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| 型號(hào)： | AS1344-BTDT |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 42V DCDC for OLED; Package Type: TDFN(3x3)-10 |
| 封裝： | TDFN(3x3)-10 |
| 文件頁數(shù)： | 14/19頁 |
| 文件大小： | 1807K |
| 代理商： | AS1344-BTDT |
www.austriamicrosystems.com
Revision 1.05
14 - 19
AS1344
Datasheet - Application Information
Inductor Selection
For the external inductor, a 4.7μH or 6.8μH inductor will usually suffice. Minimum inductor size is dependant on the
desired efficiency and output current. Inductors with low core losses and small DCR at 1MHz are recommended. It’s
also recommended to choose an inductor which can handle at least 1.2A without saturating. The MOS6020 is a very
good choice because the DCR is quite small and the saturation current exceeds 1.2A. For space limiting applications
and input currents below 650mA the EPL2014 can be selected. Efficiency losses due to higher DCR should be consid-
ered. (see
Figure 37
and
Figure 38
)
Note:
For the Efficiency measurements in
Figure 37
and
Figure 38
a MBR0540 diode was used for D
1
.
Table 5. Recommended Inductors
Part Number
EPL2014-472MLC
LPS3015-472MLC
LPS4018-682MLC
LPS5030-682ML_
MOS6020-682MLC
MOS6020-472MLC
L
DCR
0.231
Ω
0.200
Ω
0.150
Ω
0.099
Ω
0.078
Ω
0.050
Ω
I
SAT
@ 20% drop Dimensions (L/W/T)
0.65A
1.2A
1.3A
1.7A
1.56A
1.82A
Manufacturer
Coilcraft
4.7μH4.7μH
6.8μH
6.8μH
6.8μH
4.7μH
2.2x2.0x1.4mm
3.1x3.1x1.5mm
4.1x4.1x1.8mm
4.88x4.88x3.0mm
6.0x6.8x2.4mm
6.0x6.8x2.4mm
Figure 37. Efficiency Comparison of different
Inductors; V
IN
= 3V, V
OUT
= 18V
90
Figure 38. Efficiency Comparison of different
Inductors; V
IN
= 3.6V, V
OUT
= 18V
90
0
10
20
30
40
50
60
70
80
0.1
1
10
100
Output Current (mA)
E
MOS6020 6.8μH
LPS5030 6.8μH
LPS4018 6.8μH
MOS6020 4.7μH
LPS3015 4.7μH
EPL2014 4.7μH
0
10
20
30
40
50
60
70
80
0.1
1
10
100
Output Current (mA)
E
MOS6020 6.8μH
LPS5030 6.8μH
LPS4018 6.8μH
MOS6020 4.7μH
LPS3015 4.7μH
EPL2014 4.7μH
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