications such as DC-DC converters, motor controllers, high-voltage supplies for instrumentation, solar panel trackers, and even DC-to-AC conversion.

The board has an onboard sense resistor that is used to control the output voltage and is connected between the output voltage rail and ground. The resistors are sized for the application. A jumper is provided to configure the controller for either current mode or voltage mode control operation. Two external capacitors are used to stabilize the gate drive frequencies and are connected between the RESET and DRV pins of the controller.

The board also includes an onboard current-sense amplifier and comparator. This amplifier is connected between the Source pin and ground, and it amplifies the difference between these two points to provide feedback to the controller. The amplifier is configured by the external resistor between these two points. The comparator is used to detect an overcurrent condition and provide a latch-off signal to the controller to shut down the power supply.

The converter characteristics of the board can be changed by adjusting the values of external components. These include the input inductor, output inductor, input capacitor, output filter capacitor, and output rectifier. These values can be changed to meet specific application requirements. Also, a voltage feedback pin is provided to set the output voltage.

The LM2733XEVAL/NOPB evaluation board includes a power supply that is used to power the board. This power supply is connected to the +3.3V and +1.2V supplies of the evaluation board. The power supply must be able to support the peak current needs of the application. The power supply input is connected to the output of a DC/DC converter with a voltage rating of 5V or 12V.

The board can be connected to either a PC or an external control device, such as an integrated development environment (IDE) or a microcontroller, to program the settings of the associated LM2733 current mode high-voltage PWM controller. The board includes an RS-232 serial port to connect the device to a PC, and an I2C port for applications requiring I2C communication. The board also includes a Micro USB port for programming the controller. An LED is included to indicate the board\'s operating status.

The LM2733XEVAL/NOPB evaluation board can be used to evaluate the LM2733 current mode high-voltage PWM controller in a wide variety of applications, from DC-DC converters to motor controllers. It is easy to change the converter characteristics of the board to meet specific application requirements. The board includes an onboard power supply, current-sense amplifier and comparator, and the ability to connect to a PC or external control device to program the controller. Overall, the LM2733XEVAL/NOPB evaluation board is a powerful tool for evaluating the LM2733 current mode high-voltage PWM controller for a wide range of applications.

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