参数资料
| 型号： | IR3084AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 18/45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
Figure 10a depicts the start-up sequence without AVP in Boot Mode (VRM11) ? VIDSEL is either floating or
grounded. First, the VDAC pin is charged to the 1.1V Boot voltage. Then, if there are no fault conditions, the
SS/DEL capacitor will begin to be charged. Initially, the error amplifier’s output will be clamped low until the
voltage at the SS/DEL pin reaches 1.3V. After the voltage at the SS/DEL pin rises to 1.3V, the error amplifier’s
output will begin to rise and the converter’s output voltage will be regulated 1.3V below the voltage at the SS/DEL
pin. The converter’s output voltage will slowly ramp to the 1.1V Boot voltage. The SS/DEL pin’s voltage will
continue to increase until it rises above the 3.1V threshold of the VID delay comparator. When the SS/DEL
voltage exceeds 3.1V, the VID inputs will be sampled and the VDAC pin will transition to the level determined by
the VID inputs at the dynamic VID slew rate. When the voltage on the SS/DEL pin rises above 3.77V the VRRDY
Delay Comparator will allow the VRRDY signal to be asserted. SS/DEL will continue to rise until finally settling at
3.85V, indicating the end of the start-up sequence.
Figure 10b depicts the start-up sequence in Non-Boot Mode ? VIDSEL is connected to VBIAS (6.9V) or to VCC
(12V). First, the external VID setting is sampled and the VDAC pin is set to the desired VID voltage. Then, if
there are no fault conditions, the SS/DEL capacitor will begin to charge. Initially, the error amplifier’s output will
be clamped low until the voltage at the SS/DEL rises to 1.3V. After the voltage at the SS/DEL pin reaches 1.3V,
the error amplifier’s output will begin to rise and the converter’s output voltage will be regulated 1.3V below the
voltage at the SS/DEL pin. As the voltage at the SS/DEL pin continues to rise, the converter’s output voltage will
slowly increase until it is equal to the voltage at the VDAC pin. When the voltage on the SS/DEL pin rises above
3.77V the VRRDY Delay Comparator will allow the VRRDY signal to be asserted. SS/DEL will continue to rise
until finally settling at 3.85V, indicating the end of the start ? up sequence.
If AVP is used (RDRP ≠ ∞ ), the soft start timing will change slightly because of the resistor from the VDRP
amplifier to the Error Amplifier’s FB pin. During startup with AVP, the VDRP amplifier will produce a voltage at
the FB pin equal to VDAC times the resistor divider formed by the droop resistor and the feedback resistor from
Vcore to the FB pin. To offset the contribution from the VDRP amplifier, the voltage at the SS/DEL pin will have
to rise to beyond 1.3V before the Error Amplifier’s output and Vcore begin to rise. For a DAC setting of 1.3V with
typical load line slope, the Error Amplifier’s output will begin to rise when the voltage at the SS/DEL pin reaches
approximately 1.6V. The effect of this offset will be to slightly lengthen the Start Delay (TD1) and shorten the Soft
Start Ramp Time (TD2).
The following table summarizes the differences between the 4 modes associated with setting the VIDSEL pin. In
addition to changing the soft start sequence, the NO_CPU code may or may not be ignored during startup and
the NO_CPU code may or may not be latched.
VIDSEL
Voltage
GND
FLOAT (1.2V)
VBIAS (6.9V)
VCC (12V)
VID
Table
VR10
VR11
VR11
VR10
1.1V Boot
Voltage During
Startup?
YES
YES
NO
NO
Ignore NO CPU
Codes During
Startup?
YES
YES
NO
NO
Latch NO CPU
Fault Code?
YES
YES
NO
NO
Table 3: 3084A Controller Functionality versus VIDSEL Voltages
Page 18 of 45
3/3/2009
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| 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 |
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