SOP 4 DarlingtonTransistor

Features

High isolation 3750 VRMS

CTR flexibility available see order

Information

DC input with transistor output

Operating temperature range - 55 °C to 110 °C

REACH compliance

Halogen free

MSL class 1

Regulatory Approvals

UL - UL1577

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

CQC - GB4943.1, GB8898

CUL- CSA Component Acceptance

Service Notice No. 5A

Note 1. 100μs pulse, 100Hz frequency

Note 2. AC For 1 Minute, R.H. = 40 ~ 60%

Note 3. Fig.12&13

Note 4. Fig.14

Applications

Switch mode power supplies

Programmable controllers

Household appliances

Office equipment

In terms of performance, it can replace Everlight EL452, Liteon LTV352T, Ctmicro CT452, Sharp PC452,  Fairchild FODM352, Renesas PS2732-1/2733-1, Toshiba TLP187/127.

The CTR is 600-7500%, widely used in switch mode power supplies, smart meters, industrial control, measuring instruments, office equipment (copiers), household appliances (air conditioning, fans, water heaters).

SOP4 DarliangtonTransistor

Package Dimensions (Dimensions in mm unless otherwise stated)

Recommended Solder Mask (Dimensions in mm unless otherwise stated) 

1.The What type of optocoupler is TD352?

Darlington optocoupler

Apply to: Communications equipment, Programmable controller, Signal transmission, Industrial control, measuring instruments.

2.TD352 optocoupler characteristics?

Input-output isolation voltage (viso = 3750V MS)

Collector-emission breakdown voltage BV ≥350V

3.Darlington, the tube works?

The Darlington coupler is a common optoelectronic device consisting of two basic photodiode cascades. It is characterized by the input and output end of the resistance is larger than ordinary optocoupler, and has good electrical isolation and linearity.

4.OPTOCOUPLER selection guide and model recommendation?

1, Encapsulation type

Couplers can be classified according TO the type of package: coaxial, double in-line, TO package, flat package, patch package, and optical fiber transmission, this determines whether or not the optocoupler is available

2, Linear or nonlinear

The current transmission characteristic curve of nonlinear optocoupler is nonlinear, which is suitable for the transmission of switch signal but not for the transmission of analog signal, and the small signal time performance is good, can carry on the isolation control by the linear characteristic. For example, the commonly used optocoupler in switching power supply is linear optocoupler. If using nonlinear optocoupler, it is possible to make the oscillating wave bad, and when serious, parasitic oscillation occurs, so that the oscillating frequency of thousands of hertz is modulated by low frequency oscillations of tens to hundreds of hertz.

3, Current transfer ratio CTR

If different corresponding CTR is also different, and the data is also very different, in general, IF = 5MA, CTR value should be the same as the original optical coupling region CTR value, otherwise the product dynamic is very poor, in order to ensure the stability of the product feedback loop, it is necessary to select appropriate IF current so that the change of the input control current can be fed back to the output in time. In general, optocoupler current transmission than CTR is allowed in the range of 50% -200% . If CTR50% , then the LED in the lotus root will need a larger working current to drive, and even increase the power consumption of the circuit, and MCU I/O port can not provide too much current, if the CTR value is too large, in the start-up circuit or when a sudden change in load, there may be system instability, affecting the normal output. It should also be noted that for the same type of coupler will have different levels, which correspond to the CTR will be different.

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