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Part Number: AN731
Description: Figure 1 shows a typical dc-to-dc converter configuration. As in many PWM controllers, the non-inverting input of the v...
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AN731
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General Description
AN731 General Description
Figure 1 shows a typical dc-to-dc converter configuration. As in many PWM controllers, the non-inverting input of the voltage feedback error amplifier is internally connected to the reference voltage, Vr. The output voltage of the converter is set by a resistor divider network R1 and R2. This configuration enables a fixed output voltage that is equal to or greater than the reference voltage. But in many power conversion designs, it is useful to vary the output to a value lower than the reference voltage and to dynamically adjust the output voltage. The op-amp circuit shown in Figure 3 gives designers a simple way to do this. Scaling the output voltage with respect to a control voltage VC is totally flexible. This application note describes how to use this simple solution and provides a step-by-step design procedure to assist designers in calculating the specific parameters required by their circuits.
AN731
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- Datasheet: AN731
- File Size: 79177 KB
- Manufacturer: VISAY [Vishay Siliconix]
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