LS75-3.3

AC/DC converters are types of electrical network that can convert alternating current (AC) to direct current (DC). The transformer-isolated DC/DC converter, or LS75-3.3, is a typical example of this conversion.

The LS75-3.3 is a high-efficiency, high-power density, and low-profile solution that supports a wide range of output voltages (from 3.3V to 48V). It is a fully isolated, single-output converter that utilizes a forward converter topology with a full-bridge transformer. This DC/DC converter also features a high frequency power supply with robust EMI performance.

Application Fields

The transformer-isolated DC/DC converter, or LS75-3.3 converter, is ideally suited for a wide range of nominal input voltages, up to 600V linear, and a wide input frequency range of 45 - 65 Hz. It can be used for a variety of applications, including industrial, industrial automation, telecommunications, networking, automotive, and other commercial, industrial, and consumer products. This converter\'s wide input voltage and frequency range make it suitable for a variety of power supplies, from small consumer electronics to large industrial machinery. Other applications include LED lighting, solar inverters, security systems, and UPS systems.

Working Principle

The core component of the transformer-isolated DC/DC converter is a full-bridge transformer. The basic operating principle involves several stages: input AC voltage is rectified to DC; the AC voltage is then converted by the main switch to a DC output voltage; the main switch is opened when the available voltage exceeds the desired output voltage; the main switch then closes during the next portion of the power cycle and power is delivered to the output. This cycle repeats at a frequency determined by the control loop.

The full-bridge transformer ensures that the output voltage is isolated from the input voltage, providing additional safety. The full-bridge transformer also provides galvanic isolation between the input and output, which helps to reduce conducted emissions and Ground-Lift/Low-Frequency Noise (GL/LFN) sources. In addition, the high-frequency switching allows the DC/DC converter to produce high power conversion efficiency and low output ripple.

Conclusion

The transformer-isolated DC/DC converter, otherwise known as the LS75-3.3, is a reliable, high-efficiency, and low-profile power supply solution. It is extremely versatile and can be used for a variety of applications. This converter utilizes a forward converter topology with full-bridge transformer to provide galvanic isolation between the input and output, allowing it to make high power conversions with low output ripple.