参数资料
| 型号： | NCP5392TMNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 22/30页 |
| 文件大小： | 0K |
| 描述： | IC PHASE CONTROLLER 2/3/4 40-QFN |
| 标准包装： | 1 |
| 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： | 标准包装 |
| 其它名称： | NCP5392TMNR2GOSDKR |
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NCP5392T
Final Equations for the Current Limit Threshold
Final equations are described based on two conditions: normal mode and PSI mode.
+ R T2)
NOR
ISO1
ISO2
? DCR 25C (1 + 0.00393 ? (T inductor ? 25))
L ? F SW ? V in
I LIMIT (normal) ?
4 ?
(R
R ? (R + R
NOR + R ISO1 + R ISO2 + R T2) ? R SUM
2V ? R LIM2
R LIM1 + R LIM2
? 0.5 ?
(V in ? N ? V out ) ? V out
(eq. 7)
? COEpsi
+ R T2)
NOR
ISO1
ISO2
? DCR 25C (1 + 0.00393 ? (T inductor ? 25))
I LIMIT (PSI) ?
4 ?
(R
R ? (R + R
NOR + R ISO1 + R ISO2 + R T2) ? R SUM
2V ? R LIM2
R LIM1 + R LIM2
? 0.5 ?
(V in ? V out ) ? V out
L ? F SW ? V in
(eq. 8)
R sense (T) =
N is the number of phases involved in the circuit.
The inductors on the demo board have a DCR at 25 ? C of
0.6 m Ω . Selecting the closest available values of 21.3 k Ω
for R LIM1 and 9.28 k Ω for R LIM2 yields a nominal
operating frequency of 330 kHz. Select R ISO 1 = 1 k, R ISO2
= 1 k, R T2 = 10 K (25 ? C), R NOR /R SUM = 2, (refer to
application diagram). That results to an approximate
current limit of 133 A at 100 ? C for a four phase operation
and 131 A at 25 ? C. The total sensed current can be
observed as a scaled voltage at the VDRP with a positive
no-- load offset of approximately 1.3 V.
Inductor Selection
When using inductor current sensing it is recommended
that the inductor does not saturate by more than 10% at
maximum load. The inductor also must not go into hard
Inductor Current Sensing Compensation
The NCP5392T uses the inductor current sensing
method. An RC filter is selected to cancel out the
impedance from inductor and recover the current
information through the inductor ’s DCR. This is done by
matching the RC time constant of the sensing filter to the
L/DCR time constant. The first cut approach is to use a 0.1
m F capacitor for C and then solve for R.
(eq. 9)
L
0.1 ? m F ? DCR 25C ? (1 + 0.00393(T ? 25))
Because the inductor value is a function of load and
inductor temperature final selection of R is best done
experimentally on the bench by monitoring the V droop pin
and performing a step load test on the actual solution.
saturation before current limit trips. The demo board
includes a four phase output filter using the T44-- 8 core
from Micrometals with 3 turns and a DCR target of 0.6 m Ω
@ 25 ? C. Smaller DCR values can be used, however,
current sharing accuracy and droop accuracy decrease as
DCR decreases. Use the NCP5392T design aide for
regulation accuracy calculations for specific value of DCR.
http://onsemi.com
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相关代理商/技术参数 |
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| NCP5393 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4-Phase Controller for CPU Applications |
| NCP5393A | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4-Phase Controller for CPU Applications |
| NCP5393AMNR2G | 功能描述:IC PHASE CONTROLLER 2/3/4 48-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 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 |
| NCP5393B | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4-Phase Controller for CPU Applications |
| NCP5393BMNR2G | 功能描述:DC/DC 开关控制器 2/3/4 PHASE CONTROL 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 |
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