参数资料
| 型号： | IR3084AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 25/45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
DESIGN PROCEDURES – IR3084A and IR3086A Chipset
IR3084A EXTERNAL COMPONENTS
Oscillator Resistor Rosc
The oscillator of IR3084A generates a triangle waveform to synchronize the phase ICs, and the switching
frequency of the each phase converter equals the oscillator frequency, which is set by the external resistor R OSC
according to the curve in Figure 13 on page 23.
VDAC Slew Rate Programming Capacitor C VDAC and Resistor R VDAC
The sink and source currents of the VDAC pin are set by the value of R OSC . The sink current capability of the
VDAC pin is slightly less than the source current. Therefore, the VDAC sink current (I SINK ) should be used to
calculate C VDAC to insure that the dynamic VID slew rate when Vcore decreases is not too slow.
The negative slew rate of VDAC (SR DOWN ) is programmed by the external capacitor C VDAC as shown in Equation
(1). The resistor R VDAC is used to compensate/stabilize the VDAC circuit and is determined by Equation (2). The
positive slew rate of the VDAC voltage (SR UP ) is proportional to the negative slew rate of VDAC and can be
calculated using Equation (3).
C VDAC ?
I SINK
SR DOWN
(1)
Where: I SINK is the sink current of the VDAC pin at the chosen value of R OSC as shown in Figure 17 on
page 23.
C VDAC
R VDAC ? 0 . 5 ? ?
3 . 2 ? 10 ? 15
2
(2)
SR UP ?
I SOURCE
C VDAC
(3)
Where: I SOURCE is the source current of the VDAC pin at the chosen value of R OSC as shown in Figure 17
on page 23.
The VID voltage rise or fall time during startup with Boot Mode (TD4) can be calculated using either Equation
(4a) or (4b).
TD 4 ?
C VDAC
I SOURCE
? ? VDAC ? 1 . 1 V ?
if VDAC > 1.1V
(4a)
TD 4 ?
C VDAC
I SINK
? ? 1 . 1 V ? VDAC ?
if VDAC < 1.1V
(4b)
Where: VDAC is the DAC voltage set by the VID pins.
I SOURCE and I SINK are the source and sink currents of the VDAC pin.
If Boot Mode is not used then TD4 = 0.
Page 25 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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