Ups 5Volt Circuit


Posted on Jul 22, 2012

A 9-V wall adapter supplies Vm. IC2 contains a low-battery detector circuit that senses l7IN by means of R6 and R7. The detector output Cpin 7) drives an inverter (Ql), which in turn drives the shut-down inputs Ic of 1C1 and SHDN of IC2. These inputs have opposite-polarity active levels. The common feedback resistors, R2 and R3 enable both regulators to sense the output voltage, V0VT. When IC2 shuts down, its output turns off.


Ups 5Volt Circuit
Click here to download the full size of the above Circuit.

However, when IC1 shuts down, the whole chip assumes a low-power state and draws under 1 . LI, D2, Gl, C2, R2, and R3 are part of the 250-mW switching regulator. Diodes D3 and D4 wire-OR the power connection to IC2, and 03 improves the linear regulator`s load regulation.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Super Class-A 30W Amplifier
    Low voltage detector
    Game roller or chase circuit
    Thermocouple-preamplifier
    kaizer sstc ii
    infrared emitter and detector using ic 74ls14
    ujt triggering circuit
    The current loop interface circuit diagram of AD694 being used as D / A converter
    Radiation Indicator



    Top