LYT4224E

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Part Status:	Obsolete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):	22W
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-7C
Mounting Type:	Through Hole

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LYT4224E is a highly integrated power management unit (PMU) offering power conversion, system power regulation and parts of system protection. It is categorized as a PMIC AC DC converters (Offline Switches) and designed to provide high power system solutions for a wide range of applications.The LYT4224E features a low component count and fast transient response time, allowing for rapid system wake-up and improved system performance. It integrates various circuits, including an on-board start-up and shut-down circuit, Buck DC-to-DC converters, and many other functionalities. Its main benefits include low component count, high efficiency, low noise and high power density.The main application fields of the LYT4224E are consumer electronics, medical technology, industrial automation and sensor technology. It can be used as a direct power supply system or as an offline switching power supply system.The LYT4224E is a voltage mode controller and can deliver output powers up to 3A, 100 watts, and an efficiency level that can reach 92%. The device includes a Buck regulator operating at a maximum frequency of 500kHz, an inductor size of 1mh and a switching frequency of 300kHz, allowing for higher efficiency and improved performance. In its start-up operation mode, the LYT4224E has an on-board start-up and shut-down circuit, allowing it to start and shut down itself. This circuit can be adjusted to provide a fast start-up time of 1.2ms and a fast shut-down time of 1ms. During its shut-down mode, it can automatically reduce the system power consumption to 0.1W and maintain a stable voltage output. The LYT4224E works in accordance with the following steps: Firstly, an external voltage is applied to the device. Then, the start-up circuit will initiate the powered On/Off sequence, which starts the Buck converter and allows it to take over the Buck switching frequency. Once it is activated, the Buck converter will start to generate a constant voltage output to power the system. When the system enters the shut-down mode, the start-up and shut-down circuit will reduce the power consumption to 0.1W, while maintaining a stable voltage output. The LYT4224E integrates other protective functions, such as short-circuit, overvoltage and undervoltage protection, input voltage and output voltage monitoring, and thermal protection. These features make it an ideal solution for a variety of applications, such as automotive, industrial, consumer electronics and medical. In conclusion, the LYT4224E is a highly integrated power management unit offering power conversion, system power regulation and parts of system protection. It is categorized as a PMIC AC DC converters (Offline Switchers) and designed to provide high power system solutions for a wide range of applications. The main features of the LYT4224E include low component count, high efficiency, low noise and high power density. It is an ideal solution for automotive, industrial, consumer electronics and medical applications.

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