参数资料
| 型号： | IR3084AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 16/45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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IR3084A
The IR3084A can accept changes in the VID code while operating and vary the DAC voltage accordingly. The
sink/source capability of the VDAC buffer amp is programmed by the same external resistor that sets the
oscillator frequency. The slew rate of the voltage at the VDAC pin can be adjusted by an external capacitor
between VDAC pin and the VOSNS ? pin. A resistor connected in series with this capacitor is required to
compensate the VDAC buffer amplifier. Digital VID transitions result in a smooth analog transition of the VDAC
voltage and converter output voltage minimizing inrush currents in the input and output capacitors and overshoot
of the output voltage.
Adaptive Voltage Positioning
Adaptive Voltage Positioning (AVP) is needed to reduce the output voltage deviations during load transients and
the power dissipation of the load when it is drawing high current. The circuitry related to the voltage positioning is
shown in Figure 8.
Resistor R SETPT is connected between the VDAC pin and VSETPT pin to set the desired amount of fixed offset
voltage below the DAC voltage. The VSETPT is internally connected to the non ? inverting input of the voltage
error amplifier and an internal current source I OFFSET , whose value is programmed by the same external resistor
that programs the oscillator frequency. The voltage drop across RSETPT caused by I OFFSET sets the no-load l
offset voltage below the nominal DAC setting.
The voltage at the VDRP pin is a buffered version of the share bus and represents the sum of the DAC voltage
and the average inductor current of all the phases. The VDRP pin is connected to the FB pin through the resistor
RDRP. Since the Error Amp will force the loop to maintain FB to be equal to the VSETPT reference voltage, a
current will flow into the FB pin equal to (VDRP ? VSETPT) / R DRP . When the load current increases, the VDRP
voltage increases accordingly. More current flows through the feedback resistor R FB , and makes the output
voltage lower proportional to the load current. The positioning voltage can be programmed by the resistor R DRP
so that the droop impedance produces the desired converter output impedance. The offset and slope of the
converter output impedance are referenced to and therefore independent of the VDAC voltage.
Due to the difference between VDAC and VSETPT, the VDRP will cause extra offset voltage through RDRP and
RFB. The total offset voltage is the sum of voltage across RVSETPT and the voltage drop on the RFB at no load.
Control IC
VDAC
VDAC
Phase IC
VSETPT
EAOUT
RSETPT
ISHARE
VDAC
10k
Current Sense
Amplifier
CSIN+
CSIN-
IOFFSET
Error
Amplifier
VDRP
FB
RFB
RDRP
Vo
Amplifier
VDRP
Phase IC
Current Sense
-
+
IIN
ISHARE
Amplifier
CSIN+
CSIN-
VDAC
10k
Figure 8 ? Adaptive voltage positioning
Page 16 of 45
3/3/2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3084AMTRPBF | 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 |
| IR3084MPBF | 功能描述:IC XPHASE CONTROL 28-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 |
| IR3084MTRPBF | 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 |
| IR3084U | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR10, VR11 & OPTERON/ATHLON64 CONTROL IC |
| IR3084UMPBF | 功能描述:IC XPHASE CONTROL 28-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 |
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