High-Voltage, 3-Channel, High-Brightness LED Drivers

Maxim introduces the MAX16824/MAX16825 3-channel, high-brightness LED drivers with a 6.5V to 28V input-voltage range. These devices feature three 36V-rated, open-drain, constant-current sink outputs capable of delivering up to 150mA to three separate strings of HB LEDs. For optimal design flexibility, these ICs allow independent LED current setting of each channel. To implement this functionality, the MAX16824 provides three PWM dimming inputs to independently control the brightness of each string of LEDs and switch each string on or off. Conversely, the MAX16825 features a 3-bit transparent latch, a 3-bit shift register, and a 2Mbps, 4-wire serial interface. The serial interface allows all output channels to be controlled through an external microcontroller; it also enables multiple MAX16825 drivers to be cascaded and operated together.