S7AH-03H1200

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DC DC Converters

DC DC converters are devices that convert direct current (DC) electrical power from one voltage level to another. This type of device is widely used in many electronic applications and systems, including digital computers, communications systems, aerospace systems, automotive electronics, security systems, and home appliances. The S7AH-03H1200 is a compact DC-DC converter module with two converters, which can provide a more stable output voltage over a wide temperature range with efficient power conversion and a high power density. In this article, we’ll discuss the S7AH-03H1200 application field and working principle.

Application Field

The S7AH-03H1200 is an isolated DC-DC converter module with a wide input voltage range from 4.5 VDC to 24 VDC/90–105 Vac, and an output voltage range from 5 VDC to 15 VDC. It can be used in both commercial and industrial applications. It is widely applied in distributed power systems, telecommunications, instrumentation, audio/video equipment, medical instruments, control systems, motors, sensors, Uninterrupted Power Supplies (UPSs), transportation electronics, marine devices, and other applications. It is designed to satisfy stringent EMI requirements and has an MTBF of 1,100,000 hours.

Working Principle

The S7AH-03H1200 DC-DC converter module is based on a Pulse Width Modulation (PWM) topology. It consists of two integrated circuit (IC) devices, an active bridge rectifier, and an output stage. The input stage rectifies the AC voltage of the input power source into DC voltage. The PWM controller IC provides the duty cycle control, voltage control, temperature control, and over-current protection. The active bridge rectifier is composed of four switching transistor and diode elements, which allow highly efficient power conversion from input to output voltage. The PWM controller IC monitors the output voltage by continuously adjusting the duty cycle of the switching transistors, and the output voltage is maintained at the set level. The output stage is composed of several switching transistors, which are driven by the PWM IC to regulate the output of the DC-DC converter. Furthermore, it also includes several protection functions, such as UVLO, OCP, OTP, and any other fault conditions.

The S7AH-03H1200 features high efficiency, low standby power consumption, and ripple and noise. These features can help increase the system’s reliability and reduce the system’s power cost. It also has built-in compensation functions, such as frequency fold-back, output current limiting, output voltage trimming, and input inrush current limiting. It is also designed with a total power can reach up to 34 W in full load, and it has a wide output voltage range from 5 V to 15 V. The S7AH-03H1200 is compliant with EN55022 Class B standard, and UL/IEC/EN60950, thus providing a higher safety level on the system.

In conclusion, the S7AH-03H1200 DC-DC converter module is an effective and reliable solution for distributed power systems, telecommunications, instrumentation, audio/video equipment, medical instruments, control systems, motors, sensors, Uninterrupted Power Supplies (UPSs), transportation electronics, marine devices, and other applications. It provides excellent performance and meets the necessary standards, making it an ideal choice for these applications.

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