Simplified Block Diagram
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- Negative 1x/1.5x Charge Pump
- Adaptive Current Regulators
- Independent Voltage Supply for Each LED
- 24mA to 0.1mA Serial-Pulse Dimming (MAX8848Y)
- 24mA to 0mA PWM Dimming (MAX8848Z)
- 2% (max) LED Current Accuracy, 1% (typ) Matching
- Low 120µA Quiescent Current
- Low 0.4µA Shutdown Current
- Inrush Current Limit
- Temperature Derating Function
- 16-Pin, 3mm x 3mm Thin QFN Packages
- Cellular Phones
- PDAs, Digital Cameras, and Camcorders
- White LED Backlighting
The MAX8848Y/MAX8848Z support independent LED on/off and dimming control. The MAX8848Y dimming ranges are pseudo-logarithmic from 24mA to 0.1mA and off in 32 steps. All devices include a temperature derating function to safely allow bright 24mA full-scale output current while automatically reducing current gradually to protect LEDs at high ambient temperatures above +60°C.
The MAX8848Y/MAX8848Z are available in 16-pin, 3mm x 3mm thin QFN packages.