Fujitsu MB39A104 manual 2 π ⋅ 500 ⋅ 10 3 ⋅ 0.050 − 0.491 ⋅, 2 π ⋅ 500 ⋅ 10 3 ⋅ 0.033 − 0.364 ⋅

MB39A104

CH2	ΔVO
ESR ≤		−			1
	ΔIL			2πfCL
≤	0.033		−			1
	0.364				2π ⋅ 500	⋅ 103	⋅ 82 ⋅ 10−6

≤86.8 mΩ

Capacitance value

CH1	ΔIL
CL ≥
	2πf (ΔVO − ΔIL ⋅ ESR)
≥	0.491
	2π ⋅ 500 ⋅ 103 ⋅ (0.050 − 0.491 ⋅ 0.05)

≥6.14 ∝F

CH2	ΔIL
CL ≥
	2πf (ΔVO − ΔIL ⋅ ESR)
≥	0.364
	2π ⋅ 500 ⋅ 103 ⋅ (0.033 − 0.364 ⋅ 0.05)

≥7.83 ∝F

Ripple current
CH1
ICLrms ≥	(VIN − VO) ton
		2√3L
≥		(19 − 5) ⋅ 0.263
		⋅ 15 ⋅ 10−6 ⋅ 500 ⋅ 103
	2√3

≥141.7 mArms

CH2

ICLrms ≥	(VIN − VO) ton
		2√3L
≥			(19 − 3.3)	⋅ 0.174
			⋅ 15 ⋅ 10−6	⋅ 500 ⋅ 103
	2√3

≥105.1 mArms

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