H11G1SR2VM Isolators

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Optoisolators - Transistor, Photovoltaic Output

H11G1SR2VM optically isolated devices are designed to provide an isolated unreliable voltage with high reliability, a low input current and wide operating temperature range. These opto-isolators are widely used in a variety of applications, including automotive electronics, industrial automation, and aerospace systems.

Application Fields

H11G1SR2VM opto-isolators have many applications, including in motor control circuits, in electrical power supplies, or in other power applications. In motor control circuits, these optoisolators can isolate the control signal circuit from the power circuit, preventing potential electrical accidents or damage caused by a flashover. For electrical power supplies, they are used to safely isolate the circuit from any potential overloading effect, preventing sudden overloading or excessive current flow.

Furthermore, these optoisolators can also be used in instrumentation or industrial systems. These systems require a high level of electrical isolation to operate properly and guarantee a reliable operation. This opto-isolator is also used in general control and automation applications, such as for PLCs (programmable logic controllers). It can provide a high level of safety and reliability even in harsh operating environment.

Working Principle

The working principle of H11G1SR2VM opto-isolators is based on the photoemission effect. A light signal is used to induce an electrical current flow in the device. This current is then isolated from the rest of the circuit, making the optoisolator a highly reliable switching device. The input current is typically very small, making it suitable for low power application.

The light signal is generated by the internal LED (light emitting diode). This LED is powered by the control voltage and the light emitted is detected by the internal detector. The detector then creates an isolated current that is proportional to the input voltage. This current, together with the collector voltage, creates an isolated voltage which is used to trigger the optoisolator.

The collector voltage, which is typically in the range of 5 to 30 VDC, serves both as the control voltage and the collector voltage. This ensures the proper working of the optoisolator and allows for a wide range of applications. Moreover, thanks to its wide temperature range, it can be used in harsh operating environment.

In order to ensure a reliable performance, the optoisolator is often equipped with an extra phototransistor which acts as a buffer, preventing the optoisolator from being damaged by external spikes or sudden overcurrents. This extra phototransistor provides added protection and safety in sensitive applications.

Conclusion

H11G1SR2VM opto-isolators provide a high level of isolation and reliability, suitable for a wide range of applications. Thanks to its small input current and wide temperature range, it can be used for both high power and low power applications with reliable and safe operation. The internal LED provides a controlled light signal which is detected by the internal detector, producing a current proportional to the control voltage. Finally, the extra phototransistor buffer acts as a safety mechanism, protecting the optoisolator from unexpected spikes and overcurrents.

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