Switch Mode Regulator Provides -12V Negative Supply from Positive Supply

Posted on February 1, 2010 by Adam

This is a circuit that can provide -12 V negative supply from positive supply. The output voltage is Vo= -Vin· D/(1-D). The maximum output current is Iout=1·(1-D). Here is the circuit :

Switch Mode Regulator Provides 12V Negative Supply from Positive Supply circuit schematic diagram

In this circuit, the ground of U1 is connected to negative output voltage. The input voltage of U1 must be lower than maximum operating input voltage, 36V, because the U1′s input voltage equal to Vin-Vo. [Source: STMicroelectronics Application Note]

This entry was posted in Power Supply and tagged . Bookmark the permalink.,

Possibly Related to "Switch Mode Regulator Provides -12V Negative Supply from Positive Supply" Circuits

  • Buck-Boost (Switch Mode) Regulator Provides 12V from 5-35V Supply
    This is positive buck-boost regulator circuit. Using this circuit, we can implement a step-down/up converter with a positive output voltage. This circuit produces an output voltage of 12 V. Here is the circuit : This circuit requieres input voltage between … Continue reading →...
  • Combined Positive Multiplication and Negative Voltage Conversion
    This is a Combined Positive Multiplication and Negative Voltage Conversion circuit, a popular application for MAX1044/ICL7660. Here is the circuit: This circuit can provides both negative and positive voltage. TO provide negative voltage, this circuit uses C3 and C1 which … Continue reading →...
  • Digitally Controlled Negative Voltage Supply
    Despite the popularity of single-supply ICs, a negative control voltage is still required by some applications. Modern, inverted R-2R ladder DAC and op amp is the solution for this purpose. This approach offers lower supply voltages, higher speed, and smaller … Continue reading →...
  • LM10 Negative Regulator
    It is possible to build a negative regulator using LM10 comparator and voltage reference IC. A transistor is employed to shift the reference current, increasing the minimum operating voltage to approximately 1.8V. The transistor should has high gain for better … Continue reading →...
  • Positive Voltage Doubler
    This is a simple circuit of Positive Voltage Doubler. This circuit uses the MAX1044/ICL7660. The schottky diode was chosen to reduces the voltage drop. This circuit also uses MAX660 for voltage doubling or higher output currents. Here is the circuit: … Continue reading →...

Comments are closed.