LYT4317L

Series:	LYTSwitch™-4
Packaging:	Tube
Part Status:	Obsolete
Output Isolation:	Isolated
Internal Switch(s):	Yes
Voltage - Breakdown:	725V
Topology:	Flyback, Step-Down (Buck), Step-Up (Boost)
Voltage - Supply (Vcc/Vdd):	--
Duty Cycle:	99.9%
Frequency - Switching:	140kHz
Power (Watts):	50W
Fault Protection:	--
Control Features:	--
Operating Temperature:	-40°C ~ 150°C (TJ)
Package / Case:	7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Supplier Device Package:	eSIP-7F
Mounting Type:	Through Hole

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Introduction

LYT4317L is an offline AC-DC triple output converter module. It has high efficiency as well as it complies with the latest international environmental regulations and standards like ITE, IEC/EN/UL60950 and meets the electronic industry needs. It is an ideal solution and can be used in various applications such as home appliances, office equipments, industrial automation, and more.

Application Field

LYT4317L can be used as an AC-DC and DC-DC power switch for various applications in industrial control, medical electronics and home appliance etc. As an AC-DC power switch, it is capable of automatic restoring, high conversion efficiency and wide output voltage. For the DC-DC power switch, it provides high efficiency, low operating temperature and fast response speed. In terms of home appliance, LYT4317L can be used in air conditioners, water heater, washing machine, refrigerator and more as an AC-DC power switch. In terms of industrial control and medical electronics application, LYT4317L can provide stable output power to drive the motor or high requirements products. It is also equipped with over power, surge protection and other safety characteristics, making it an ideal choice of high power switch solution.

Working principle

The core components of LYT4317L are two voltage converter circuits, one for AC-DC conversion, another for DC-DC conversion. For the AC-DC conversion circuit, the LYT4317L adopts a bridge rectifier circuit consisting of four power diodes. This type of rectifier circuit extracts a constant DC voltage from the AC input on the primary side of the transformer. Both the AC input and DC output voltages of the transformer can be regulated within the proper ranges for different applications. For the DC-DC conversion circuit, it uses a step-down switching regulator. This regulator includes a switching MOSFET, an inductor, two capacitors and a control IC. The switching MOSFET acts as the switch between the input and output of the regulator, allowing to switch the input voltage to the output with a relatively high frequency. By controlling the duty cycle of the MOSFET, the output voltage and current can be regulated in the proper ranges with a high efficiency.

Conclusion

LYT4317L is an advanced AC-DC and DC-DC power switch module. It can be used in various applications such as home appliance, industrial control, medical electronics, and so on. Its working principle combines bridge rectifier circuit and step-down switching regulator, which allow the LYT4317L to have high efficiency and keeping the output voltage in the proper range with fast response speed and high conversion efficiency.

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