参数资料
| 型号： | IR3084AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 30/45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
Over Temperature Setting Resistors R HOTSET1 and R HOTSET2
The threshold voltage of VRHOT comparator is proportional to the die temperature T J (oC) of phase IC.
Determine the relationship between the die temperature of phase IC and the temperature of the power converter
according to the power loss, PCB layout and airflow etc, and then calculate HOTSET threshold voltage
corresponding to the allowed maximum temperature from Equation (21).
V HOTSET ? 4.73*10 ? 3 *T J ? 1.241
(21)
There are two ways to set the over temperature threshold, central setting and local setting. In the central setting,
only one resistor divider is used, and the setting voltage is connected to HOTSET pins of all the phase ICs. To
reduce the influence of noise on the accuracy of over temperature setting, a 0.1uF capacitor should be placed
next to HOTSET pin of each phase IC. In the local setting, a resistor divider per phase is needed, and the setting
voltage is connected to HOTSET pin of each phase. The 0.1uF decoupling capacitor is not necessary. Use
VBIAS as the reference voltage. If R HOTSET1 is pre ? selected, R HOTSET2 can be calculated as follows.
R HOTSET2 ?
R HOTSET1 ? V HOTSET
V BIAS ? V HOTSET
(22)
Phase Delay Timing Resistors R PHASE1 and R PHASE2
The phase delay of the interleaved multiphase converter is programmed by the resistor divider connected at
RMPIN+ or RMPIN ? depending on which slope of the oscillator ramp is used for the phase delay programming of
phase IC, as shown in Figure 4.
If the positive slope is used, RMPIN+ pin of the phase IC should be connected to RMPOUT pin of the control IC
and RMPIN ? pin should be connected to the resistor divider. When RMPOUT voltage is above the trip voltage at
RMPIN ? pin, the PWM latch is set. GATEL becomes low, and GATEH becomes high after the non-overlap time.
If the negative slope is used, RMPIN ? pin of the phase IC should be connected to RMPOUT pin of the control IC
and RMPIN+ pin should be connected to the resistor divider. When RMPOUT voltage is below the trip voltage at
RMPIN ? pin, the PWM latch is set. GATEL becomes low, and GATEH becomes high after the non-overlap time.
It is best to use the VBIAS voltage as the reference for the resistor dividers because the oscillator ramp
magnitude from the control IC will track the VBIAS voltage. It is best to avoid the peak and valley of the oscillator
ramp for better noise immunity. Determine the ratio of the programming resistors corresponding to the desired
switching frequencies and phase numbers. If the resistor R PHASEx1 is pre-selected, the resistor R PHASEx2 is
determined as:
R PHASEx2 ?
RA PHASEx ? R PHASEx1
1 ? RA PHASEx
(23)
Page 30 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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