ShenZhen Royalighting Technology Co., Ltd

 

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

 

ABSOLUTE MAXIMUM RATINGS
PARAMETER	SYMBOL	VALUE	UNIT	NOTE
INPUT
Forward Current	IF	60	mA	Â
Peak Forward Current	IFP	1	A	1
Reverse Voltage	VR	6	V	Â
Input Power Dissipation	PI	100	mW	Â
OUTPUT
Collector - Emitter Voltage	VCEO	80	V	Â
Emitter - Collector Voltage	VECO	6	V	Â
Collector Current	IC	50	mA	Â
Output Power Dissipation	PO	150	mW	Â
COMMON
Total Power Dissipation	Ptot	200	mW	Â
Isolation Voltage	Viso	3750	Vrms	2
Operating Temperature	Topr	-55~110	°C	Â
Storage Temperature	Tstg	-55~125	°C	Â
Soldering Temperature	Tsol	260	°C	Â

 

ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25°C
PARAMETER		SYMBOL	MIN	TYP.	MAX.	UNIT	TEST CONDITION	NOTE
INPUT
Forward Voltage		VF	-	1.24	1.4	V	IF=10mA	Â
Reverse Current		IR	-	-	10	μA	VR=6V	Â
Input Capacitance		Cin	-	10	-	pF	V=0, f=1kHz	Â
OUTPUT
Collector Dark Current		ICEO	-	-	100	nA	VCE=20V, IF=0	Â
Collector-Emitter Breakdown Voltage		BVCEO	80	-	-	V	IC=0. 1mA, IF=0	Â
Emitter-Collector Breakdown Voltage		BVECO	6	-	-	V	IE=0. 1mA, IF=0	Â
TRANSFER CHARACTERISTICS
Current Transfer Ratio	TD356	CTR	50	-	600	%	IF=5mA, VCE=5V	Â
	TD356A		80	-	160			Â
	TD356B		130	-	260			Â
	TD356C		200	-	400			Â
	TD356D		300	-	600			Â
	TD356E		100	-	200			Â
Collector-Emitter Saturation Voltage		VCE(sat)	-	0.06	0.2	V	IF=20mA, IC=1mA	Â
Isolation Resistance		RISO	10^12	10^14	-	Ω	DC500V, 40 ~ 60% R.H.	Â
Floating Capacitance		CIO	-	0.4	1	pF	V=0, f=1MHz	Â
Response Time (Rise)		tr	-	3	18	μs	VCE=2V, IC=2mA RL=100Ω	3
Response Time (Fall)		tf	-	4	18	μs		3
Cut-off Frequency		fc	-	80	-	kHz	VCE=2V, IC=2mA RL=100Ω ,-3dB	4

 

 

Applications

Switch mode power supplies

Programmable controllers

Household appliances

Office equipment

 

 

In terms of performance, it can replace Everlight EL357, Liteon LTV-356/357, Ctmicro CT357, Sharp PC356/357, Cosmo KPC357, Fairchild HMA2701, Renesas PS2711-1/2732-1, Toshiba TLP124/127.

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).

 

 

SOP 4 Transistor Optocoupler

Package Dimensions (Dimensions in mm unless otherwise stated)

 

Recommended Solder Mask (Dimensions in mm unless otherwise stated) 

 

 

 

 

 

 

 

 

1. The TD356 optocoupler for what field?

1. Industrial Control: 356 optical rotation plays a vital role in the field of industrial control. It can effectively isolate the power supply, prevent electrical noise disturbance, to ensure the stable operation of the control system.

2. Communication equipment: in communication equipment, 356 optical conversion is used to protect sensitive components from electromagnetic interference and improve communication quality.

3. Automotive Electronics: automotive electronics systems require high levels of stability and safety. 356 light can effectively suppress electromagnetic interference.

 

2. Why optical couplers are so anti-jamming?

1, Electrical isolation

The optocoupler provides complete electrical isolation between the input and output sides of the circuit. Such isolation is essential for applications that are critical to safety and to the prevention of interference, such as medical and industrial equipment.

2, Immunity

Electronic circuits can be noisy places with various sources of interference. The optical coupler acts as a shield, preventing noise from spreading between circuits and ensuring Signal integrity

3, Voltage compatibility

The optocoupler can be adapted to different voltage levels on the input and output sides. This versatility makes them suitable for a wide range of applications.

4, Current isolation

The current isolation achieved by the optocoupler prevents DC from occurring between the circuits. This is essential to prevent earthing loops and to maintain circuit integrity.

In the field of electronics, precision, reliability and security are not to be ignored, optical coupler as an anti-interference artifact and shine. These unobtrusive components provide electrical isolation, noise resistance, and voltage compatibility, making them indispensable for applications ranging from medical devices to industrial automation. When choosing a optocoupler, consider factors such as speed, isolation voltage, and type of package to ensure seamless integration into your circuit design.

 

3. What are the optical coupling and cooling measures availabl?

Choose the optical coupling with low thermal resistance: choosing the optical coupling with low thermal resistance can reduce the temperature increase of the optical coupling in the working process. Thermal resistance is a parameter representing heat dissipation performance and is usually expressed by θ JA or θ JC.θ JA represents the thermal resistance of junction to ambient, and θ JC represents that of junction to case. The lower the thermal resistance, the better the heat dissipation performance of photocoupling. Using a radiator: adding a radiator for the optical coupling is an effective way to improve the heat dissipation effect. The radiator can quickly transmit the heat of the optical coupling to the surrounding environment. There are many kinds of radiator, such as aluminum radiator, fan radiator, etc. When selecting the radiator, it is necessary to choose according to the power consumption, working environment and other factors. Optimize the layout and wiring: in the circuit design, the optical coupling should be placed in a position easy to heat dissipation, to avoid the accumulation of excessive components. At the same time, the wiring should be optimized to reduce the loss and interference in the signal transmission process. Increase the air circulation: maintain the circulation of the air around the light coupling, which can improve the heat dissipation effect. Air circulation can be improved by adding air vents, fans and other measures. Use of thermal conductive materials: between the optical coupling and the radiator, between the optical coupling and the circuit board, the thermal conductive adhesive, the thermal conductive pad and other thermal conductive materials can be used to improve the heat conduction efficiency. Limit working current: Reducing the.

 

4. How to improve the photocoupled air circulation to enhance the heat dissipation?

Improving photocoupled air circulation to enhance heat dissipation can be achieved in several ways:

Add vents: Add vents to the equipment or cabinet where the optical coupling is located to improve air circulation. The vents shall be set at the top and bottom of the equipment as far as possible to form convection. At the same time, avoid piling up goods near the vents to ensure smooth air circulation. Install fan: Install fans inside the equipment to enhance air circulation. The installation position of the fan should be as close as possible to improve the heat dissipation effect. At the same time, the running state of the fan should be checked regularly to ensure its normal operation. Use heat conduction fan: heat conduction fan is a kind of fan with heat dissipation function, it can quickly take away the heat of light coupling in the process of work, improve the heat dissipation effect. When selecting heat conduction fan, it should be made according to the power.

 

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