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参数资料
| 型号： | IP1201PBF |
| 厂商： | International Rectifier |
| 文件页数： | 21/29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： | 10 |
| 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： | 散装 |
| 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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iP1201PbF
Select C22 such that C 22 <<
2.SelectR 26 =~10k?
3. Place the first zero f z1 at 75% of the resonant fre-
quency f LC of the output filter.
Determine C 9 from equation (20).
4. Place a third pole f P3 at or near the switching fre-
quency f SW .
C 9
10
5. Calculate C 21 from equation (22).
case the total amount of capacitance seen by both
channels and the inductance of the voltage control-
ling channel should be considered for compensation.
Current Loop
Use the following procedure for current loop compen-
sation:
In Fig. 22, L 1 and L 2 are the inductors for outputs 1 and
2 respectively. Rsh1 and Rsh2 are the current sensing
shunts for the same outputs.
Vsw1
6. Place the second zero at 125% of the resonant fre-
quency f LC of the output filter. Calculate R 9 using equa-
tion (21).
iP1201PbF
E/A2
Vp-Ref
L1
R sh1
VOUT
7. Place the second pole f p2 at or near f esr of the output
capacitor C o and determine the value of R 25 from equa-
R 9
tion (18). Make sure R 25 <
10
FB2
CC2
C11
R6
R sh2
L2
Vsw2
R Load
R 7 = R 9 ×
8.Useequation(23)tocalculateR 7 .
V ref
V 0 ? V ref
(23)
Fig. 22: Output 2 error amplifier compensation net-
work for parallel configuration.
Resistor R 6 of the compensation network is calculated
according to equation (24)
1 2 π × L 2 × f 02
R eq
f p =
Morethanoneiterationmayberequiredtocalculate
the values of the compensation components if cross-
over frequencies higher than the range specified in
step 1 are required (for higher bandwidths and faster
transient response performance). To ensure stabil-
ity a phase margin greater than 45° should be
achieved.
Refer to AN-1043 for more detailed compensation tech-
niques using Transconductance Amplifiers.
Compensation in Current Share Mode
The iP1201PbF can be configured in single output par-
alleled configuration. The feedback loop of the first out-
put is closed around the output voltage, and the sec-
ond amplifier, which is also a transconductance one,
forces equal sharing of the inductor currents in both
outputs.
R 6 = V ramp × × (24)
g m × R sh 1 V in
The power stage of the current loop has a dominant
pole at frequency expressed by equation (25):
(25)
2 ? π ? L 2
where, R eq represents the total resistance of the power
stage that includes the Rdson of the FET switches,
the DC resistance of the inductor and the shunt resis-
tance, and is expressed by equation (26):
R eq = R dson + R L + R sh (26)
use 10mohm for FET Rdson.
To calculate for C11, place the zero frequency f z at
10 times the dominant pole frequency f p using equa-
tion (27):
C 11 =
VoltageLoop
Type II and Type III methods of voltage loop compen-
sation discussed above, can be used to compensate
the voltage loop of a single output iP1201PbF. In this ,
www.irf.com
f z = 10 × f p
1
2 π × R 6 × f z
Select C 11 ≤ 6 . 8 nf
(27)
21
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相关代理商/技术参数 |
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| IP1201TR | 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 |
| 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: |
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