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参数资料
| 型号： | IR3629 |
| 厂商： | International Rectifier |
| 英文描述： | HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER WITH POWER GOOD OUTPUT |
| 中文描述： | 高频同步PWM降压控制器与电源良好输出 |
| 文件页数： | 8/23页 |
| 文件大小： | 598K |
| 代理商： | IR3629 |
IR3629/IR3629A MPbF
11/26/2007
Based on the frequency of the zero generated by
the output capacitor and its ESR versus
crossover frequency, the compensation type can
be different. The table below shows the
compensation
types
and
location
of
the
crossover frequency.
The following design rules will give a crossover
frequency
approximately
one-tenth
of
the
switching frequency. The higher the band width,
the potentially faster the load transient response.
The DC gain will be large enough to provide high
DC-regulation accuracy (typically -5dB to -12dB).
The phase margin should be greater than 45o for
overall stability.
Desired Phase Margin:
Ceramic
F
LC<Fo<Fs/2<FESR
TypeIII(PID)
Method B
Tantalum,
ceramic
F
LC<Fo<FESR<Fs/2
TypeIII(PID)
Method A
Electrolytic
, Tantalum
F
LC<FESR<Fo<Fs/2
TypII(PI)
Output
capacitor
F
ESR vs. Fo
Compensator
type
3
π
=
Θ
max
Table1- The compensation type and location
of F
ESR versus Fo
The details of these compensation types are
discussed in application note AN-1043 which can
be downloaded from IR’s website at www.irf.com.
For this design we have:
V
in=12V
V
o=0.9V
V
osc=1.25V
V
ref=0.6V
g
m=1000umoh
L
o=0.56uH
C
o=5x22uF, ESR=2mOhm
Note: Use 15uF instead of 22uF for calculation,
this is due to derating of ceramic capacitor
F
s=600kHz
These result to:
F
LC=24.6kHz
F
ESR=1MHz
F
s/2=300kHz
Select crossover frequency:
Fo=60kHz
Since: F
LC<Fo<Fs/2<FESR, typeIII method B is
selected to place the pole and zeros.
(
)
s
o
ESR
o
F
1/10
~
1/5
F
and
F
*
≤
<
16
K
4
.
27
R
:
Select
,
K
47
.
27
R
;
R
*
V
R
K
20
.
42
R
:
Select
,
K
76
.
41
R
;
R
F
*
C
*
π
2
1
R
K
24
.
3
R
:
Select
,
K
23
.
3
R
;
F
*
C
*
π
2
1
R
:
R
and
R
,
R
Calculate
nF
22
.
0
C
:
Select
,
nF
22
.
0
C
;
V
*
R
28
.
1
*
V
*
C
*
L
*
F
*
π
2
C
pF
12
C
:
Select
,
pF
8
.
65
C
;
R
*
F
*
π
2
1
C
2.2nF
C
:
Select
1.98nF,
C
;
R
*
F
*
π
2
1
C
:
C
and
C
,
C
Calculate
10K
R
:
Select
;
2K
R
;
g
2
R
F
*
0.5
F
and
F
*
5
.
0
F
:
Select
kHz
224
F
Θ
Sin
1
Θ
Sin
1
*
F
kHz
16
F
Θ
Sin
1
Θ
Sin
1
*
F
9
8
ref
o
ref
9
8
10
2
Z
7
8
10
2
P
7
10
9
8
10
7
in
3
osc
o
7
3
P
3
4
3
Z1
4
7
3
4
3
m
3
s
P3
2
Z
Z1
2
P
o
2
P
2
Z
o
2
Z
=
+
=
+
=
≥
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3629A | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER WITH POWER GOOD OUTPUT |
| IR3629AMPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER WITH POWER GOOD OUTPUT |
| IR3629AMTRPBF | 功能描述:电压模式 PWM 控制器 HI FREQ SYNC PWM 600kHz 5 or 12V 0.6 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| IR3629MPBF | 功能描述:IC CTLR PWM BUCK SYNC 12-MLPD RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| IR3629MTRPBF | 功能描述:电压模式 PWM 控制器 HI FREQ SYNC PWM 600kHz 5 or 12V 0.6 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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