UPB1009K Necs Low Power Gps Rf Receiver Bipolar Analog Integrated Circuit


Posted on Feb 5, 2014

Abstract: The MAX1896 MAX1973 and MAX8863 combine to deliver 5V at 225mA, 1. 8V at 220mA, and 3. 3V at 60mA from a USB port. The schematics, BOM and performance data appear below. USB devices draw power from the USB port. The voltage is 4. 5V to 5. 25V and the current is limited initially to 100mA maximum. After enumeration, the current limit may be i


UPB1009K Necs Low Power Gps Rf Receiver Bipolar Analog Integrated Circuit
Click here to download the full size of the above Circuit.

ncreased to 500mA maximum. Therefore, the practical power consumption is limited to about 2W at 4. 5V. Switching power supplies are preferred so that this limited power CAN be fully utilized. The DSL frequency band extends to about 1. 1MHz. To maintain maximum data throughput in DSL modems, the fundamental switching frequency should be 1. 2MHz or higher. The MAX1896 MAX1973 and MAX8863 combine to deliver 5V at 225mA, 1. 8V at 220mA, and 3. 3V at 60mA from a USB port. The schematics, BOM and performance data appear below. The MAX1896 is a Step-up Regulator configured as a SEPIC that switches at 1. 4MHz. The MAX1973 is a Step-down Regulator that switches at 1. 4MHz. The MAX8863 is a 100mA linear Regulator Each has a shutdown control to facilitate USB port enumeration and standby mode. The total input current required at 4. 5V input to provide maximum output power is less than 491mA. The overall efficiency is 79. 8% for 1. 76W output at 4. 5V input. The tallest component is the 3. 3 µH Sumida inductor at 1. 8mm maximum.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    2 Watt FM Transmitter
    active medium wave antenna
    avr Programming an ATmega1284p with Arduino IDE and internal RC Oscillator
    Volt To Current
    Line Bal Test Meter
    maze robot sensor integration
    Simple Telephone Timer Circuit PCB
    2X15 Watt stereo amplifier using TDA4935
    Ultrasound Pulser
    150W MP3 Car Amplifier
    AM Modulator
    555 car circuit diagram of the device



    Top