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参数资料
| 型号： | IR3623MPBF |
| 厂商： | International Rectifier |
| 英文描述： | HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING |
| 中文描述： | 高频2相，单或双输出同步降压控制器，输出跟踪和排序 |
| 文件页数： | 17/26页 |
| 文件大小： | 523K |
| 代理商： | IR3623MPBF |
IR3623MPbF
www.irf.com
Application Information
Design Example:
The following example is a typical application for
IR3623. The application circuit is shown in
page24.
Output Voltage Programming
Output voltage is programmed by reference
voltage and external voltage divider. The Fb pin
is the inverting input of the error amplifier, which
is internally referenced to 0.8V. The divider is
ratioed to provide 0.8V at the Fb pin when the
output is at its desired value. The output voltage
is defined by using the following equation:
When an external resistor divider is connected to
the output as shown in figure 17.
Equation (8) can be rewritten as:
For the calculated values of R
5
and R
6
see
feedback compensation section.
kHz
600
F
mV
30
V
A
40
≤
I
V
8
1
V
V
2
13
V
12
.
V
s
o
=
o
o
in
=
=
=
max)
,
.
(
)
8
(
-
-
R
R
1
V
V
5
6
REF
o
+
=
Fig. 17: Typical application of the IR3623 for
programming the output voltage
)
9
(
V
V
V
R
R
ref
o
ref
6
5
=
Soft-Start Programming
The soft-start timing can be programmed by
selecting the soft-start capacitance value. The
start-up time of the converter can be calculated
by using:
T
A
20
C
SS
*
μ
Where T
start
is the desired start-up time (ms)
For a start-up time of 5ms, the soft-start
capacitor will be 0.1uF. Choose a ceramic
capacitor at 0.1uF.
Input Capacitor Selection
The 180
o
out of phase will reduce the RMS value
of the ripple current seen by input capacitors.
This reduces numbers of input capacitors. The
input capacitors must be selected that can
handle both the maximum ripple RMS at highest
ambient temperature as well as the maximum
input voltage. The RMS value of current ripple for
duty cycle under 50% is expressed by:
Where:
-I
RMS
is the RMS value of the input capacitor
current
-D
1
and D
2
are the duty cycle for each channel
-I
1
and I
2
are the output current for each channel
For Io=40A and D=0.13, the I
RMS
= 17.8A.
Ceramic capacitors are recommended due to
their peak current capabilities, they also feature
low ESR and ESL at higher frequency which
enhance better efficiency,
Use 15x22uF, 16V ceramic capacitor from TDK
(C3225X5R1C226M).
For the single output application when the duty
cycle is larger than 50% the following equation
can be used to calculate the total RMS value
input capacitor current:
)
10
(
start
17
Fb1
IR3623
V
OUT
R
5
R
6
(
)
(
)
(
)
)
11
(
D
1
D
I
D
1
D
I
D
1
D
I
I
2
2
1
2
2
2
2
1
1
2
1
RMS
+
=
(
) (
+
)
(
)
0.5
D
D
2
2
D
1
D
2
I
I
O
RMS
>
=
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相关代理商/技术参数 |
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| IR3623MPBF_1 | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING |
| IR3623MTRPBF | 功能描述:开关变换器、稳压器与控制器 HI FREQ 2-PHASE Single or Dual SYNCH RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IR3624MPBF | 功能描述:IC REG CTRLR BUCK PWM VM 10-MLPD RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| IR3624MTRPBF | 功能描述:开关变换器、稳压器与控制器 HI FREQ SYNC PWM 600kHz 5 or 12V 0.6 RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IR3628MPBF | 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) |
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