Part # MAX6972-MAX6973 datasheet

Part Manufacturer: Maxim

Maxim

Part Description: MAX6972 73 - DS


Part Details:

19-0534; Rev 0; 5/06 EVALUATION KIT AVAILABLE 16-Output PWM LED Drivers for Message Boards MAX6972/MAX6973 General Description Features The MAX6972/MAX6973 precision current-sinking, 16 LED Current Sink Outputs (Two Banks of Eight 16-output PWM LED drivers drive red, green, and/or blue Outputs) LEDs for full-color graphic message boards and video 32 LED Drive Option When Multiplexing displays. Each output has an individual 12-bit (MAX6972) 33MHz Clock Supports Up to 63 Frames per or 14-bit (MAX6973) PWM-intensity (hue) control and Second of Video 7-bit (MAX6972) or 5-bit (MAX6973) global PWM intensity Constant Output Current Calibration from 11mA (luminance) control. The MAX6972/MAX6973 also fea- to 55mA in 256 Steps ture open-circuit LED fault-detection circuitry, as well asa watchdog timer. EZCascadeTM Interface Simplifies Multiple Driver Cascading Without External Buffers The driver has two banks of eight outputs, with each bank 12-Bit or 14-Bit Individual PWM LED Intensity intended to drive a different color in RGB applications. Controls The standard application uses three MAX6972/MAX6973s to drive eight RGB LEDs. The full-scale current 7-Bit or 5-Bit Panel PWM-Intensity Control for each bank of eight outputs is adjustable from 11mA +3V to +7V LED Power Supply to 55mA in 256 steps (0.3125% per step) to calibrate +3.0V to +3.6V Logic Supply each color. Open-Circuit LED Fault Detection The MAX6972/MAX6973 can optionally multiplex by Optional Watchdog Timer Blanks Display if using outputs MUX0 and MUX1, which each drive an Interface Fails external pnp transistor. Multiplexing doubles the MAX6972/MAX6973 drive capability to 32 LEDs. Standard -40°C to +125°C Operating TemperatureRange The MAX6972/MAX6973 operate from a 3.0V to 3.6Vpower supply. The LED power supply can range from Ordering Information 3V to 7V. The LED drivers require only 0.8V headroomabove the LEDs forward-voltage drop. Using a sepa- PIN- PKG PART TEMP RANGE rate LED supply voltage for each LED minimizes power PACKAGE CODE


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MAX6972-MAX6973.pdf Datasheet