HCPL-6751

Output Type:	Darlington
Supplier Device Package:	16-Flatpack
Package / Case:	16-Flatpack
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Vce Saturation (Max):	110mV
Current - DC Forward (If) (Max):	10mA
Voltage - Forward (Vf) (Typ):	1.4V
Current - Output / Channel:	40mA
Voltage - Output (Max):	20V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	--
Turn On / Turn Off Time (Typ):	2µs, 8µs
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	200% @ 5mA
Voltage - Isolation:	1500VDC
Number of Channels:	4
Part Status:	Active
Packaging:	Tube

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

HCPL-6751 application field and working principle

Optoisolators - Transistor, Photovoltaic Output are designed to provide galvanic isolation between the control logic and output stage of electronic circuits.Optoisolators typically consist of a light-emitting diode (LED) and a phototransistor, which creates a barrier between two circuits while still allowing them to communicate. The HCPL-7551 optoisolator is a single-channel, photovoltaic output optoisolator. It is able to handle high voltage and large current and provides isolation of up to 3000 Vrms.

Applications

The HCPL-6751 is commonly used in safety systems, automotive applications, motors, power supplies, and factory automation. It can be used to detect mechanical contact, such as switch open/close, control circuit protection, and load current detection. It can also be used for communication between a low voltage control circuit and a high voltage driver circuit, providing a safe electrical barrier between the two circuits to protect the control circuit from being influenced by the high voltage.

Operation

The HCPL-6751 optoisolator mainly consists of an infra-red LED, a phototransistor, and a feedback resistor. When the LED is illuminated, the current flows from the collector to the emitter of the phototransistor. The feedback resistor limits the current while providing a voltage drop, which is proportional to the current flowing through the collector. The voltage drop is sensed by the LED, which causes the current to remain constant. This current is then transferred to the output of the optoisolator and provides the control input to the output stage.The LED and the phototransistor must be selected carefully for the best performance of the optoisolator. The LED must be able to provide enough light for the phototransistor to be activated, while the phototransistor must be able to detect the light from the LED and provide the necessary current for the output stage. The feedback resistor must also be selected with the appropriate resistance to ensure proper operation.

Conclusion

The HCPL-6751 is a single-channel, photovoltaic output optoisolator with high isolation capabilities. It is commonly used in safety systems, automotive applications, motors, power supplies, and factory automation. It provides a reliable and safe point of communication between a low voltage control circuit and a high voltage driver circuit. Care must be taken to select the appropriate LED and phototransistor, as well as the feedback resistor, to ensure proper operation of the optoisolator.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description