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参数资料
| 型号： | IR3088AMTR |
| 厂商： | International Rectifier |
| 文件页数： | 18/33页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE W/FAULT DET 20L-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 8.4 V ~ 14 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 供应商设备封装： | 20-MLPQ（4x4） |
| 包装： | 剪切带 (CT) |
| 其它名称： | *IR3088AMTR IR3088AMCT |
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IR3088A
VOLTAGE LOOP COMPENSATION
The adaptive voltage positioning (AVP) is usually adopted in the computer applications to improve the transient
response and reduce the power loss at heavy load. Like current mode control, the adaptive voltage positioning loop
introduces extra zero to the voltage loop and splits the double poles of the power stage, which make the voltage
loop compensation much easier.
Resistors R FB and R DRP are chosen according to Equations (13) and (14), and the selection of compensation types
depends on the output capacitors used in the converter. For the applications using Electrolytic, Polymer or AL-
Polymer capacitors and running at lower frequency, type II compensation shown in Figure 12(a) is usually enough.
While for the applications using only ceramic capacitors and running at higher frequency, type III compensation
shown in Figure 12(b) is preferred.
For applications where AVP is not required, the compensation is the same as for the regular voltage mode control.
For converter using Polymer, AL-Polymer, and ceramic capacitors, which have much higher ESR zero frequency,
type III compensation is required as shown in Figure 12(b) with R DRP and C DRP removed.
CCP1
CCP1
VO+
RFB
RCP
CCP
RCP
CCP
RFB1
CFB
FB
-
VO+
RFB
FB
-
EAOUT
EAOUT
VDRP
RDRP
VDAC
+
EAOUT
EAOUT
VDRP
RDRP
VDAC
+
CDRP
(a) Type II compensation
(b) Type III compensation
Figure 12. Voltage loop compensation network
Type II Compensation for AVP Applications
Determine the compensation at no load, the worst case condition. Choose the crossover frequency fc between 1/10
and 1/5 of the switching frequency per phase. Assume the time constant of the resistor and capacitor across the
output inductors matches that of the inductor, and determine R CP and C CP from Equations (25) and (26), where L E
and C E are the equivalent inductance of output inductors and the equivalent capacitance of output capacitors
respectively.
R CP =
C CP =
( 2 π ? f C ) 2 ? L E ? C E ? R FB ? V PWMRMP
V O * 1 + ( 2 π * f C * C * R C ) 2
10 ? L E ? C E
R CP
(25)
(26)
C CP1 is optional and may be needed in some applications to reduce the jitter caused by the high frequency noise. A
ceramic capacitor between 10pF and 220pF is usually enough.
Type III Compensation for AVP Applications
Determine the compensation at no load, the worst case condition. Assume the time constant of the resistor and
capacitor across the output inductors matches that of the inductor, the crossover frequency and phase margin of the
voltage loop can be estimated by Equations (27) and (28), where R LE is the equivalent resistance of inductor DCR.
Page 18 of 33
1/15 /05
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| IR3088AMTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE IC W/ FAULT OVERTEMP DETECT 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 |
| IR3088APBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
| IR3088M | 功能描述:IC XPHASE W/FAULT DET 20L-MLPQ RoHS:否 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| IR3088MPBF | 功能描述:IC CONTROLLER PHASE 20L-MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| IR3088MTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE PHASE IC WITH FAULT AND OVERTEMP DETECT |
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