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  • Buck Boost vs. Buck Converter Battery Life for Portable 3.3V Micro Hard Disk Drive Applications
    drive voltage of. 3.3V, an obvious dilemma associated with this application is whether to use a low dropout DC/DC step-down. (buck) converter or a step-down/step-up (buck-boost) converter. A buck converter (Figure 1) provides the most efficient solution with the smallest external components
  • Buck-Boost LED Driver Using the PIC16F785 MCU
    This application note presents the design equations, schematics and source code for a 5.5W power LED driver using the PIC16F785 MCU. The application, as shown, can be connected to operate as a buck-boost converter or a boost converter. The PIC16F785 makes a great choice for this application because
  • Inverting Applications Made Simple
    Designers often require power sources with negative output voltages. There are many different ways to produce a negative output voltage from a positive input voltage. One option is a polarity-inverting buck-boost converter. The advantages of this topology are that it requires low component count
  • Connecting LEDs: Serial vs. Parallel
    battery (4.2V to 3.0V) used to power four white LEDs (LED forward voltage, VF, is typically 3.6V to 2.5V, depending on forward current, IF) to backlight a QVGA TFT panel. With a parallel configuration, all LED cathodes or anodes are connected together. This arrangement typically requires a buck-boost

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