参数资料
| 型号： | NCP5392PMNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 23/32页 |
| 文件大小： | 0K |
| 描述： | IC CTLR BUCK 2/3/4PHASE 40QFN |
| 标准包装： | 2,500 |
| 应用： | 控制器，Intel VR11，VR11.1，AMD CPU |
| 输入电压： | 4.75 V ~ 5.25 V |
| 输出数： | 4 |
| 输出电压： | 0.375 V ~ 1.6 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘 |
| 供应商设备封装： | 40-QFN（6x6） |
| 包装： | 带卷 (TR) |
| 其它名称： | NCP5392PMNR2G-ND NCP5392PMNR2GOSTR |
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NCP5392P
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The current limit function is based on the total sensed
current of all phases multiplied by a controlled gain
(Acssum*Adrp). DCR sensed inductor current is a function
of the winding temperature. The best approach is to set the
maximum current limit based on expected average
maximum temperature of the inductor windings,
DCR Tmax = DCR 25C (1 + 0.00393 ? (T max ? 25)) (eq. 2)
0
100
Calculation
Real
Freq--kHz
1000
Figure 11. ROSC vs. Frequency
For multiphase controller, the ripple current can be calculated as,
Ipp =
(V in ? N ? V out ) ? V out
L ? F SW ? V in
(eq. 3)
Therefore calculate the current limit voltage as below,
? ?
V LIMIT ? A CSSUM ? A DRP ? DCR Tmax ? I MIN_OCP ? + 0.5 ?
V LIMIT ? A CSSUM ? A DRP ? DCR Tmax ? (I MIN_OCP ? + 0.5 ? Ipp)
(V in ? N ? V out ) ? V out
L ? F SW ? V in
In Equation 4, A CSSUM and A DRP are the gain of current summing amplifier and droop amplifier.
(eq. 4)
I1
I2
I3
I4
Ilim
Acssum Adrp
RNOR
RISO1 RISO2
RT2
+ --
RSUM +
+
--
Figure 12. ACSSUM and ADRP
OCP
event
R ISO1 and R ISO2 are in series with R T2 , the NTC
temperature sense resistor placed near inductor. R SUM is
the resistor connecting between pin VDFB and pin
CSSUM. If PSI = 1, PSI function is off, the current limit
follows the Equation 7; if PSI = 0, the power saving mode
will be enabled, COEpsi is a coefficient for the current
limiting related with power saving function (PSI), the
current limit can be calculated from Equation 8. COEpsi
value is one over the original phase count N. Refer to the
PSI and phase shedding section for more details.
As introduced before, V LIMIT comes from a resistor
divider connected to Rosc pin, thus,
V LIMIT = 2 V ?
R LIM2
R LIM1 + R LIM2
? COEpsi
(eq. 5)
A CSSUM = ? 4
A DRP = ?
R NOR ? (R ISO1 + R ISO2 + R T2 )
(R NOR + R ISO1 + R ISO2 + R T2 ) ? R SUM
(eq. 6)
http://onsemi.com
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相关PDF资料 |
PDF描述 |
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| NCP5392QMNR2G | IC PHASE CONTROLLER 2/3/4 40-QFN |
| NCP5392TMNR2G | IC PHASE CONTROLLER 2/3/4 40-QFN |
| NCP5393BMNR2G | IC CTLR 2/3/4PHASE CPU 48QFN |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5392Q | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4-Phase Controller for CPU Applications |
| NCP5392QMNR2G | 功能描述:DC/DC 开关控制器 2/3/4 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP5392T | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4-Phase Controller with Light Load Power Saving Enhancement for CPU Applications |
| NCP5392TMNR2G | 功能描述:DC/DC 开关控制器 2/3/4 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP5393 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4-Phase Controller for CPU Applications |
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