Renesas rated current drain type LED driver (Figure)

Renesas Technology Corp released the M66506FP 32 output constant flow mode LED driver, with the industry's first can be set on the basis of the output of the 16 sets of current dual function for large LED display. The same 16 output product package size M66506FP and Renesas technology at present, it can provide 32 output, and lower power consumption and has a variety of functions, the system installation area is reduced by half, simplify the system design. The application of large screen display in public facilities and street advertising LED display is growing. In order to provide high resolution color image display, the LED driver is required to provide more than 16 of the current standard output and provide complex functionality. To meet the needs of the market, Renesas technology has developed a M66506FP small, 32 output LED driver IC, based on the previous use of LED drive technology. M66506FP provides the following properties.

(1) the industry's first 32 output LED driver allows setting current based on 16 output on the road. Due to the use of 0.5 m BiC-DMOS*1 process, so that the number of drive output increased from 16 to 32. The output current can be set in the range of mA for the first time in 10 MA100, realize the dual function set based on 16 separate current output in the two industry, so using a drive integrated circuit, respectively set the color LED drive possible. M66506FP uses a power SSOP*2 package, the same size as Renesas's current model, reducing the installation area by half.

(2) power consumption is reduced about 75%, higher resolution. The output element from the bipolar cell need base current, variable voltage driven DMOS device does not need the base current, power consumption can be in the pre driver stage and constant current setting circuit in the lower; compared with the model of Renesas technology at present, idle time power consumption is reduced by approximately 75%. In the temperature and voltage fluctuations, maintaining stable output characteristics, providing high quality LED display.

(3) due to the improvement of function provides an on-chip 6 bit D/A converter, in addition to the use of an external resistor to the output current value of the previous control, can also be controlled 64 level current adjustment. At each output also increased open / short circuit detection function. If the LED drive voltage value is abnormal due to a LED exception or failure, the value is compared with the set voltage value and an error signal is output. On the open circuit voltage detection function, can be set in the range of V 02.5, 32 set. Short circuit detection function, there are three levels: 1/3, 1/2 and 2/3 * VLED*3. All functions can be set up using a command to simplify the system design, the future plans to develop can provide lower power consumption, higher function models.