Multi-channel mini LED driver adds depth to digital signage

Leveraging MagnaChip’s experience with Blu LED drivers in the television set market, the company has developed multi-channel mini LED drivers for the digital signage market.

Digital signage display sizes can range up to several hundred inches, which requires a much higher level of technology and reliability than found in television sets, concedes MagnaChip. For LED panels used in digital signage, about 1,000 LEDs per square meter are used. The capability of the LED driver must be doubled or even tripled for the most cost-effective scenario, advises MagnaChip. For example, compared with existing LED drivers in the market capable of controlling 12-channel or 16-channel LEDs, MagnaChip’s mini LED driver is able to drive 36-channel LEDs concurrently, featuring high density, reduced energy consumption and more efficient product designs.

The LED driver uses 12-bit grayscale pulse width modulation (PWM) to enable the 4,000-step PWM control and LED current control. It also provides 64-step output current control, which enables detailed graphic representation, as well as accurate depictions of a variety of pictures and images according to the brightness of the contents.

Furthermore, the mini LED driver has a high level of security with a high withstanding voltage of 65V for surge protection – this is a key requirement in LED signage, says MagnaChip. For LED control and higher reliability, MagnaChip uses a 64-pin QFN package measuring 8.0 x 8.0mm2, claimed to deliver “excellent thermal performance”.

MagnaChip Semiconductor is a designer and manufacturer of analogue and mixed-signal semiconductors for communications, IoT, consumer, industrial and automotive applications. The company’s standard products group and foundry services group provide a range of standard products and manufacturing services to customers worldwide. MagnaChip owns a portfolio of approximately 3,100 registered patents and pending applications, and has extensive engineering, design and manufacturing process expertise.

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