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參數(shù)資料
| 型號(hào)： | AT1309X |
| 廠商： | Aimtron Technology Corp. |
| 元件分類(lèi)： | DC/DC變換器 |
| 英文描述： | Micro-Power Step up DC-DC Converter |
| 中文描述： | 微功耗升壓DC - DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 11/14頁(yè) |
| 文件大?。?/td> | 295K |
| 代理商： | AT1309X |
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AT1309
Preliminary Product Information
Micro-Power Step up DC-DC Converter
Application Information
External components of boost converter can be designed by performing simple
calculations.
Boost inductor
Inductor selection depends on input voltage, output voltage, maximum output current,
switching frequency and availability of inductor values. The following boost circuit
equations are useful in choosing the inductor values based on the application. They
allow the trading of peak current and inductor value while allowing for consideration
of component availability and cost.
The peak inductor current is given by:
I
I
I
LAVG
Lpeak
+
=
2
D
I
I
O
LAVG
L
=
1
where:
I
L
is the inductor peak-to-peak current ripple and is decided by:
D
L
D is the MOSFET turn on ratio and is decided by:
V
V
D
=
OSC
in
L
f
V
I
×
=
O
in
O
V
f
OSC
is the switching frequency.
The inductor should be chosen to be able to handle this current and inductor saturation
current rating should be greater than I
PEAK
.
Diode selection
The output diode has average current of I
O
, and peak current the same as the
inductor’s peak current and a voltage rating at least 1.5 times the output voltage.
Schottky diode is recommended and it should be able to handle those current.
Output Capacitor
The AT1308 is specially compensated to be stable with capacitors which have a worst-
case minimum value of 1uF at the particular V
OUT
being set. Output ripple voltage
requirements also determine the minimum value and type of capacitors. Output ripple
voltage consists of two components the voltage drop caused by the switching current
through the ESR of the output capacitor and the charging and discharging of the
output capacitor
:
I
V
×
For low ESR ceramic capacitors, the output ripple is dominated by the charging or
discharging of the output capacitor.
OSC
OUT
O
O
in
O
LPEAK
RIPPLE
f
C
V
V
ESR
I
V
×
+
×
=
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW:
http://www.aimtron.com.tw
3/2/2006 REV:1.1 Email:
service@aimtron.com.tw
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT1309X-GRE | Micro-Power Step up DC-DC Converter |
| AT1310 | MicroPower Charge Pump Converter |
| AT1310X | MicroPower Charge Pump Converter |
| AT1310X-PBF | MicroPower Charge Pump Converter |
| AT1312 | High Efficiency, Constant Current White-LEDs Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT1309X-GRE | 制造商:AIMTRON 制造商全稱(chēng):AIMTRON 功能描述:Micro-Power Step up DC-DC Converter |
| AT1310 | 制造商:AIMTRON 制造商全稱(chēng):AIMTRON 功能描述:MicroPower Charge Pump Converter |
| AT-1310-H | 制造商:HRS 制造商全稱(chēng):HRS 功能描述:High Power Fixed Attenuators (Heat sink Mounting Type) |
| AT-1310-H.J(40) | 功能描述:衰減器 -互連 RoHS:否 制造商:Pomona Electronics 最大衰減: 容差: 頻率范圍:DC to 500 MHz 阻抗:50 Ohms 功率額定值:2 W 端接類(lèi)型:Crimp 連接器類(lèi)型:BNC Male / Female 工作溫度范圍:0 C to + 102 C |
| AT-1310-J | 制造商:HRS 制造商全稱(chēng):HRS 功能描述:High Power Fixed Attenuators (Heat sink Mounting Type) |
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