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參數(shù)資料
| 型號： | AAT1230ITP-1-T1 |
| 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)： | 11/21頁 |
| 文件大?。?/td> | 511K |
| 代理商： | AAT1230ITP-1-T1 |
AAT1230/1230-1
18V 100mA Step-Up Converter
1230.2006.10.1.4
11
The average diode current is equal to the output
current.
The average output current multiplied by the for-
ward diode voltage determines the loss of the out-
put diode.
Diode junction temperature can be estimated.
Output diode junction temperature should be
maintained below 110oC, but may vary depending
on application and/or system guidelines. The
diode
θ
JA
can be minimized with additional PCB
area on the cathode. PCB heatsinking the anode
may degrade EMI performance.
The reverse leakage current of the rectifier must be
considered to maintain low quiescent (input) cur-
rent and high efficiency under light load. The recti-
fier reverse current increases dramatically at high
temperatures.
Selecting the Boost Inductor
The AAT1230/1230-1 controller utilizes hysteretic
control and the switching frequency varies with
output load and input voltage. The value of the
inductor determines the maximum switching fre-
quency of the AAT1230/1230-1 boost converter.
Increased output inductance decreases the switch-
ing frequency, resulting in higher peak currents and
increased output voltage ripple. To maintain 2MHz
maximum switching frequency and stable opera-
tion, an output inductor sized from 1.5μH to 2.7μH
is recommended.
A better estimate of D
MAX
is possible when V
F
is
known.
Where V
F
is the Schottky diode forward voltage. If
not known, it can be estimated at 0.5V.
Manufacturer’s specifications list both the inductor
DC current rating, which is a thermal limitation, and
peak inductor current rating, which is determined
by the saturation characteristics. Measurements at
full load and high ambient temperature should be
completed to ensure that the inductor does not sat-
urate or exhibit excessive temperature rise.
The output inductor (L) is selected to avoid satura-
tion at minimum input voltage, maximum output load
conditions. Peak current may be estimated using
the following equation, assuming continuous con-
duction mode. Worst-case peak current occurs at
minimum input voltage (maximum duty cycle) and
maximum load. Switching frequency can be estimat-
ed from the curves and assumes a 2.2μH inductor.
Output Current (mA)
S
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
40
50
60
70
80
90
100
V
IN
= 2.7V
V
OUT
= 15V
V
IN
= 2.7V
V
OUT
= 18V
V
IN
= 3.0V
V
OUT
= 15V
V
IN
= 3.0V
V
OUT
= 18V
V
IN
= 3.6V
V
OUT
= 15V
V
IN
= 3.6V
V
OUT
= 18V
(V
OUT
+ V
F
- V
IN(MIN)
)
(V
OUT
+ V
F
)
D
MAX
=
T
J(DIODE)
= T
AMB
+
Θ
JA
· P
LOSS(DIODE)
P
LOSS(DIODE)
= I
AVG(TOT)
·
V
F
= I
OUT
·
V
F
I
AVG(TOT)
= I
OUT
Forward Voltage (V)
F
10
100
1000
10000
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
B340LA
MBR0530
ZHCS350
BAT42W
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT1230ITP-T1 | 18V 100mA Step-Up Converter |
| AAT1230_0610 | 18V 100mA Step-Up Converter |
| AAT1230-1 | 18V 100mA Step-Up Converter |
| AAT1230IRN-T1 | 18V 100mA Step-Up Converter |
| AAT1236 | High Efficiency White LED Drivers for Backlight and Keypad |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1230ITP-T1 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 18V 100mA Step-Up Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| AAT1231 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231ITP | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231ITP-1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Step-Up DC/DC Converters for White LED Backlight Applications |
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