MAX16825 Datasheet | Maxim Integrated

19-1107; Rev 0; 11/07 High-Voltage, Three-Channel Linear High-Brightness LED Drivers .. 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 - 150m A 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 4m A Source Capability - Fast Transient Dimming Response - 200m V 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 150m A 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 microcontroller to configure the output channels using four inputs (DIN, CLK, LE, OE) and a data output (DOUT). DOUT allows multiple drivers to be cascaded and operated together. The MAX16824/MAX16825’s on-board pass elements minimize the need for external ponents, while at the same time, providing ±5% LED current accuracy. Additional Features include a +5V (±5%) regulated output with 4m A output current capability and thermal protection. The MAX16824/MAX16825 are available in a thermally enhanced...