New LED driver with dynamic headroom control in the US
National Semiconductor has introduced the LM3492 LED driver with dynamic headroom control to efficiently control the brightness of the two sets of lamps and ensure that the drive currents of the two sets of lamps are exactly the same. At the same time, it can greatly improve system efficiency, simplify circuit design, and reduce system cost. It belongs to National Semiconductor's PowerWise high energy efficiency chip series.
The LM3492 chip has dynamic headroom control function, which can flexibly adjust the LED power supply by using the feedback voltage of the boost converter to achieve the lowest power consumption, so that the system can achieve the highest efficiency. Monitors of different sizes can be driven by a variety of different sizes of monitors using the LM3492 chip with dynamic headroom control. It is an ideal driver for automotive LCD backlight systems.
At the same time, this driver has three MOSFETs built in, which simplifies circuit design and reduces system cost. The chip has a built-in boost converter and a dual-channel current regulator that can drive two sets of LEDs and independently adjust its brightness. The output power can be up to 15W, the output voltage is up to 65V, and it has high efficiency and cost. benefit.
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