H11AA1SM

Series:	--
Packaging:	Tube
Part Status:	Active
Number of Channels:	1
Voltage - Isolation:	4170Vrms
Current Transfer Ratio (Min):	20% @ 10mA
Current Transfer Ratio (Max):	--
Turn On / Turn Off Time (Typ):	--
Rise / Fall Time (Typ):	--
Input Type:	AC, DC
Output Type:	Transistor with Base
Voltage - Output (Max):	30V
Current - Output / Channel:	50mA
Voltage - Forward (Vf) (Typ):	1.17V
Current - DC Forward (If) (Max):	60mA
Vce Saturation (Max):	400mV
Operating Temperature:	-40°C ~ 100°C
Mounting Type:	Surface Mount
Package / Case:	6-SMD, Gull Wing
Supplier Device Package:	6-SMD

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Optoisolators - Transistor, Photovoltaic Output

An H11AA1SM optoisolator is an isolation barrier between two devices using a transistor which controls the current flow going from the input to the output. The optoisolator utilizes a photovoltaic output to control the transistor switch, thus producing an isolation between input and output.As optical isolation is an important safety feature for many devices, the optoisolator provides a reliable and robust method which can handle a range of voltage and current variables. The optoisolator also employs current limiting protection to protect the output side of the circuit.The H11AA1SM optoisolator consists of a pair of LEDs and phototransistors within a single package. The LEDs are responsible for emitting light or infrared signals. One LED is placed inside the package and the other is placed outside in the most advanced construcation model. The external LED is the optical source, while the internal one serves as the photodetector for the optoisolator. This arrangement isolates the optoisolator from the environment during operation, protecting it from electromagnetic interference.The LED on the optoisolator side is the input side which converts electrical signals to optical ones. Incoming electrical signals are converted to a series of flashes of light which cause the internal photodetector inside the optoisolator to send corresponding electrical signals to the output side. At the same time, the transistor switch inside the optoisolator is activated to control the current flow. The optoisolator utilizes photovoltaic output to control the transistor switch. When activated by optical signals, the internal photo-detector produces a small current, resulting in a voltage drop across the base-emitter junction of the output transistor. This voltage drop causes the base of the output transistor to turn on, which in turn activates the switch and allows the current to flow through the transistor.Since the photodetector is isolated from the environment, the optoisolator is less prone to electrical noise interference and therefore offers high isolation levels of up to 10KV. The H11AA1SM optoisolator is suitable for applications that require isolation between input and output signals. It is ideal for applications such as AC and DC motors, power supplies, and motion control circuits.In conclusion, the H11AA1SM optoisolator provides a reliable and efficient method of optical isolation. The photovoltaic output enables the optoisolator to switch current manually through the output transistor, thus providing high isolation levels up to 10KV. The optoisolator is suitable for a range of applications such a power supplies, motion control circuits, and AC and DC motors.

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