参数资料
| 型号： | IR3510MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 30/36页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE CONTROL 32-MLPQ |
| 标准包装： | 100 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 剪切带 (CT) |
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IR3510
In order to eliminate the inductor from the voltage loop, the current loop cross-over frequency needs to be much
higher than the L-C resonant frequency. Meanwhile, it has to be less than 1/5 of the switching frequency. So, the
current loop cross-over frequency can be placed between 3Fo and 1/5Fs.
Typical Type II compensation can be used with the compensation zero placed at the L-C double pole frequency
and high frequency pole placed near the switching frequency. The cross-over frequency determines the middle
frequency gain.
Assuming Lo is the equivalent output inductance for multiple phases, Rpwm and Cpwm set the PWM RAMP with
the phase IC, Fs is the switching frequency, Ki is the current feedback gain which is defined by Vimax/Iomax,
select the current EA compensation gain at the cross-over frequency to be,
Kci =
2 π * Lo * Fci
Gpwm * Ki
where,
Fci is the target current loop cross-over frequency
Gpwm is the PWM gain of the power stage, Gpwm = Rpwm*Cpwm*Fs
Select Rcfb = 1K, then,
Rcc = Kci
(K Ohm)
Ccc = 1/ (2 π *Rcc*Fo)
Ccp = 1/ (2 π *Rcc*Fs)
Voltage Error Amplifier Compensation and Vdroop setting
The inner current loop removes the output inductor from the voltage loop, so the open voltage loop has only one
pole, which is made by the output cap and load resistor, up to the current loop cross-over frequency. To avoid the
interference between the outer voltage loop and the inner current loop, the voltage loop cross-over frequency
should be placed at least 10KHz below the current loop cross-over frequency.
Typical type II compensation can be used with the compensation zero placed at the output pole and the high-
frequency pole placed at the ESR zero of the output cap. The compensation middle-frequency gain determines
the voltage loop cross-over frequency. It can be calculated as follows,
Kcv =
2 π * Co * Ki * Fcv
Kv
where, Fcv is the target voltage loop cross-over frequency
Kv is the voltage feedback gain. Without feedback resistor divider, It’s a unity gain.
Select Rvfb = 1K, then,
Rvc = Kcv
(K Ohm)
Cvc = 1/ (2 π *Rvc*Fo)
Cvcp = 1/ (2 π *Rvc*Fesr)
The Type III compensation is only needed if the voltage loop cross-over frequency has to be greater than the
current loop cross-over frequency in some applications. It can improve the phase margin.
The voltage droop is determined by the voltage error amplifier compensation DC gain, which is set by the
feedback resistor Rdrp across the voltage error amplifier. Rdrp can be calculated as follows,
Page 30 of 36
IR Confidential
May 18, 2009
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PDF描述 |
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| IR3521MTRPBF | IC CTRL XPHASE3 SVID 32-MLPQ |
| IR3522MTRPBF | IC CTRL XPHASE3 DDR/VVT 32-MLPQ |
| IR3523MTRPBF | IC XPHASE3 CTLR VR11.1 40-MLPQ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3510MTRPBF | 功能描述:热插拔功率分布 HOT-SWAP N+1 XPHASE CTRL IC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| IR3513MTRPBF | 功能描述:开关变换器、稳压器与控制器 2 CH OR 2 PHASE SYNC PWM CNTRLR 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 |
| IR3513XMTRPBF | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IR3513Z | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM POL CONTROL IC |
| IR3513ZMPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM POL CONTROL IC |
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