VKA4125N

VKA4125N is a type of general-purpose PWM regulator. It features a buck/boost converter, DC-DC switch and low power, making it well suited for use in a wide range of applications. It has been designed and manufactured to meet the needed pulse-width modulated (PWM) control requirements of a variety of consumer, industrial and military/avionic applications.

Application Field

Conventional industrial applications such as motor speed control, power supplies, voltage regulation, etc., or more specialized applications such as lighting systems, long-range communication networks, robotics, and HVAC, among others, all make use of VKA4125N.

VKA4125N is an ideal solution for high-power applications, its low-power consumption and efficiency rated at 97.8 percent make it especially suitable for those. This device also remains extremely reliable in a wide temperature range, making it a known solution for terrestrial and automotive applications.

Working Principle

VKA4125N is a variation of the buck converter, namely, asymptotically controlled inductor buck converter. It features an on/off switch between the input and the output of the converter, which results in a constant input voltage. The on/off interval needs to be adjusted in order to achieve the desired output voltage. This is accomplished by varying the frequency of the measurements taken by the control subsystem and the output of the feedback loop.

The output of the VKA4125N is of course determined by the control loop which depends on the input and output voltage measurements and the actual current through the switch. This combination of voltage and current measurements allows the device to work within a tight voltage regulation accuracy of 0.1% and to actuate change in the output voltage very quickly.