Development of 7X17 Dot Matrix LED Driver IC by ROHM
By now, many of us have seen an application of LED in one form or another, whether being the general lighting application or use in sterilization application. But the newly developed dot matrix LED driver IC by ROHM gives a new life to our generally doll looking white goods or even mobile devices. The newly developed dot matrix LED driver IC BD26502GUL integrates a 7ch PMOS high side switch, 17ch constant current circuit, 1/7 time division circuit, as well as pattern generator, all on a single chip, resulting in an easily configurable colorful information display and illumination devices, ideal for use in mobile phones, digital appliances and other type of electronic equipment utilizing monochromatic displays and illumination functions.
The 1/7 time division circuit and pattern generator in this newly developed LED driver IC provide a maximum of 7 x 17 dots LED display without any needs for microcontroller. Furthermore, a built-in 13-pattern generator with slope functions significantly reduces the load on microcontroller. The new Driver IC comes in a WL-CSP package, only 0.55mm thick, similar to the thickness of many of the peripheral components such as capacitors an resistors, making it ideal for compact devices such as mobile phones as well as compact LED matrix modules. The new driver IC requires only one external resistor for setting the maximum current, resulting in a smaller board size and a simpler design. Among some of the features on this driver IC are; 8-way scroll function dot scroll function, brightness control for individual ON/OFF control via 16-step DAC (0-20mA) PWM control (64-step) and capability of displaying 39-dot full-color display when using RGB LEDs to name a few.