ISO3116I-120

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DC DC converters are electrical devices that can convert a direct current (DC) to a different DC output voltage. The ISO 3161-120 application field and working principle are specific details for these type of converters, in particular for DC voltage changes. They are used in many applications including voltage regulation, battery charging control and circuit protection.

The ISO 3161-120 specifies that an ISO 3161-120 compliant DC DC converter be able to accept input voltages between 9 and 24 volts. The output should be able to produce 1.5 to 16 volts. The current should be adjustable between 1A to 200A.

The working principle of these converters relies on a magnetic field. These converters contain one or two transformers, which convert the input voltage to a higher voltage and then step it down to match the required output voltage. This is done through the use of an inductor or a transformer in the magnetic circuit. The primary winding of the transformer is fed with the voltage to be regulated and the secondary winding is then connected to the output voltage.

The first step of operation is to start the converter. In order to do so, the voltage is applied to the primary winding, thus creating a magnetic flux that will cause a voltage drop across the transformer. The transformer then passes this voltage drop through the secondary winding, creating the output voltage.

The next step is to adjust the output voltage. This is done by varying the current in the primary winding and in the secondary winding. In order to adjust the expectations, the current flow in the primary winding should exceed the current flow in the secondary winding. This creates an inductive coupling between the two, which regulates the output voltage.

The maximum input and output voltages of an ISO 3161-120 compliant DC DC converter are not fixed but are adjustable. The output voltage can be increased or decreased as required by varying the current supply to the primary and secondary winding. As the primary voltage changes, the output voltage changes accordingly, based on the inductive coupling between the two windings.

The output voltage is further regulated by the use of a feedback transistor. This transistor acts like a resistor and helps reduce the output voltage as required. This makes the output voltage more stable and predictable over temperature, load and frequency changes.

In summary, ISO 3161-120 compliant DC DC converters are designed to accept input voltages between 9 and 24 volts, and to produce output voltages between 1.5 and 16 volts. The current should be adjustable between 1A and 200A, and the output voltage should be adjustable through the use of an inductive coupling between the primary and secondary windings. The use of a feedback transistor is necessary to regulate the output voltage for increased stability and reliability.

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