MAX8647ETE+

Price range: $1.90

The MAX8647/MAX8648 drive up to six white LEDs ortwo sets of RGB LEDs with regulated constant currentfor display backlight and fun light applications. By utilizingan inverting charge pump and extremely low-dropoutadaptive current regulators, these ICs achievevery high efficiency over the full 1-cell Li+ battery voltagerange and even with large LED forward voltagemismatch. The 1MHz fixed-frequency switching allowsfor tiny external components. The regulation scheme isoptimized to ensure low EMI and low input ripple. TheMAX8647/MAX8648 include thermal shutdown, open- andshort-circuit protection.The MAX8647 features an I²C serial port, while theMAX8648 features a three-wire serial-pulse logic interface.Both devices support independent on/off anddimming for main and subbacklights. The dimmingranges are pseudo-logarithmic from 24mA to 0.1mAand off in 32 steps. Both devices include a temperaturederating function to safely allow bright 24mA full-scaleoutput current setting while automatically reducing currentto protect LEDs at high ambient temperaturesabove +60°C.The MAX8647/MAX8648 are available in a 16-pin, 3mm x 3mm thin QFN package (0.8mm max height).ApplicationsCamera Flash or RGB IndicatorsCellular Phones and SmartphonesPDAs, Digital Cameras, and CamcordersWhite LED Backlighting, Single or Dual DisplayWide-Gamut RGB LED Display Backlighting