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MC34063APS

更新时间： 2022-02-26 13:30:54

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MC34063APS 数据手册

MC34063A MC33063A

Figure 14. Design Formula Table

_sat=Saturation voltage of the output switch.

V_F= Forward voltage drop of the output rectifier.

The following power supply characteristics must be chosen:

_in– Nominal input voltage.

– Desired output voltage, | V _out| = 1.25 (1 + R2/R1)

out

– Desired output current.

_min– Minimum desired output switching frequency at the selected values of V and I .

out

V_{ripple (pp)}– Desired peak-to-peak output ripple voltage. In practice, the calculated capacitor value will need to be increase due to its

equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and

load regulation.

NOTE: For further information refer to Application Note AN920A/D and AN954/D.

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