Ripple power supply device and method for providing direct-current voltage with ripples
A technology of DC voltage and power supply device, which is applied in output power conversion device, DC power input conversion into DC power output, electrical components and other directions, can solve the problems of high cost and insufficient voltage load capacity, and achieve strong load capacity. , the effect of simple circuit design
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Embodiment 1
[0043] In Example 1, LVR U11 is LM2941T, Q1 is 2SK1824, U2 and U3 are both LM324, R1 is 4.7KΩ, R2 is 22Ω, R3 is 47KΩ, R4 is 1KΩ, R5 is 100KΩ, R6 is 10KΩ, R7 is 10KΩ and C2 is 100µF. The output of the ripple power supply device is connected to a 300mA load, and its input voltage Uin is 12V. like Figure 2c As shown, the figure shows the waveform of the output voltage tested when a 1.5V DC voltage is applied to the control voltage input without applying a ripple signal. Obviously, the output voltage waveform at this time is a DC output waveform without ripple (or without interference signal), and its voltage value is 8.1V, which has a certain load capacity. like Figure 2d As shown, it is the waveform of the output voltage tested when 1.5V DC voltage and 220mV, 100Hz sinusoidal ripple signal are applied to the control voltage input terminal at the same time. The output voltage waveform at this time is also a sine wave, which is at Figure 2c The 8.1V DC voltage is superimpo...
Embodiment 2
[0048] In Example 2, DC-DC U21 is TPS5450, Q1 is 2SK1824, U2 and U3 are LM324, R1 is 4.7KΩ, R2 is 22Ω, R3 is 47KΩ, R4 is 1KΩ, R5 is 100KΩ, R6 is 10KΩ, R7 is 10KΩ and C2 is 100μF. The output of the ripple power supply device is connected to a 1.5A load, and its input voltage Uin is 15V. like Figure 3b As shown in , it is the waveform of the output voltage tested when a 2.7V DC voltage is applied to the control voltage input terminal without applying a ripple signal. Obviously, the output voltage waveform at this time is a DC output waveform without ripple (or without interference signal), and its voltage value is 13.2V, which has a certain load capacity. like Figure 3c As shown, it is the waveform of the output voltage tested when 2.7V DC voltage and 220mV, 4000Hz sinusoidal ripple signal are applied to the control voltage input terminal at the same time. The output voltage waveform at this time is also a sine wave, which is at Figure 3b The 13.2V DC voltage is superimp...
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