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參數(shù)資料
| 型號(hào)： | AIC1639 |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | 3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
| 中文描述： | 3引腳單細(xì)胞升壓型DC / DC變換器 |
| 文件頁(yè)數(shù)： | 10/11頁(yè) |
| 文件大小： | 159K |
| 代理商： | AIC1639 |
AIC1639
3-PIN ONE-CELL STEP-UP DC/DC CONVERTER
SPEC NO: DS-1639-00 05/26/00
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
10
Valley current (Iv) is
2L
+
=
2
x
Ton
Vsw
Vin
Iout
2
x
Vsw
Vin
Vsw
Vd
Vout
IV
Table 1 Indicates resistance and height for each coil.
Power Inductor Type
Inductance (
μ
H )
Resistance (
)
Rated Current (A)
Hieght
(mm)
47
0.25
0.7
Sumida SMT Type CD54
100
0.50
0.5
4.5
47
0.25
0.7
Hold SMT Type PM54
100
0.50
0.5
4.5
Hold SMT Type PM75
33
0.11
1.2
5.0
Huan Feng PIN Type V0810
33
40m
2
10.0
CAPACITOR SELECTION
A poor choice for a output capacitor can result in poor
efficiency and hight output ripple. Ordinary aluminum
electrolytics, while inexpensive may have unacceptably
poor ESR and ESL. There are low ESR aluminum ca-
pacitors for switch mode DC-DC converters which work
much better than general porpuse unit. Tantalum ca-
pacitors provide still better performance at more expen-
sive. OS-CON capacitors have extremely low ESR in a
small size. If capacitance is reduced, output ripple will
increase.
Most of the input supply is supplied by the input by-
passs capacitor, the capacitor voltage rating should be
at least 1.25 times greather than a maximum input volt-
age.
DIODE SELECTION
Speed, forward drop, and leakage current are the three
main consideration in selecting a rectifier diode. Best
performance is obtained with Schottky retifier diode
such 1N5819. Motorola makes MBR0530 in surface
mount. For lower output power a 1N4148 can be used
although efficiency and start-up voltage will suffer sub-
stantially.
COMPONENT POWER DISSIPATION
Opeating in discontinuous mode, power loss in the
winding resistance of inductor can be approximate
equal to
(
)
(
)
Pout
Vout
Vd
Vout
Rs
L
Ton
PD
L
+
=
3
2
where Pout=Vout * Iout ; Rs=Inductor DC R;
V
D
= Diode drop.
The power dissipated in a switch loss is
(
)
(
)
Pout
Vout
Vin
Vd
Vout
Ron
L
Ton
PDsw
+
=
3
2
The power dissipated in rectifier diode is
(
)
Pout
Vout
Vd
PDd
=
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相關(guān)代理商/技術(shù)參數(shù) |
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| AIC1639-27CX | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
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| AIC1639-30CX | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
| AIC1639-30CZ | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
| AIC1639-33CX | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:3-PIN ONE-CELL STEP-UP DC/DC CONVERTER |
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