SRAH-03H180R

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DC-DC converters, or DC/DC converters, are devices that convert electrical power from one DC voltage source to another, usually at a different voltage. One of the most common types is the SRAH-03H180R. This high-efficiency converter has a wide range of applications, and its working principle is based on the direct conversion of energy from one voltage level to another by means of switching semiconductor switching devices.

The SRAH-03H180R is a high-efficiency, full-wave synchronous rectification DC/DC converter module that provides an input voltage of 180 to up to 400 VDC and an output voltage of up to 30 VDC. It has a built-in, proprietary interleaved topology featuring a combination of controlled on-time two-channel switch control for improved efficiency and lower peak-to-peak current ripple. The integral EMI filter reduces noise, and the devices feature a programmable Soft-Start circuit to limit inrush current and minimize the start-up time.

The primary application fields for the SRAH-03H180R include industrial applications such as motor control, servo motor control, temperature control, and process control; telecommunication applications such as base station power supply, line cards, and router power supply; and consumer applications such as LED lighting, digital home appliances, and portable electronic devices. It has received approval for medical applications and systems.

The working principle of the SRAH-03H180R is based on the concept of synchronous rectification. Synchronous rectification is an electrical conversion technique that involves converting electrical power between two DC sources by using a single switch, such as a MOSFET, connected in parallel to both the input and output voltage sources. The switch is controlled by a pulse width modulation (PWM) signal to control the conduction of current from the input source to the output source. The PWM signal is generated by an internal circuit that is configured to provide the optimal output voltage and current levels. The switching frequency of the converter is also controlled by this circuit, which is usually in the range of 10–50 kHz.

The SRAH-03H180R features a synchronous rectification method that improves conversion efficiency and reduces losses due to power switches. It also features active current balance in the input channels for reduced current transient and improved efficiency. In addition, it incorporates a high (400 VDC) input overvoltage protection feature, as well as multiple safety functions that protect against overvoltage, overheating, and overcurrent.

The SRAH-03H180R offers reliable and precise DC/DC conversion, with high efficiency and low ripple, making it an ideal choice for applications where power supply requirement or industry regulations demand high efficiency and low noise levels. Its wide range of applications, robust design, and excellent performance make it an excellent option for many industrial, consumer, and medical applications.

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