参数资料
| 型号： | IR3084UMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 19/47页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE CONTROL 28-MLPQ |
| 标准包装： | 100 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 14mA |
| 电源电压： | 9.5 V ~ 16 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-MLPQ |
| 供应商设备封装： | 28-MLPQ（5x5） |
| 包装： | 剪切带 (CT) |
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IR3084U
Inductor DCR Temperature Correction
If the thermal compensation of the inductor DCR provided by the temperature dependent gain of the current
sense amplifier is not adequate, a negative temperature coefficient (NTC) thermistor can be used for additional
correction. The thermistor should be placed close to the inductor and connected in parallel with the feedback
resistor, as shown in Figure 9. The resistor in series with the thermistor is used to reduce the nonlinearity of the
thermistor.
Control IC
VDAC
RSETPT
VSETPT
EAOUT
RFB
V o
IOFFSET
Error
Amplifier
AVP
Amplifier
VDRP
RFB2
RDRP
Rt
-
+
IIN
Figure 9 - Temperature compensation of inductor DCR
Remote Voltage Sensing
To compensate for impedance in the ground plane, the VOSNS? pin is used for remote ground sensing and
connects directly to the load. The VDAC voltage is referenced to VOSNS? to avoid additional error terms or
delays related to a separate differential amplifier. The capacitor connecting the VDAC and VOSNS? pins ensure
that high speed transients are fed directly into the error amp without delay.
Start-up Modes
The IR3084U has a programmable soft-start function to limit the surge current during converter start-up. A
capacitor connected between the SS/DEL and LGND pins controls soft start timing, over-current protection delay,
and hiccup mode timing. A charge current of 70μA controls the positive slope of the voltage at the SS/DEL pin.
There are two types of start-up possible: VR11 and Opteron/Athlon64. In VR11 mode, the soft start circuitry will
set the voltage at the VDAC pin to the 1.1V Boot voltage and the converter’s output will slowly rise using the slew
rate set by the capacitor at the SS/DEL pin until it’s equal to the VDAC voltage. After Vcore reaches the 1.1V
Boot voltage there will be a short delay, the VID pins will be sampled, and the voltage at the VDAC pin and the
converter’s output will increase or decrease to the desired VID setting using the dynamic VID slew rate. In
Opteron/Athlon64 mode, the soft start sequence will ramp the voltage at the VDAC pin directly to the external VID
setting using the slew rate set by the capacitor at the SS/DEL pin without pausing at the 1.1V Boot voltage.
Page 19 of 47
June 1, 2009
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PDF描述 |
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| IR3087MPBF | IC XPHASE W/OVP/TM CTRL 20MLPQ |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3084UMTRPBF | 功能描述:开关变换器、稳压器与控制器 VR10 VR11 Athlon64 XPHASE CTRL IC 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 |
| IR3086 | 制造商:IRF 制造商全称:International Rectifier 功能描述:PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT |
| IR3086A | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT |
| IR3086AM | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT |
| IR3086AMPBF | 功能描述:IC PHASE CONTROLLER OVP 20MLPQ 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 |
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