AS3682/83 EVALUATION BOARD HFL

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AS3682/83 EVALUATION BOARD HFL is an advanced active matrix backlight driver IC. This Evaluation Board HFL is used to design and evaluate active matrix display systems for large LCD panels, with high accuracy lighting performance.

AS3682/83 EVALUATION BOARD HFL provides three channels of current control with independent levels, allowing drive capability up to 2000mA per channel without the need for additional control devices. Because of its independence and flexibility, AS3682/83 can be used in both LCD backlight and LED driving applications.

Application Field:

AS3682/83 EVALUATION BOARD HFL can be used in various applications, such as automotive displays, industrial displays, LCD TVs and consumer products. It is perfect for applications that require LED illumination and strict brightness control. In consumer products, applications are increasing for LED backlighting with stringent current compliance and low cost.

Working Principle:

AS3682/83 EVALUATION BOARD HFL incorporates a patented advanced Digital Dimming (DD) technology. The dimming algorithm is based on detecting the PWM duty cycle, and automatically scale the current level with respect to input duty cycle. This dynamic scaling allows for a smooth ramp up and down of the brightness with minimum variation in the lighting output. The DD algorithm ensures accurate, dynamic (real-time) and rapid dimming response. It supports a wide range of duty cycles and even very low duty cycles. In addition, the DD algorithm is fully configurable, allowing flexibility and customization.

The AS3682/83 EVALUATION BOARD HFL also has two programmable soft start features. The first is an LED soft start, which limits the LED current until the LED reaches an acceptable brightness level, and the second is a power soft start, which limits the power consumption while the LED is ramping up.

The AS3682/83 EVALUATION BOARD HFL is ideal for high power applications where high accuracy dimming is required. It can provide up to 6A current, depending on the number of channels used in the configuration. The HFL also supports multiple current control modes, such as on/off, PWM and constant current control, for applications that require a wide range of dimming flexibility.

Conclusion:

AS3682/83 EVALUATION BOARD HFL is an advanced active matrix backlight driver IC. It is used to design and evaluate active matrix display systems for large LCD panels, with high accuracy lighting performance. The HFL provides three channels of current control with independent levels, allowing drive capability up to 2000mA per channel without the need for additional control devices. This evaluation board is perfect for applications that require LED illumination and strict brightness control, such as automotive displays, industrial displays, LCD TVs and consumer products.

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