VE-J2T-EZ

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The VE-J2T-EZ power component from Murata Power Solutions is a DC DC converter. This off-line primary-side controller is the ideal component for isolated power supplies specially designed for LED driver applications. Its features make it ideal for applications where a secondary isolated output is needed along with a high-efficiency and compact design. This article will discuss the application field and working principle of the VE-J2T-EZ, in relation to a DC DC converter.

The VE-J2T-EZ provides a continuous output current up to 700mA, under an input voltage range of 85V to 264V. It is designed to comply with industrial standard safety regulations and has built-in protection against short circuit, over-temperature, over-voltage, and over-current conditions. The high power density of the device makes it suitable for applications that require a low-profile form factor. Additionally, it is designed to operate in a temperature range of 0°C to 70°C and can be used in ambient temperatures up to 40°C.

The VE-J2T-EZ DC DC converter is designed for LED driver applications. It offers fixed frequency operation at 100kHz, allowing for an efficient design. Additionally, its internal soft start feature helps reduce inrush current and prevents current surge at start-up. The device is also equipped with internal synchronous rectifier control, allowing for frequencies of up to 300kHz, and low ripple and noise. Additionally, it supports a wide range of LED dimming methods, providing precise LED dimming control.

The working principle of the VE-J2T-EZ is based on primary-side constant current control. This type of control eliminates the need for an opto-coupler or voltage-sensing element, allowing for a reduced number of passive components, and a simplified circuitry. The device employs an internal high-side power switch, followed by an active power factor correction (PFC) stage. This PFC stage is capable of achieving a power factor up to 0.9, providing for a more efficient power supply design. Following the PFC stage, an output rectifier is employed, in order to achieve an isolated DC output voltage.

In conclusion, the VE-J2T-EZ from Murata Power Solutions is a DC DC converter designed for LED driver applications. Its features and performance make it ideal for LED lighting applications that require an isolated output in order to achieve high efficiency. The device employs primary-side constant current control, in order to provide a more efficient and simplified design, and it is capable of achieving advanced lighting dimming requirements. Additionally, an active PFC is employed in order to achieve power factors up to 0.9, and its internal synchronous rectifier makes it possible to reach frequencies up to 300kHz.

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