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MAX16824 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX16824 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 13 page General Description 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-sink- ing 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 4-wire serial interface, a 3-bit shift register, and a 3-bit transparent latch. The ser- ial interface allows a microcontroller to configure the out- put 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 components, while at the same time, providing ±5% LED current accuracy. Additional features include a +5V (±5%) regulated output with 4mA output current capability and thermal protection. The MAX16824/MAX16825 are available in a thermally enhanced 16-pin TSSOP-EP package and specified over the -40°C to +125°C temperature range. Applications Industrial Lighting Architectural and Decorative Lighting Mood Lighting Indoor and Outdoor LED Video Displays Automotive Lighting LCD Display Backlighting Features o 6.5V to 28V Operating Range o Outputs Connected to 36V Supply for Long LED Strings o Three 36V-Rated Output Channels with Independently Adjustable LED Current o 150mA Output Current Per Channel o ±5% LED Current Accuracy o PWM Dimming Three Independent Dimming Control Inputs (MAX16824) 4-Wire Serial Interface LED Current Chopping (MAX16825) o +5V (±5%) Regulated Output with 4mA Source Capability o Fast Transient Dimming Response o 200mV Current-Sense Reference Reduces Power Loss o Thermal Shutdown o -40°C to +125°C Operating Temperature Range o Thermally Enhanced, 16-Pin TSSOP Exposed Paddle Package High-Voltage, Three-Channel Linear High-Brightness LED Drivers ________________________________________________________________ Maxim Integrated Products 1 19-1107; Rev 2; 4/09 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. EVALUATION KIT AVAILABLE OUT1 OUT3 OUT2 CS1 CS2 CS3 IN 1 16 3 7 8 9 4 11 12 2 15 13 PWM1 PWM2 PWM3 REG GND CREG CIN VIN UP TO 36V RCS2 RCS1 RCS3 MAX16824 Typical Operating Circuits Ordering Information PART TEMP RANGE PIN PACKAGE MAX16824AUE+ -40°C to +125°C 16 TSSOP-EP* MAX16824AUE/V+ -40°C to +125°C 16 TSSOP-EP* MAX16825AUE+ -40°C to +125°C 16 TSSOP-EP* + Denotes a lead(Pb)-free/RoHS-compliant package. * EP = Exposed pad. /V denotes an automotive qualified part. Pin Configurations appear at end of data sheet. OUT1 OUT3 OUT2 CS1 CS2 CS3 IN CLK DIN LE REG GND CREG CIN VIN RCS2 RCS1 RCS3 OE MICROCONTROLLER MAX16825 1 16 3 6 7 8 9 4 11 12 2 15 13 UP TO 36V |
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