LX1735 EVAL KIT

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Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS

The LX1735 EVAL KIT from Littelfuse is an off-line SMPS evaluation board that has an extended application field and encompasses various working principles to enable the user to carry out their respective tests. This evaluation board provides users with skills for evaluation, design and prototyping of off-line SMPS solutions, and covers aspects such as input voltage, switching frequency, power factor correction (PFC), power factor (PF) etc. This Evaluation Kit is suitable for power applications ranging from 15W to 300W.

The LX1735 EVAL Kit has a wide array of application fields including Hot Plug Adapter, LED Driver, Medical Applications, consumer and Industrial applications. The working principle of this EVALKIT involves a closed-loop design that offers high performance, high accuracy and high protection features. The design uses a unique power loss sensing (PLS) technology which enables the evaluation Board to sense the input source and adjust the switching frequency for optimum performance and efficiency. It also incorporates synchronous rectification to reduce the power loss of the rectifying element. The switching frequency of the kit can be adjusted in order to optimize the efficiency of the application in hand.

The power supply in this kit consists of two ICs, an LX1735 rectangular core PWM controller IC and an LX1704 Switcher IC. The PWM controller produces a specific saw-tooth waveform that is used for generating the switching pulses at the output of the kit. The switcher receives the switching pulses from the controller, processes it and supplies the desired output. This guarantees excellent performance and superior performance. The LX1735 EVAL Kit also offers an additional feature of the switch reconnect feature which is used to reduce the peaks of the rectified output voltage.

The LX1735 EVAL Kit also incorporates an Advanced External Diagnostics feature. This allows the user to identify the output failure instantly using a simple analog point with enhanced accuracy and reliability. This diagnostic feature operates by providing a preprogrammed voltage at the output when the load drops below a certain threshold. The user can detect these ripple values to identify the fault and diagnose the output circuit efficiently without having to disconnect the components foranalyzing the output in signals.

The LX1735 EVAL Kit also integrates leading edge dimming feature which allows the user control the on/off flickering of the LED backlight. This can be used to adjust the brightness and the illumination level of the LCD screen to a desired level. The dimmer can also be used to adjust the contrast or the overall brightness of the display more accurately and quickly. It also minimizes the power consumption.

The LX1735 EVAL Kit is equipped with a wide range of safety features. These features include rugged under voltage lockouts, slow start control, Kynix SOA protection and Over Temperature Protection. These features can protect the board and the components from being damaged due to faults or excessive operating temperatures. The evaluation Kit also supports multiple sequences of fault-protection for both AC-DC and DC-DC layouts, thus providing utmost safety.

The LX1735 Evaluation Kit also incorporates a GUI based software which allows the user to access and control the operations of the board. This software also helps the user to manage and design different custom layouts and provide detailed reporting for each board after completion. This GUI software has an intuitive graphical layout, making it easier for the user to understand and work with.

In conclusion, the LX1735 EVAL Kit offers a great application field and a wide range of working principles to enable users to carry out their respective tests. The kit has a variety of application fields and is capable of providing features that guarantee excellent performance and superior efficiency. The advanced features such as External Diagnostics and Advanced LED dimming have helped it to provide accurate measurements and efficient operation. This Evaluation Kit also provides a user-friendly GUI to ensure an easier operation for the user and a more efficient output. Thus, the LX1735 EVAL Kit is a great evaluation board for testing and evaluating off-line SMPS solutions.

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