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AS1130-Slide7

Crossplexing allows the AS1130 to drive a high number of LEDs from the smallest available package. It allows driving up to 132 LEDs in a 12x11 matrix. Additionally each individual LED connected has an 8-bit PWM which allows 16 million colors using RGB. For brightness control fine adjustments such as white balance, each string’s current can be adjusted in 256 steps in between 0 to ~30 mA. Additionally, there is a global dimming control for the entire matrix. The AS1130 includes memory capable of storing up to thirty six frames which can be used as a buffer for displaying a lighting sequence or animation. The frame rate and how often an animation should be cycled are fully user adjustable. A two-direction scroll function is also implemented requiring no further processor control. For optimal efficiency a voltage feedback is available to connect to the feedback of the power supply for dynamic headroom control. For space sensitive applications a 6 mm² wafer level package is available. For prototyping or non-space sensitive applications the more easily handled SSOP-28 package is also available.

PTM Published on: 2012-01-18