ON Semiconductor, the premier supplier of high-performance silicon solutions for energy-efficient electronics, introduces the 6-channel, energy-efficient Quad-Mode LED driver, the CAT3649, for the latest smartphones and other consumer handheld applications such as digital cameras and portable media playback (PMP). This Quad-Mode architecture with Content Adaptive Brightness Control (CABC) ensures market-leading energy efficiency for LED backlight applications that use only external capacitors.
Anthony Russell, director of LED power products at ON Semiconductor, said: "Consumer products such as smartphones use larger screens, so the battery requirements are higher, and the battery needs to be used longer after each charge. Charging. The CAT3649 combines energy efficiency, pulse width modulation (PWM) dimming, CABC and filtering to be truly unique in the industry."
The energy-efficient LED driver CAT3649 offers a total of four charge pump modes (1x, 1.33x, 1.5x and 2x) instead of the conventional 3-mode; making it stand out in the market. Compared to traditional charge pump LED drivers that operate 1.5 times, the CAT3649's 1.33x mode boosts energy efficiency by up to 10%, enabling handheld devices with this device to significantly extend battery life. This Quad-Mode fractional charge pump supports a wide input voltage range from 2.4 V to 5.5 V. The LED current can be adjusted in 32 linear increments of analog dimming via a 1-wire interface, or it can be further adjusted by PWM. The PWM dimming control is compatible with the CABC function at PWM signal frequencies from 100 Hz to 200 kHz.
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