- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382828 > AAT1160 (Advanced Analog Technology,lnc.) Step Up Current Mode PWM Converter with 4+1 Operational Amplifiers PDF資料下載
參數(shù)資料
| 型號(hào)： | AAT1160 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | Step Up Current Mode PWM Converter with 4+1 Operational Amplifiers |
| 中文描述： | 升壓電流模式PWM轉(zhuǎn)換器，具有4 1運(yùn)算放大器 |
| 文件頁(yè)數(shù)： | 10/14頁(yè) |
| 文件大?。?/td> | 372K |
| 代理商： | AAT1160 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)當(dāng)前第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)
Advanced Analog Technology, Inc.
–
–
–
Advanced Analog Technology, Inc
.
–
Page 10 of 14 V 1.0
AAT1160
Operation Information:
Setting the Output Voltage:
Output voltage is set by using a feedback pin and a
resistor divider; equation is as follows:
V =1.265 (1+R1/R2)
Soft-Start:
The soft-start function is embedded with a typical
setting of 14ms
Operation Frequency Setting:
Pin4 (FREQ) can set PWM operation to low with
f
=600kHz, or set PWM operation to high with
f
=1.2 MHz.
OSC
OSC
Diode Selection:
Schottky diode for the boost regulator must be
selected correctly depending on the output voltage
and the output current. The diode must have a
reverse voltage equal to or greater than the output
voltage. In addition, the diode current must
exceed the switch current limit as a lower forward
voltage will increase efficiency.
Inductor Selection:
I
=
IN
I
+
V *D/(2*L*
L(peak)
S
f )
D: PWM duty
V /
V =1/ (1-D)
Maximum current of the inductor must be greater
than
L(peak)
I
The Compensation:
Pin17 (EO) series with
compensation, usually range as 1k
, 100pF
≤
C
C
≤
6,800pF. Standard formulas are
only for reference purpose, as PCB has a lot of
noise or parasitic capacitance and resistance, it
often requires on board adjustment.
The key steps for step-up compensation are as
follows:
Transconductance (from FB to CC),
Current-sense amplifier transresistance,
R &
C for
≤
C
R
≤
200k
g (105
μ
S)
R
CS
(0.275V/A)
For continuous conduction, the right-half-plane
zero frequency (
RHPZ
f
) is given by the following:
f
=
V (1-D)
2
/(2
*L*
duty cycle=1-(
V /
V ), L is the inductance value,
and
LOAD
I
is the maximum output current. Typical
target, crossover (
RHPZ
LOAD
I
) where D=the
C
f ), is 1/6 of the RHPZ.
For example, if oscillation frequency is assumed to
be
OSC
f
=500kHz,
V =2.5V,
I
=0.5A, then
LOAD
R
L=4.7
μ
H, then:
f
=5(2.5/5)
2
/(2
*4.7*10
-6
*0.5)=84.65kHz
If
C =(
V /
V )(
LOAD
R
/
R
1.25/5)(10/0.275)*[105
μ
S/(6.28*14kHz)](1/4)=2.7
nF
Now selected
C
R
requirements. For example, if 4% of transient
droop is allowed, input to error amplifier moves
V =5V, and
. If we select
OUT
=10
RHPZ
C
f =14kHz, C
C
would be calculated
as:
CS
)(
g /2
π
*
C
f )(1-D)/2=(
has fulfilled transient-droop
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT1231 | Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231ITP-1-T1 | Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1231ITP-T1 | Step-Up DC/DC Converters for White LED Backlight Applications |
| AAT1232 | 24V 100mA Step-Up Converter |
| AAT1232IRN-T1 | 24V 100mA Step-Up Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1160IRN-0.6-T1 | 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
| AAT1161 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:13.2V Input, 3A Step-Down Converter |
| AAT1162 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:12V, 1.5A Step-Down DC/DC Converter |
| AAT1162_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:12V, 1.5A Step-Down DC/DC Converter |
| AAT1162IRN-0.6-T1 | 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。