SOP 5 Optocoupler

High isolation 3750 VRMS

DC input with high speed transistor

Operating temperature range - 40 °C to 100 °C

REACH compliance

Halogen free

MSL class 1

Regulatory Approvals

UL - UL1577 (Pending Approved)

VDE - EN60747-5-5(VDE0884-5)

CQC – GB4943.1, GB8898

Line receivers

Telecommunication equipment

Out interface to CMOS-LSTTL-TTL

Wide bandwidth analog coupling

Pulse transformer replacement

Computer-peripheral interface

TDM501 is a small volume SOP5 high-speed optocoupler with a speed of 1 Mbit/s, an input current of 25 ma, an output voltage of -0.5-30 V, a withstand voltage of 3750 vrms, and a volume of 4.4 * 3.6 * 2.0 mm, lTV-M501, CTM453, sharp pc457lon. Toshiba TLP2309, TLP109, Anwar Ibrahim High HCPL-M45343U, Anwar Ibrahim High HCPL-K54L, Fairchild FODM453, package type for patch, iPM interfaces for AC and DC brushless motor drives, industrial converters, air conditioners, renewable energy converters, sewing machines and switching power supplies, as well as for gate drive applications and general digital isolation.

SOP 5 optocoupler 1Mbit/s High Speed Transistor Photo Coupler

Package Dimensions (Dimensions in mm unless otherwise stated)

Recommended Solder Mask (Dimensions in mm unless otherwise stated) 

1.What is the difference between high-speed and ordinary optocouplers?

The difference between high-speed optocoupler and ordinary optocoupler mainly lies in the structure and transmission speed. The structure of high-speed optocoupler is photodiode + amplifier driving circuit, while the structure of ordinary optocoupler is photodiode + amplifier driving circuit. High-speed optocoupler is widely used in digital circuits because of its high transmission speed and high-speed data transmission. Ordinary coupler is mainly used in low-voltage situation, its transmission speed is slow. In addition, the current transfer ratio and CTR-IF characteristic curve of high-speed optocoupler are different from those of ordinary optocoupler.

2.How to see if the coupler is a high-speed coupler?

The structure of high-speed optocoupler is different from that of ordinary optocoupler. The structure of high-speed optocoupler is photodiode + amplifier driving circuit, while the structure of ordinary optocoupler is photodiode + amplifier driving circuit. The response speed of high-speed optocouplers is faster, reaching the nanosecond level, while the response speed of ordinary optocouplers is microsecond level. In general, high-speed coupler transmission rate is relatively high, the common high-speed coupler models are 100K bit/s and 1m bit/s, etc. . Common high-speed coupler models on the market include TDM501, TDM601,6N136,6N137, TD6N139, etc.

3.What are the principles of high-speed optical coupling?

TD501 high-speed optical coupling is a semiconductor type of optoelectronic device that packs light emitting device and photosensitive device in the same shell and transmits electrical signals through electric conversion. Among them, the light-emitting devices are generally the light-emitting diodes. There are many kinds of photosensitive devices, in addition to photodiodes, there are photosensitive triodes, photoresistors, photoelectric thyristor, etc. High-speed optocouplers can be combined by different kinds of light-emitting devices and photosensitive devices according to different requirements. The comparator A1 compares the reference voltage of ZDl (junction A) with the output voltage through the different voltage distribution circuits R7 and R8, thereby controlling the conduction state of Q2 and defining the current of the light emitting diode D1 and the collector current coupled by light to the photosensitive transistor Q1. Q1 then defines the pulse width and the output voltage, compensating for any propensity to change the output voltage. With the increasing use time of the optocoupler and the decreasing transmission ratio or gain, it is necessary to provide sufficient driving current margin to Q2 in order to prevent control failure. There are many kinds of photoelectric couplers, including photoelectric diode type, photoelectric triode type, photosensitive resistance type, optical control thyristor type, photoelectric Darlington type, integrated circuit type and so on.(The shape of the metal round shell packaging, plastic seal double row straight inser.

