MAX16824

19-1107; Rev 0; 11/07 High-Voltage, Three-Channel Linear High-Brightness LED Drivers www.datasheet4u.com General Description Features ♦ 6.5V to 28V Operating Range ♦ Outputs Connected to 36V Supply for Long LED Strings ♦ Three 36V-Rated Output Channels with Independently Adjustable LED Current ♦ 150mA Output Current Per Channel ♦ ±5% LED Current Accuracy ♦ PWM Dimming Three Independent Dimming Control Inputs (MAX16824) 4-Wire Serial Interface LED Current Chopping (MAX16825) ♦ +5V (±5%) Regulated Output with 4mA Source Capability ♦ Fast Transient Dimming Response ♦ 200mV Current-Sense Reference Reduces Power Loss ♦ Thermal Shutdown ♦ -40°C to +85°C Operating Temperature Range ♦ Thermally Enhanced, 16-Pin TSSOP Exposed Paddle Package MAX16824/MAX16825 The MAX16824/MAX16825 three-channel LED drivers operate over a 6.5V to 28V input voltage range. These devices provide three open-drain constant-current-sinking outputs that are rated to 36V and deliver up to 150mA of current to each string of high-brightness LEDs (HB LEDs). The current at each output is programmable by means of an external current-sense resistor. The MAX16824 features three PWM inputs that control the duty cycle of the output current, allowing a wide LED dimming range to be implemented. The PWM inputs also function as on/off control for each corresponding output. The MAX16825 offers a 2Mbps, 4-wire serial interface, a 3-bit shift register, and a 3-bit transparent latch. The serial interface allows a microcont...