H11G3SD

Output Type:	Darlington with Base
Supplier Device Package:	6-SMD
Package / Case:	6-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 100°C
Vce Saturation (Max):	1.2V
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.3V
Current - Output / Channel:	--
Voltage - Output (Max):	55V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	--
Turn On / Turn Off Time (Typ):	5µs, 100µs
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	200% @ 1mA
Voltage - Isolation:	5300Vrms
Number of Channels:	1
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators are isolating devices that use optoelectronic technology to provide galvanic isolation between two signals or circuits. These devices are often used to prevent the transmission of high voltage analogue signals, switching signals, pulses, data, or noise. The H11G3SD is one type of optoisolator, and is specially designed with a transistor photovoltaic output type.

Overview

The H11G3SD is a single-channel small-signal phototransistor optoisolator with a photovoltaic output type. It consists of an LED, or light-emitting diode, and a phototransistor, both of which are encapsulated in a single plastic package. The LED is typically the input element, while the phototransistor is the output element. The device is designed to provide isolation between two circuits that cannot be connected directly.

Applications

The H11G3SD is commonly used in applications where isolation of high voltage analogue signals, switching signals, pulses, data, or noise are required. For example, it can be used to protect sensitive logic components from high voltage signals, and to isolate power supply noise from signal circuits. Other common applications include telecommunications, instrumentation, industrial electronics, motor controls, audio equipment, and medical equipment.

Working principle

The H11G3SD uses the principle of photoconductivity to achieve galvanic isolation of two circuits. The process is initiated when the input signal causes the LED to emit light. The light is then detected by the phototransistor which generates an output current proportional to the intensity of the light. This current is then used to control the output device, such as a relay or motor. As the circuits are not electrically connected, the device can achieve perfect isolation.

Other features

The H11G3SD is designed to be highly reliable, with a typical isolation voltage of 5,000 V rms, and a guaranteed isolation voltage of 1,500 V peak. It has a working temperature range of -40°C to 85°C. It has a current transfer ratio of 30 to 100%, meaning that the output current is 30 to 100% of the input current. Finally, the device has a response time of 50 μs.

Conclusion

The H11G3SD is a single-channel small-signal phototransistor optoisolator with a photovoltaic output type. It is commonly used in applications where isolation of high voltage analogue signals, switching signals, pulses, data, or noise is required. The device uses the principle of photoconductivity to achieve galvanic isolation of two circuits, and is designed to be highly reliable with a wide range of features.

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