收藏本站
参数资料
型号： AS1322B-BTTT
厂商： AUSTRIAMICROSYSTEMS AG
元件分类： DC/DC变换器
英文描述： Adj., 315mA, 1.2 MHz, Boost; Package Type: TSOT23-6; Miscellaneous: with Continuous Switching
中文描述： 低电压，微功耗，型DC - DC升压转换器
封装： TSOT23-6
文件页数： 12/18页
文件大小： 900K
代理商： AS1322B-BTTT
wwwaustriamcrosystems.com/DC-DC_Step-Up/AS1322
Revision 1.09
12 - 18
AS1322
Datasheet - Application Information
9.2 External Component Selection
9.2.1 Inductor Selection
The fast switching frequency (1.2MHz) of the AS1322 allows for the use of small surface mount or chip inductor for the external inductor
(see
Figure 15 on page 7)
.
The required mnimumvalues for the external inductor are:
!
3.3μH for applications
≤
3.6V
!
4.7μH for applications > 3.6V
Larger inductor values allow greater output current capability by reducing the inductor ripple current. Increasing the inductance above 10μH will
increase size while providing negligible improvement in output current capability.
The approximate output current capability of the AS1322 versus inductor value is given in:
Where:
η
is the estimated efficiency;
I
P
is the peak current limt value (0.6A);
V
IN
is the input voltage;
D is the steady-state duty ratio = (V
OUT
- V
IN
)/V
OUT
;
f is the switching frequency (1.2MHz typ);
L is the inductor value.
The inductor current ripple is typically set for 20 to 40% of the maximuminductor current (I
P
). High-frequency ferrite core inductor materials
reduce frequency dependent power losses compared to less expensive powdered iron types, which result in improved converter efficiency.
The inductor should have low ESR to reduce the I
2
R power losses, and must be able to handle the peak inductor current without saturating.
Molded chokes and some chip inductors normally do not have enough core to support the peak inductor currents of the AS1322 (850mA typ). To
mnimze radiated noise, use a toroid, pot core, or shielded bobbin inductor.
Table 5. Recommended Inductors
Part Number
MOS6020-103ML
MOS6020-472ML
MOS6020-332ML
CDRH4D18-100
CDRH4D18-6R8
CR43-6R8
CDRH4D18-4R7
L
DCR
93m
Ω
50m
Ω
46m
Ω
200m
Ω
200m
Ω
131.2m
Ω
162m
Ω
Current Rating
1A
1.5A
1.8A
0.61A
0.76A
0.95A
0.84A
Dimensions (L/W/T)
6.8x6.0x2.4mm
6.8x6.0x2.4mm
6.8x6.0x2.4mm
6.9x5.0x2.0mm
6.9x5.0x2.0mm
4.8x4.3x3.5mm
6.9x5.0x2.0mm
Manufacturer
10μH
4.7μH
3.3μH
10μH
6.8μH
6.8μH
4.7μH
Sumda
wwwsumda.com
(EQ 2)
I
OUT MAX
)
η
I
P
IN
D
f L 2
V
–
1
D
–
(
)
=
相关PDF资料
PDF描述
AS1323-BTTT-27 1.6μA Iq, Single Cell, Boost; Package Type: TSOT23-5; Output Range: 2.7V
AS1323-BTTT-30 1.6μA Iq, Single Cell, Boost; Package Type: TSOT23-5; Output Range: 3.0V
AS1323-BTTT-33 1.6μA Iq, Single Cell, Boost; Package Type: TSOT23-5; Output Range: 3.3V
AS1324-BTTT-AD 600mA Buck Converter; Package Type: TSOT23-5; Output Range: 0.6V to Vin
AS1324-BTTT-12 600mA Buck Converter; Package Type: TSOT23-5; Output Range: 1.2V
相关代理商/技术参数
参数描述
AS1322-EB 制造商:ams 功能描述:AS1322 Evaluation Board
AS1-322-W3-302 制造商:TE Connectivity 功能描述:
AS1323 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:1.6uA Quiescent Current, Single Cell, DC-DC Step-up Converter
AS1323_04 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:1.6??A Quiescent Current, Single Cell, DC-DC Step-up Converter
AS1323_1 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:1.6uA Quiescent Current, Single Cell, DC-DC Step-up Converter
发布紧急采购，3分钟左右您将得到回复。