AS3693A DEMOBOARD

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Evaluation Boards - LED Drivers

The AS3693A demo board is an example of an evaluation board. Developed by ams AG, it is a general-purpose LED driver suitable for a variety of applications, from automotive lighting to white backlight for LCD screens. The primary component of the board is the AS3693A IC, an advanced LED driver that embeds an audio processor and a power-saving dimming scheme. It offers a dimming range of 1:64, features low power consumption, comprehensive diagnostics support, and a wide input voltage range.

The AS3693A comes in a 3.3mm × 5.3mm WLCSP package and offers short-circuit, over-current, under-voltage, over-voltage, and open-circuit protection. It supports up to four strings of LEDs, each with up to 32 LEDs in series. It has a boost converter which is integrated with an enhanced dynamic headroom controller. It is designed to be extremely efficient and can reduce up to 97.5% of the diode forward voltage drop.

The AS3693A demo board showcases all the features of the AS3693A LED driver IC. It also demonstrates the ON/OFF and fade-in/fade-out dimming capability. The board contains the AS3693A, a spark gap controller, dc input, and six LEDs. The board is designed to be used in the industrial applications such as large floor lamps, residential outdoor lighting, and decorative landscape lighting.

The working principle of the AS3693A demo board is simple yet effective. The demo board contains separate capacitors and voltage dividers for each of the four LED strings, so that each string can be individually controlled. It is connected to a dc power source such as a battery and provides a current to the LEDs. The spark gap controller guards against over-voltage and under-voltage conditions. The current is adjusted by the AS3693A which is programmed to provide a maximum of 1:64 dimming. The board operates in a boost converter mode, which means that it will boost the voltage up to a certain level, and then decrease the level depending on the dimming required.

The AS3693 demo board enables users to evaluate the performance of the AS3693A IC. Users can use the board to measure the parameters of the IC, including the die temperature, the current output, and the maximum current. The power-saving mode can be enabled, which can greatly reduce power consumption. The AS3693 demo board can also be used to review the PWM dimming performance of the IC, as well as to evaluate any audio processing features.

In conclusion, the AS3693A demo board is a powerful evaluation board that enables engineers to take advantage of all the features of the AS3693A IC, from dimming range to audio processing. It is an indispensable tool for any LED project, especially for those looking for efficiency and compactness.

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