SRAH-03A1800

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DC-DC converters are power electronics circuits used to convert direct current (DC) input to a different voltage level with direct current output. This type of device is used to transfer energy between multiple components, such as DC motors, LED lights, and other types of control electronics. The SRAH-03A1800 is a high-efficiency, compact DC-DC converter specifically engineered for applications that require extreme ruggedness, long life, and high temperatures. The SRAH-03A1800 is designed for industrial and automotive applications, and is ideal for a wide range of power management applications.

The SRAH-03A1800 offers wide input voltage range of 4.5-60 VDC with an output voltage of 4.5-60 VDC (4.5-50 VDC for high temperature models). It is capable of full-load operation from -40°C to 100°C (up to +135°C with derating). It is designed with world class efficiency (up to 95%) with a maximum output current of 125 A. The SRAH-03A1800 also comes with voltage, current, and temperature protection and accepts PWM input control signals. The unit also features built-in EMI filtering.

The working principle of the SRAH-03A1800 is quite simple. It utilizes a full-bridge rectifier and an LLC(Resonant conversion) circuit topology to convert AC power to a controlled DC output. This topology has advantages of lack of an EMI filter and reduced overall system size due to the resonant nature of the LLC circuit. The LLC converter allows the transistor to operate at higher switching frequencies, thus reducing output noise and ripple. The full-bridge rectifier helps reduce the power losses and reduce the risk of electrostatic discharge. By utilizing these two elements in combination, the overall efficiency of the SRAH-03A1800 is increased.

The output voltage of the SRAH-03A1800 is regulated by a closed-loop control method using an error amplifier. The feedback signal is derived from the output voltage, and after comparing with a reference voltage from the system, an error is raised and amplified. The amplified error signal is then sent to a pulse-width modulated switch to adjust the output voltage. The closed-loop control also helps improve the output voltage stability over a wide range of environmental and operating conditions.

The SRAH-03A1800 is a high-performance, efficient, and compact DC-DC converter. Its unique combination of full-bridge resonant LLC and feedback loop regulation provides increased power density and ruggedness for a range of industrial and automotive applications. Its wide input voltage range and high temperature range make it an ideal choice for power management applications in a variety of environments.

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