LM2596S-ADJEVM

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LM2596S-ADJEVM application field and working principle

The LM2596S-ADJEVM is a DC-to-DC evaluation module by Texas Instruments, specifically designed to evaluate the LM2596S DC-to-DC switching regulator.

The LM2596S-ADJEVM is an Evaluation Board (EVM) which operates as a simple switch mode power supply (SMPS). It provides a controlled, low-noise power supply output with variable voltage levels, tailored for laboratory equipment or prototyping with a wide variety of small loads. The user can adjust the power output of the EVM with two potentiometers, capable of providing up to 1.2A of current at 5V, 8V, 12V and 15V outputs.

Application Field

The LM2596S-ADJEVM works as a DC-to-DC converter in off-line mode and is similar to a power supply for a PC or a laptop. It can be used in a variety of applications such as CCTV equipment, industrial automation systems, test benches or portable battery chargers. It can also be used for driving high-power LEDs. It is designed to accept a wide range of input voltages which makes it suitable for most applications.

Working Principle

The basic operation of the LM2596S-ADJEVM is based on the principle of pulse-width modulation (PWM). A PWM is basically an electrical signal with a certain frequency and pulse duration. This signal is then used to regulate the power supply output. The LM2596S-ADJEVM employs an external control circuit to ensure a stable output voltage, regardless of the load current.

When power is applied to the input, the PWM signal is generated by an internal oscillator. This signal is fed to a high-speed power amplifier which switches the external MOSFET in order to produce a square wave. This square wave is then filtered to generate the output voltage.

The output voltage is adjustable through two potentiometers. The first one is used to set the output voltage, while the second one is used to control the duty cycle of the output voltage. This makes it possible to obtain a stable output voltage with a wide range of peak-to-peak values.

The LM2596S-ADJEVM can provide a maximum output current of 1.2A. This means, it can be used to power higher power applications such as servo motors, as long as the maximum output is not exceeded.

Conclusion

In conclusion, the LM2596S-ADJEVM is a versatile DC-to-DC converter suitable for a wide range of applications. It is designed to provide a stable output voltage with adjustable peak-to-peak values and a maximum output current of 1.2A. This makes it perfect for laboratory equipment, industrial automation, test benches, portable battery chargers and high-power LED applications.

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