TLP521-1 Optocoupler DIP-4

Description

Features: The TLP521-1consists of a photo-transistor optically coupled to a gallium arsenide infrared emitter diode. This device can be used for applications where galvanic isolation is necessary, like Switch Mode Power Supply, relay driver board, etc. The TLP521 is an optocoupler that has a photo-transistor that is controlled based on light (photon). And on the opposite side, it has an IR (infrared) LED. When the IR LED is powered, the light from the LED is collected by the receiver of the transistor and it conducts. This IC is used to provide electrical isolation between two circuits, one part of the circuit is connected to the IR LED and the other to Photo-transistor. The digital signal given to the IR LED will be reflected on the transistor but there will be no electrical connection between the LED and the transistor. This comes in very handy when you are trying to isolate a noisy signal from your digital electronics, so if you are looking for an IC to provide optical isolation in your circuit design, then this IC might be the right choice for you. Pin Assignments: Pin Number Pin Name Description 1 Anode Anode pin of the IR LED. Connected to logic input 2 Cathode Cathode pin of the IR LED. Connected to ground 3 Emitter Cathode pin of the IR LED. Connected to ground 4 Collector Collector pin of the Transistor. Provides logical output Specifications: Datasheet TLP521-1 Product Category Transistor Output Optocouplers Series TLP521 Model TLP521-1 Output Type NPN Phototransistor Mounting Style Through Hole Package/Case DIP-4 Number of Channels 1 Channel Isolation Voltage 2500 Vrms Current Transfer Ratio – Min 100 % Current Transfer Ratio – Max 600 % If – Forward Current 16 mA Vf – Forward Voltage 1.3 V Max. Collector Emitter Voltage 55 V Collector-Emitter (B.D.) Voltage 55 V Maximum Collector Current 10 mA Max. Collector Emitter(Sat.) Voltage 400 mV Rise Time 2 µs Fall Time 2 µs Vr – Reverse Voltage 5 V Pd – Power Dissipation 250 mW Current Transfer Ratio 100 % to 600 % Operating Temperature – 25 °C to + 85 °C Applications: Electrical Isolation circuits. Microcontroller I/O switching circuits. Signal isolation. Noise coupling circuits. Isolation of digital from analog circuits. Ac/DC Power control. Datasheet: TLP521-1

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