BROADCHIP Introduces SPI Protocol to Control 16-Channel Constant Current LED Driver

BROADCHIP (Guangxin Electronic Technology Co., Ltd.) recently launched the portable product market--BCT3288. This model uses the SPI protocol to control the 16-channel constant current LED driver. Each channel 64-level constant current output is convenient and controllable, giving mobile phones, digital photo frames, Portable products such as notebooks and small household appliances bring the effect of colorful LED lights, which complements the gap in the industry market. This further expands Broadchip's LED driver product lineup.

“As consumers increasingly demand the appearance of portable products such as mobile phones, the current industry is generally a multi-channel unified current level LED driver output. This common LED effect similar to the marquee function is not attractive. On this basis, Guangxin Electronics has completely defined a new effect of the colorful light drive solution.” CTOJerry Dai of Guangxin Electronic Technology Co., Ltd. stated that “BCT3288 is very suitable for white and color LED applications because there are 16 output channels. Each channel can support up to 40mA output capability, each channel can have 64 different levels of current output. The SPI protocol can determine any current output of any channel, which provides great flexibility for LED output and can demonstrate a lot of Colorful effects, such as: horse racing, breathing, comet smear and other product designers can imagine the LED effect."

The BCT3288 has 16 independent high-precision current sources. Each current source has a current sinking capacity of 40mA. The peripheral hardware circuit of the LED driver is simple. Only one filter capacitor and one resistor for setting the current are required. The maximum drive current capability of each channel is external. The resistor is set. The operating voltage range is 2.7~5.5V, and the VIH is 0.6VDD, so it can be well applied to the 2.8V VIO mobile phone platform.

The BCT3288 is a pollution-free, lead-free, environmentally friendly product with an extended industrial temperature range of -40°C to +85°C and is available in a QFN-24 (4mm × 4mm) package.

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