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Optoelectronics/Displays  

Step-down LED drivers geared for TV LED backlight

Posted: 11 Feb 2015     Print Version  Bookmark and Share

Keywords:MagnaChip Semiconductor  LED driver  TV backlight  MOSFET 

MagnaChip Semiconductor Corp. has unleashed a couple of step-down LED drivers aimed at TV LED backlight and LED lighting applications. The backlight drivers are designated as MAP3511 featuring single channel and MAP3512 featuring dual channels.

The MAP3511 and MAP3512 drivers claims to replace the existing step-up power circuit method of LED TV backlighting with a step-down circuit. These solutions enable the optimisation of TV backlight power circuits by reducing system cost, such as eliminating the need for additional external MOSFETs for dimming control, and increasing system efficiency, noted the company. The products have multiple embedded protection circuits preventing functional errors during LED operation. This also enhances TV image quality and performance. In addition, a dimming function adjusts TV brightness and supports both PWM signal and analogue dimming control signals, making it usable in a range of TV applications from low-end TV backlighting to premium ultra-high-definition (UHD), added MagnaChip.

The MAP3511 (single channel) features: 8.5V to 18V input voltage range, average-mode current control, programmable constant off-time, up to 3V analogue dimming input, direct PWM dimming input, ±1 per cent current sense voltage accuracy, fault output (MOSFET drain-source short), short circuit protection and is offered in an 8-lead SOIC package, halogen-free.

The MAP3512 (dual channel) features mostly the same capabilities as the single channel device. It simply adds over-duty protection and is available in 16-lead SOIC package, halogen-free.





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