High Speed Optocouplers

Characteristics of high-speed optocouplers:

(1) Conversion rate up to 10MBit/s;
(2) Swing rate up to 10kV/us;
(3) The fan out coefficient is 8;
(4) Logic level output;
(5) Open collector output;

  High speed optocoupler parameters:

Working temperature range: -40 ° C to+85 ° C
Maximum input current, low level: 250uA
Maximum input current, high level: 15mA
Maximum allowable low-level voltage (output high): 0.8V
Maximum allowable high-level voltage: VCC
Maximum power supply voltage, output: 5.5V
Fan out (TTL load): 8 (maximum)

1. In switch circuits, good electrical isolation is often required between the control circuit and the switch, which is very difficult for general electronic switches, but it is easy to achieve with it, so 6n137 has 

electrical isolation function.

2. Used for bistable output circuits: It can effectively solve the problem of output and load isolation, as the light-emitting diode can be connected in series with two emitting circuits.

3. Due to its superior anti-interference and isolation performance compared to transistors, it forms various logic circuits, making them more reliable.

4. Applied to digital circuits: can amplify pulse signals.

5. Applied to high-voltage control: replacing transformers, replacing contact relays and contact relay A/D in various situations, such as circuits.

In fact, the structure of high-speed optocouplers is different from that of ordinary optocouplers. The structure of high-speed optocouplers is a photodiode+amplification drive circuit, while the structure of ordinary optocouplers is a phototransistor (+amplification drive circuit). The response speed (rise and fall time) of a photodiode is in the nanosecond range, while the response speed (rise and fall time) of a phototransistor is in the microsecond range. It's not that a regular optocoupler can operate at high speed in the linear region, its inherent response time is limited, and it can't even speed up if it wants to.
In addition, if a regular optocoupler operates in the linear region, it will also be limited by the parameter Fc (Cut off Frequency). The Fc of a regular optocoupler is basically around 50KHz (under test conditions of VCC=5V, IC=5ma, RL=100R, increasing RL will make Fc smaller, and when RL=1K, Fc will be around 10KHz). For example, TLP521 has Fc around 50KHz, PC817 has Fc around 80KHz, CNY117 has Fc around 250KHz.

Founded in 2004, Lighting Ltd. specializes in the packaging of medium- and high-power LED devices for lighting; and moved its factory to Fujian Hutou Optoelectronic Industrial Park in 2017.

In Fujian, we have more than 25,000 square meters of factory buildings and more than 20,000 square meters of ultra-clean, anti-static modern dust-free workshop.

Passed IATF16949, ISO9001, ISO14001, ISO45001 (OHSAS18001) quality management system certification.

Semiconductor packaging business since 2015; own optocoupler brand in 2018; optical sensor product line in 2020; integrated class packaging product line in 2021.

Dozens of invention and utility model patents, many authorized patents.

Responding to the strategic goal of China Chip: cooperating with domestic mainstream brands to actively create integrated products made in China.

Product Certifications: ROHS, Reach, VDE, CQC, UL, IATF16949, ISO9001, ISO14001, ISO45001

As one of the leading high speed optocouplers suppliers in China, we warmly welcome you to buy discount high speed optocouplers from our factory. All customized products are with high quality and competitive price. For quotation and free sample, contact us now.