MB3878
■REFERENCE DATA
Conversion efficiency η (%)
Conversion efficiency vs. charge current | Conversion efficiency vs. charge voltage |
(Fixed voltage mode) | (Fixed current mode) |
100 | VIN = 19 V |
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| 100 |
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| VIN = 19 V |
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98 |
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| (%) | 98 |
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BATT charge voltage = 12.6 V | fOSC = 277.9 kHz |
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| BATT : Electronic load, |
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96 | η (%) = (VBATT ⋅ IBATT) | / (VIN ⋅ IIN) | ⋅ 100 | η | 96 |
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| (Product of KIKUSUI |
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94 |
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| efficiency | 94 |
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92 |
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| 92 |
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90 |
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| 90 |
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88 |
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| Conversion | 88 |
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86 |
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| 86 |
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84 |
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| 84 |
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82 |
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| 82 |
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80 |
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| 80 |
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10 m | 100 m | 1 |
| 10 |
| 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
BATT charge current IBATT (A) | BATT charge voltage VBATT (V) |
BATT voltage vs. BATT charge current
| 18 |
| VIN = 19 V |
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| 16 |
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(V) |
| BATT : Electronic load, |
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14 |
| (Product of KIKUSUI |
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BATT |
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12 |
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V | 10 |
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voltage | Dead Battery MODE |
| DCC MODE |
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8 |
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6 |
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BATT | 4 |
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2 |
| DCC : Dynamically Controlled Charging | ||||
| 0 |
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| 0 | 1 | 2 | 3 | 4 | 5 |
BATT charge current IBATT (A)
DC/DC converter switching waveforms
= |
BATT (V) 20
15
CTL (V) 10
205
150
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| VIN = 19 V |
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| Load : BATT = 20 Ω | ||
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| −INE2 = 0 V |
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| 5 V |
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| 5 V |
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| 20 ms |
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0 | 40 | 80 | 120 | 160 | 200 |
OUTH (V) 20
15
10
5
0
FB3 (V) 4
2
0
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| VIN | 19 V |
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| fOSC = 277.9 kHz |
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| Load : BATT = 1 A |
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| 5 V |
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| 2 V |
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| 1 ∝s |
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0 | 2 | 4 | 6 | 8 | 10 |
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| ∝ |
t (ms)
t ( s) |
19