IH0512SH

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DC-DC converters are widely used in the electronics industry to provide the regulated DC voltage from one DC input voltage supplied by a battery, AC/DC wall adapter, or other DC voltage source. The IH0512SH is a DC-DC converter designed to take a high input voltage from 48 to 400VDC and reduce it to a 12Vdc load current of up to 5A.

The IH0512SH utilizes a topology commonly referenced as a flyback converter which is used in power supplies that employ the use of a step-down transformer to provide an isolated output. The device requires a minimal number of external parts allowing it to be broadly used in applications with space or cost constraints such as consumer electronics such as cell phones, medical systems, and other mobile applications.

The IH0512SH is based on a single-stage topology which provides a high power density. This topology is straightforward to configure and is highly efficient because it reduces the amount of power consumed during the voltage conversion process. Additionally, the device utilizes integrated MOSFETs along with a high frequency switching topology that reduces EMI.

At startup the control IC begins by resetting the output and reading the VDCIN voltage. It then sets a duty cycle to regulate the switching cycle and power the output. The IC also controls the frequency provided by the converter to determine the size of the voltage stress and adapts the duty cycle and switch to maintain the output voltage with minimal power loss. The IC utilizes current mode control, primary side regulation, soft-start, overvoltage protection and an active current-limit circuit in order to ensure robust operation under varying conditions.

The IH0512SH offers high efficiency and low ripple while maintaining industry-standard voltage accuracy without the need for complex circuitry. It allows designers to develop compact solutions when they need to deliver up to 5A of power from a regulated 12Vdc output. The IH0512SH offers robustness, simplicity and performance in applications requiring high input voltages and high currents.

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