UBA20270T/1,518

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The UBA20270T/1,518 is a Perfectly Matched Lighting (PML) controller module designed for use in LED lighting applications. It is a part of the PML controller family of products from ON Semiconductor, and is a ideal for applications such as LED drivers, LED ballasts and LED drivers. The UBA20270T/1,518 features protection from short-circuits, over-voltage and over-temperature, and is suitable for use in automotive, commercial and industrial lighting applications.

Features

• Integrated over-temperature, over-voltage and short-circuit protection.
• Input voltage range of 4.5V to 45V.
• Output voltage range of 8V to 37V.
• Inrush current control with adjustable peak current limit.
• Accurate output current limit with adjustable accuracy.
• Soft start capability.
• Thermal foldback current limit.
• Frequency dithering mode.
• Wide supply range for driving LED strings.
• High precision open LED detection.

Application Field

The UBA20270T/1,518 is a perfect match for LED lighting applications such as automotive, commercial, and industrial lighting. It is suitable for use in applications that require robust over-temperature, over-voltage and short-circuit protection, as well as soft-start and frequency dithering capabilities. It is also suitable for use in applications that require precise current limit accuracy and high precision open LED detection.

Its wide supply range allows it to drive a wide variety of LED strings, allowing it to be used in a variety of applications. It is also suitable for use in automotive applications, as it features reliability, robustness and accuracy.

Working Principle

The UBA20270T/1,518 uses an analog current controller to regulate the output current of the device. This analog current controller works in conjunction with a voltage dependent digital current control and a precision temperature dependent current limit. The analog controller is used to set the peak output current and the digital controller provides a feedback loop to ensure that the output current is kept in a range between the upper and lower limits. The precision temperature dependent current limit is used to set the current limit depending on the temperature of the device.

The UBA20270T/1,518 also features an integrated soft start and inrush current control, which allows the device to smoothly and safely start up in a controlled manner. The soft start feature also helps to minimize start up time and reduce the risk of damage to the connected LED strings. The inrush current control feature helps to limit the peak inrush current during start up and also helps to reduce the overall power consumption of the device.

The UBA20270T/1,518 also has an integrated open LED detection feature, which allows the device to detect open LEDs and shut down the output in order to protect the other LEDs in the circuit. This opens up the possibility for parallel LED string applications.

The UBA20270T/1,518 is a great solution for LED lighting applications that need reliable and accurate control and protection. Its integrated features provide protection from short-circuits, over-voltage and over-temperature, and also provide soft start and frequency dithering capabilities. Its wide supply range also allows it to be used in a variety of LED lighting applications.

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