参数资料
| 型号： | IR3510MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 29/36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
Tor =
C SS * ( VFB ? 1.35)
I CHG
=
C SS * ( VFB ? 1. 35)
70 * 10 ? 6
The VRRDY goes HIGH when the soft-start cap voltage reaches the charge-up comparator threshold, which is
3.7V. The total soft-start time from Enable going HIGH to VRRDY going HIGH is determined by,
Tos =
C SS * 3.7
I CHG
=
C SS * 3.7
70 * 10 ? 6
The soft-start cap can be selected by one of the above equation based on which soft-start time needs to be met.
Input OCP setting resistor
The input current is sensed by a sense resistor placed after and in series with the input FET. The input OCP
setting resistor is connected between the downstream of the input sense resistor and the “ICS-“ pin. A typical
22uA current source flowing out of the “ICS-“ pin goes through Rocset and sets the input current limit threshold
voltage.
Iocset =
Rocset * 22 * 10 ? 6
Rs
The severe OCP threshold voltage is 60mv more than the normal current limit threshold, which gives,
Isevere =
Rocset * 22 * 10 ? 6 + 60 * 10 ? 3
Rs
A 10nF cap Cics is recommended between “ICS+” and “ICS-“ pins and placed close to the IC.
IOCD Cap
The IOCD cap programs the input OCP time-out delay. When the sensed input current reaches the input OCP
threshold, the internal 20uA current source starts charging the IOCD cap, and once the IOCD cap voltage is
charged above 0.85V, which is the time-out comparator threshold, the input FET is latch OFF.
The time-out delay time can be calculated as,
Tocd =
C iocd * 0.85
I CHG
=
C iocd * 0.85
20 * 10 ? 6
Current Error Amplifier Compensation
Average current mode control is used to implement the constant current limit function and keep good current
sharing between modules. One added benefit of using current mode control is that it can eliminate the output
inductor from the voltage loop and make the voltage loop compensation much simple.
The inputs to the current error amplifier are the voltage error amplifier output, which serves as the current
reference signal, and the inductor current sense feedback signal. The open current loop gain is determined by the
PWM gain for the power stage, the output inductor, the output cap and the load resistor. The open current loop
has one output zero made by the output cap and the load resistor, and the L-C double-pole. The output zero
frequency is usually smaller than the L-C resonant frequency Fo, which means the current loop can have enough
phase margin.
Page 29 of 36
IR Confidential
May 18, 2009
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| IR3521MTRPBF | IC CTRL XPHASE3 SVID 32-MLPQ |
| IR3522MTRPBF | IC CTRL XPHASE3 DDR/VVT 32-MLPQ |
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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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