Freescale offers a number of LED backlight solutions for all sizes of LCD panels. For medium and large size display panels, Freescale offers highly integrated, high performance devices that integrate power management and LED control into a single chip solution, with minimal external components. For larger panels >20", multi-chip systems can be used to drive the number of LEDs required. Freescale LED drivers can be used in many applications, such as notebook, monitor, TV, portable DVD, industrial, medical and instrumentation displays, as well as non display applications such as the emerging LED lighting segment. Solutions for white LED and RGB LED applications are available.

Freescale has a number of Power Management devices which integrate the LED backlight driver for cell phones and MID applications. The Power Management devices (PMIC) can be found in our power management section, Power Management Integrated Circuits.

Features

• Accurate current matching for improved uniformity eliminates the need for manual trimming and matching.
• Higher frequency PWM operation, up to 100kHz, eliminates audible noise, and visual artifacts such as flicker and waterfall noise.
• High speed drivers support wider dimming ranges up to 50,000:1 and improve dimming linearity.
• Dynamic headroom control (DHC) automatically adjusts the output voltage depending on the voltages across the LED strings.
• Integration of the boost FET in many applications reduces the BOM and system cost and enables more accurate current control and over current protection.
• Freescale's SMARTMOS technology provides drivers that support up to 60V output, driving more LEDs per device. As an example, the MC34844 supports up to 160 LEDs, or 25W backlight from a single chip.