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| 型号： | IR3093MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 26/39页 |
| 文件大小： | 0K |
| 描述： | IC CTLR 3PHASE VR10 48-MLQP |
| 标准包装： | 3,000 |
| 应用： | VID 电压编程器 |
| 电源电压： | 7.4 V ~ 21 V |
| 电流 - 电源： | 38mA |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-MLPQ |
| 供应商设备封装： | 48-MLPQ（7x7） |
| 包装： | 带卷 (TR) |
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IR3093PbF
R SET
V BIASOUT V FD
I SETBIAS
(15)
Compensation of the Current Share Loop
The crossover frequency of the current share loop should be at least one decade lower than that of the voltage
loop in order to eliminate the interaction between the two loops. A 22nF capacitor from SCOMP to LGND is good
for most of the applications. If necessary have a 1k resistor in series with the Csc to make the current loop a little
bit faster.
Compensation of Voltage Loop
The adaptive voltage positioning is used in the computer applications to meet the load line requirements. 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 (12) and (13), and the selection of compensation
types depends on the capacitors used. For the applications using Electrolytic, Polymer or AL-Polymer capacitors,
type II compensation shown in Figure 11 (a) is usually enough. While for the applications with only low ESR
ceramic capacitors, type III compensation shown in Figure 11 (b) is preferred.
CCP1
CCP1
VO+
RFB
RCOMP
CCOMP
RCOMP
CCOMP
RFB1
CFB
FB
-
VO+
RFB
FB
-
EAOUT
EAOU T
VDRP
RDRP
VDAC
+
EAOUT
EAOU T
VDRP
RDRP
VDAC
+
CDRP
(a) Type II compensation
(b) Type III compensation
Figure 11 . Voltage loop compensation network
Type II Compensation
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 of the voltage loop can
be estimated by Equations (16), where C E and R CE are the equivalent capacitance and ESR of output capacitors
respectively and R LE is the equivalent resistance of inductor DCR.
2 S * C E ( G CS * R FB R LE R CE )
f C
R DRP
(16)
R COMP and C COMP have limited effect on the crossover frequency, and are used only to fine tune the crossover
frequency and transient load response. Choose the desired crossover frequency fc1 around fc estimated by
Equation (16) and determine R COMP and C COMP.
Page 26 of 39
09/08/05
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3094MPBF | 功能描述:IC REG CTRLR BUCK PWM VM 48MLPQ 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) |
| IR3094MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE VRD10 CTRL IC CTRL IC 200 to 700mV 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 |
| IR3094PBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:3 PHASE PWM CONTROLLER FOR POINT OF LOAD |
| IR30BQ060TR | 制造商:International Rectifier 功能描述: |
| IR3101 | 功能描述:马达/运动/点火控制器和驱动器 Half-Bridge FredFET iMotion 1.6A 500V RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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