AS3492 DB REV 2.0

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Evaluation Boards- LED Drivers

AS3492 DB REV 2.0 is an evaluation board that was designed to be used as an LED driver board. The board enables boards to drive high-power LEDs, directly from the mains line voltage. By utilizing voltage feedback main loop control, the board will ensure an excellent light quality and output current accuracy, making it the perfect fit for any LED application.

Application Field

The AS3492 DB REV 2.0 has applications in automotive, AV, industrial, white goods and general lighting. Its primary use is for the driving of high power LEDs from the mains line voltage (which can range from 80V to 265V for some applications). It is also suitable for retrofit applications such as spot lights and table lamps. The board is tailored for automotive applications, and its current rating can range from 8 amps to a maximum of 40 amps for some applications.

Board Design and Working Principle

The board is built with several components such as a ferrite-core transformer and an IGBT power transistor. It operates in a buck topology that works on the basis of voltage feedback main loop control.

The board uses a digital current controller chip (AS3492) to drive the IGBT and control the LED current. This digital current controller chip was designed by AMBIENT Semiconductor and is capable of 1kHz to 1MHz frequency of operation. The chip has two operating modes: two-level zero-cross and single-level soft-turn on.

The board also employs energy saving techniques, such as frequency adaptation, pulse skipping and light-on dimming. The board uses PWM control to dim the light output, which ensures smooth transition from full brightness to dim brightness.

Features

The AS3492 DB REV 2.0 is equipped with several powerful features, such as:

• Input voltage range from 80V to 265V
• Output current range from 8A to 40A
• Frequency range from 1kHz to 1MHz
• Two operating modes: two-level zero-cross and single-level soft-turn on
• Pulse skipping & light-on dimming techniques to reduce energy consumption
• Switchable optical PWM frequency

Conclusion

The AS3492 DB REV 2.0 is an efficient LED driver board with powerful features. It is designed to drive high power LED\'s with excellent quality. The board utilizes voltage feedback main loop control to ensure an accurate output current. Furthermore, the board employs energy saving techniques like pulse skipping and light-on diming. The major use of this board is for automotive, AV, industrial and white goods applications.

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