4.Third, the application of high-speed optical coupling in signal control?

The elevator control panel, motor drive control and brake control are the application range of optical coupling, which can use TD817, TD814, TD501, CNY 17-3,6N136 and other series of optical coupling. Optical coupling can constitute all kinds of logic circuit, due to the interference performance of photoelectric coupler and isolation performance is better than the transistor, therefore, composed of its logic circuit more reliable, in the switch circuit, often require control circuit and switch to have a good electrical isolation, for general electronic switch is difficult to do, but with photoelectric coupler is easy to achieve. Due to the wide variety of optical coupling, unique structure, outstanding advantages, unidirectional signal transmission, the input terminal and the output terminal fully realize the electrical isolation, the output signal has no impact on the input terminal, strong anti-interference ability, stable work, no contact, long service life, high transmission efficiency, so its application is widely used. TD817 optical coupling application multi-function gateway device. Consider the response speed of optical coupling in the transmission of digital quantity. When the optical coupler isolthe digital signal for control system design, the transmission characteristics of the photoelectric coupler, namely the transmission speed, usually becomes the determining factor of the large data transmission rate of the system. In many bus industrial measurement and control systems, in order to prevent mutual interference between modules, but also not to reduce the communication wave rate, we must use high-speed optical couplers to achieve mutual isolation between modules. The commonly used high-speed optical couplers include 6N135,6N136,6N137, TD501, and TD601. It is described here to improve the switching speed of the normal optical coupler. Due to the distributed capacitance of the photocoupler itself, the transmission speed is affected, and the distributed capacitor CBE and CCE exist inside the photosensitive triode. Because the photoelectric coupler is relatively low, the load resistance of the collector cannot be too small, otherwise the swing of the output voltage is limited. However, the load resistance should not be too large, and the larger the load resistor RL is, due to the presence of the distributed capacitance, the worse the frequency characteristics of the photoelectric coupler is, and the longer the transmission delay is. Using 2 photocouplers T1, T2 is connected to a complementary push-pull circuit, and the photocoupler can be improved. When the pulse rises to "1", connect T1 and T2. Instead, when the pulse is a "0" level, T1 is turned on and T2 is turned off. This frequency characteristic of this complementary push-pull circuit greatly outperforms that of a single photocoupler.

5.What is the role of high-speed photocoupling in the charging pile?

(1) The charging pile (bolt) can realize timing, power calculation and amount charging, and can be used as the public power purchase terminal. At the same time, in order to improve the efficiency and practicability of the public charging pile (bolt), the function of multiple charging (bolt) and charging the electric bicycle will be added in the future. The model and parameters of photocoupler must be selected correctly in the design of photocoupling photoelectric isolation circuit. The selection principles are as follows:

Because the photoelectric coupler is a unidirectional signal transmission device, and the data transmission in the circuit is bidirectional, the size of the circuit board is certain, combined with the actual requirements of the circuit design, it is necessary to choose a single chip integrated multi-channel optical coupling device;

(2) The allowable range of the current transmission ratio (CTR) of the optical coupler is not less than 500%. Because when CTR & lt; 500%, the LED in optical coupling needs a large working current (& gt; 5.0 mA) to ensure that the signal does not make mistakes in the long line transmission, which will increase the power consumption of optical coupling;

(3) The transmission speed of optocoupler is also one of the principles that must be followed when selecting optocoupler. The speed of optocoupler switch is too slow to respond correctly to the input level, which will affect the normal work of the circuit.

(4) Linear optical coupling is recommended. Its characteristic is that the CTR value can be adjusted linearly in a certain range. In the design, because the circuit input and output is a high and low level signal, so the circuit works in a nonlinear state. In linear applications, because the signal is really transmitted, the appropriate static working point should be set according to the requirements of dynamic work, so that the circuit works in a linear state.

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