LED Drivers and Backlighting

Our Electroluminescent (EL) drivers help cut costs and simplify designs for laptops, cellphone backlighting, consumer medical devices and wearables, and Internet of Things products.

Designed to support the rigorous requirements of the automotive industry, our high-brightness LED drivers offer advanced Pulse-Width Modulation (PWM) control capabilities such as fast transient response and very low susceptibility to noisy input transients.

To meet the specific requirements of applications ranging from RGB backlight to multiple-string white LED design, our backlight LED drivers optimize LED performance, efficiency and lifespan while minimizing the size of your design.

Targeting the most common requirements in for solid-state lighting and general illumination applications, our portfolio of general-purpose LED drivers includes high-voltage and high-brightness options.

Our sequential linear drivers can be used for long strings of low-cost, low-current LEDs that are created as solid-state replacements for fluorescent tubes, incandescent bulbs and CFL bulbs. Requiring just a single ceramic bypass capacitor, our linear current drivers simplify single- or multiple- channel designs.
 

Capable of driving one or two camera flash LEDs up to 1.5A, our camera flash LED drivers offer best-in-class efficiency and enhanced current accuracy  for portable battery-operated applications including smartphones, camera-phones, tablets, notebooks, and digital still and video cameras.

The HV96001 couples tightly to a secondary microcontroller (MCU) that is typically used for the protocol interface in LED lighting systems. It integrates key features for dimming control, power management and system protection. Its dimming features work with MCU-directed Pulse-Width Modulation (PWM) and analog dimming controls to achieve stable operation at 0.01% and lower. The boost controller stage minimizes the operating overhead to increase system efficiency while reducing inductor size. It also provides line frequency rejection with an input voltage range up to 60V. The PWM dimming uses a proprietary architecture to achieve stable dimming capability over an ultra-wide range (10,000:1+ at 400 Hz). Protection features include output overvoltage and undervoltage protection, overcurrent protection, load short circuit protection and stuck-at-zero detection of the DIM input signal.

To help you get started with your development, the Deep Dimming LED Evaluation Board  is fully assembled and tested to evaluate and demonstrate the features of the HV96001 LED driver. On the primary side of the board, a flyback converter is implemented as an active Power Factor Correction (PFC) controller in combination with a PIC^® MCU to provide a PF of > 0.9 for full input range. Supporting both linear and PWM dimming capability, the system’s PWM delivers an exceptionally wide dimming range of < 0.01%. The boost stage provides a higher voltage for the LED string with near-zero ripple for a flicker-free LED current. The load switch is used for PWM dimming with an ultra-wide duty cycle.