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參數(shù)資料
| 型號： | AAT1230_0610 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 18V 100mA Step-Up Converter |
| 中文描述： | 18V的100mA的升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 8/21頁 |
| 文件大小： | 511K |
| 代理商： | AAT1230_0610 |
AAT1230/1230-1
18V 100mA Step-Up Converter
8
1230.2006.10.1.4
Functional Block Diagram
Control
V
REF1
Output
Select
Soft-Start
Timer
FB1
FB2
SEL
EN/SET
VP
LIN
VIN
SW
PGND
GND
V
REF2
Functional Description
The AAT1230/1230-1 consists of a DC/DC boost
controller, an integrated slew rate controlled input
disconnect MOSFET switch, and a MOSFET power
switch. A high voltage rectifier, power inductor, out-
put capacitor, and resistor divider network are
required to implement a DC/DC boost converter.
Control Loop
The AAT1230/1230-1 provides the benefits of cur-
rent mode control with a simple hysteretic feedback
loop. The device maintains exceptional DC regula-
tion, transient response, and cycle-by-cycle current
limit without additional compensation components.
The AAT1230/1230-1 modulates the power MOS-
FET switching current in response to changes in
output voltage. This allows the voltage loop to
directly program the required inductor current in
response to changes in the output load.
The switching cycle initiates when the N-channel
MOSFET is turned ON and current ramps up in the
inductor. The ON interval is terminated when the
inductor current reaches the programmed peak
current level. During the OFF interval, the input
current decays until the lower threshold, or zero
inductor current, is reached. The lower current is
equal to the peak current minus a preset hystere-
sis threshold - which determines the inductor ripple
current. The peak current is adjusted by the con-
troller until the output current requirement is met.
The magnitude of the feedback error signal deter-
mines the average input current. Therefore, the
AAT1230/1230-1 controller implements a pro-
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| AAT1230ITP | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:18V 100mA Step-Up Converter |
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