ACPL-217-50AE

Output Type:	Transistor
Supplier Device Package:	4-SO
Package / Case:	4-SOIC (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	400mV
Current - DC Forward (If) (Max):	50mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	50mA
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	2µs, 3µs
Turn On / Turn Off Time (Typ):	3µs, 3µs
Current Transfer Ratio (Max):	160% @ 5mA
Current Transfer Ratio (Min):	80% @ 5mA
Voltage - Isolation:	3000Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators have become extremely popular in the electronics industry due to their unique ability to electrically isolate input and output circuits, creating impenetrable barriers between noise and high power or sensitive components. The construction of optoisolators involves the use of semiconductor light-emitting elements, optocouplers, also known as opto-isolators, to create the capacitor-coupled physical isolation of the two circuits.

The ACPL-217-50AE optoisolator from Avago Technologies is a single channel, photovoltaic output device that provides electrical isolation of 1.5 kV rms for a single domain. It utilizes Avago’s advanced integrated optics technology, which provides for an integrated light source/photodetector combination in a monolithic design. This unique feature allows for very cost effective and reliable LED performance and superior EMI/RFI noise immunity.

The ACPL-217-50AE features a wide input-to-output capacitance ratio, which reduces circuit noise radiation and eliminates the risk of load capacitance-induced oscillations. The built-in NPN output transistor ensures a high-voltage output, while improved LED current regulation improves steady state LED performance and ensures that the output transistor is not prematurely damaged by a surge in LED current. In addition, the ACPL-217-50AE has temperature compensation to ensure an extended temperature range from -25 degree Celsius to 85 degree Celsius.

In terms of its application field, the ACPL-217-50AE is well suited for use in electrically noisy environments, where its superior EMI/RFI noise immunity can be very useful. It is also well suited for automotive, industrial, medical, as well as telecommunications applications given its wide temperature range and high voltage isolation. Moreover, the device’s high displacement endurance makes it ideal for applications where large transients are expected, such as AC power supplies.

In terms of its working principle, the ACPL-217-50AE utilizes a light-emitting element, such as a light-emitting diode (LED) or laser diode, and a photodetector, such as a photodiode or phototransistor, to provide electrical isolation. When the LED is driven by sufficient current, the LED emits light, which is then detected by the photodetector. The photodetector then generates an output current, which is proportional to the intensity of the light. This current is then used to drive the output transistor, creating a high-voltage output.

In conclusion, the ACPL-217-50AE optoisolator from Avago Technologies is a single channel, photovoltaic output device that provides electrical isolation of 1.5 kV rms, making it well suited for use in electrically noisy environments and applications with large transients. It utilizes Avago’s advanced integrated optics technology, which provides for an integrated LED/photodetector combination in a monolithic design. This unique feature combined with its wide temperature range and high voltage isolation makes the ACPL-217-50AE an ideal optical isolator for a wide range of applications.

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