CAT3626AEVB CAT3626 6-Channel LED Driver Evaluation Board User s Manual CAT3626AEVB The CAT3626 input voltage, VIN is supplied on board sets different LED current values for each of 3 groups LED from a fixed +5 V or +3 V voltage (internally provided) or output channels. As a result the 2 RGB LEDs will provide from an external voltage applied to the VEXT (T5) pad. The the colors mixing between RED, GREEN and BLUE with voltage supplied at the VIN input of the CAT3626 device can different intensities. This loop is executed as long as the be selected using the jumper options for the K1 connector. board is powered. When using an internal supply (9 V battery), set the jumper NOTE: To use as a standalone board, the J9 connector to position 16 for the +5 V voltage or to position 25 for the must have the jumper removed otherwise, the +3 V voltage. To apply an external voltage, a shunt must be microcontroller does not start the routine of placed in position 34 and an additional shunt must be controlling the CAT3626 at poweron. placed in either the 16 or 25 position. CAT3626DB1 Board Controlled through the PC Serial The board uses an 8bit microcontroller, 8051 type. The Interface microcontroller provides the signals on the SCL, SDA and The user can set the desired LED current value for each of EN lines to control the CAT3626. CAT3626 output channel connecting the CAT3626DB1 The user can connect, or disconnect the CAT3626 outputs through a PC serial interface. The CAT3626DB1 software to the LEDs using the jumper options for J1, J2, J3, J4, J5, provides the user a very friendly graphical interface (GUI) J6 and J7 connectors. J1 to J7 header pin connectors can be for sending all the commands to drive on/off any LEDs used to insert a current meter to evaluate the programmed configuration and to program the LEDs current. LED current on each channel. The CAT3626DB1 software requires the following The board is powered when the POWER switch is ON. minimum system configuration: The CAT3626DB1 boards are populated with two RGB Microsoft Windows 98SE or Above LEDs (Everlight EL6123RGBC). The component placement, top side, for the 100K of Available Hard Disc Space CAT3626DB1 and the board picture are shown in Figure 2. Serial Interface Port The detailed schematic and the list of components for the The software is available on the CAT3626DB1 software CAT3626DB1 are shown in the Appendix attached in the distribution CD ROM or can be downloaded at: end of this document.