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参数资料
| 型号： | IP1201TR |
| 厂商： | International Rectifier |
| 文件页数： | 20/29页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 30A 198BGA |
| 产品变化通告： | (EP) Parts Discontinuation 25/May/2012 |
| 标准包装： | 750 |
| 系列： | iPOWIR™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 3.3 V |
| 输入电压： | 3.14 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 400kHz |
| 电流 - 输出： | 30A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 198-BGA（159 凸块） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | BGA（15.5x9.25） |
| 配用： | IRDCIP1201-A-ND - BUCK CONV REF DESIGN KIT IP1201 |
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iP1201
3. Place a zero at 75% of f LC to cancel one of the LC
filter poles.
Vout1
R26
C22
C9
f z = 0 . 75 ×
2 π
1
L o × C o
(13)
C21
CC1
4. Calculate C 9 using equations (11) and (13)
R25
R9
FB1
iP1201
Calculation of compensation components for out-
put1, based on the example above yields:
f LC = 4.0kHz
f z = 3.0kHz
f 0 = 20kHz (based on F sw = 200kHz)
f esr = 10kHz, per equation (7) using R esr = 11m ? .
R 5 = 4.5K
C 9 = 12nF
R7
C10
Magnitude(dB)
H(s) dB
VREF
E/A1
The same steps can be used to determine the val-
ues of the compensation components for output2.
FZ1
FZ2
FP2
FP3
Frequency
f p 2 ≈
2 π × R 5 × C opt
C opt =
1
2 π × f p 2 × R 5
f z =
2 π × R 25 × C 21
f p 3 ?
(19)
f z 1 =
(20)
1
f z 2
(22)
f 0 =
× V IN × R 26 × C 21 ×
Sometimes, a pole f p2 is added at half the switching
frequency to filter the switching noise. This is done
by adding a capacitor C opt in Fig.20 from the output of
the error amplifier (CC pin of iP1201) to ground. This
pole is given by equation (14):
1
(14)
C opt is found from equation (15) by rearranging the terms
in equation (14) and by setting f p2 = f sw / 2:
(15)
Type III
Type III compensation scheme allows the use of any
type of capacitors with esr frequency of any range. This
scheme suggests a double pole double zero compen-
sation and requires more components around the er-
ror amplifier to achieve the desired gain and phase
margins. Fig. 21 represents the type III compensation
network for iP1201.
The transfer function of the type III compensator is
given by eqaution (16)
Fig. 21: Typical Type III compensation and its gain
plot
The frequencies of the three poles and the two zeros
of the type III compensation scheme are represented
by the following equations:
f p1 = 0 (17)
1
(18)
1
2 π × R 2 6 × C 22
1
2 π × R 26 × C 9
= (21)
2 π × R 9 × C 21
The crossover frequency f 0 for type III compensation is
represented by equation (22):
1 1
V ramp 2 π × L 0 × C 0
Follow the steps below to determine the feedback loop
compensation component values:
H ( s ) ≈
20
1
sR 9 C 9
×
( 1 + sR 26 C 9 ) × ( 1 + sR 9 C 21 )
( 1 + sR 26 C 22 ) × ( 1 + sR 25 C 21 )
(16)
1. Select a zero db crossover frequency f 0 in the range
of 10% to 20% of the switching frequency f sw.
www.irf.com
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相关代理商/技术参数 |
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|---|---|
| IP1201TRPBF | 功能描述:开关变换器、稳压器与控制器 DUAL OUTPUT 2-Phase 3.14 to 5V 400kHz 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 |
| IP1202 | 功能描述:开关变换器、稳压器与控制器 DUAL OUTPUT 2-Phase 5.5V to 13.2V 15A 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 |
| IP1202PBF | 功能描述:开关变换器、稳压器与控制器 DUAL OUTPUT 2-Phase 5.5V to 13.2V 15A 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 |
| IP1202PBF-EL | 制造商:International Rectifier 功能描述: |
| IP1202TR | 功能描述:开关变换器、稳压器与控制器 DUAL OUTPUT 2-Phase 5.5V to 13.2V 15A 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 |
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