参数资料
| 型号： | NCP5392PMNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 27/32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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页当前第27页第28页第29页第30页第31页第32页
NCP5392P
Actual DCR increases by temperature, the system can be
thermally compensated to cancel this effect to a great
degree by adding an NTC in parallel with R NOR to reduce
the droop gain as the temperature increases. The NTC
device is nonlinear. Putting a resistor in series with the NTC
helps make the device appear more linear with
temperature. The series resistor is split and inserted on both
sides of the NTC to reduce noise injection into the feedback
loop. The recommended total value for R ISO1 plus R ISO2 is
approximately 1.0 k Ω .
The output impedance varies with inductor temperature
by the equation:
Z out (T) =
R FB ? DCR 25C ? (1 + 0.00393 ? (T ? 25)) ? A CSSUM ? A DRP
R DRP
(eq. 15)
By including the NTC R T2 and the series isolation resistors the new equation becomes:
+ R T2)
NOR
ISO1
ISO2
Z out (T) =
R FB ? DCR 25C ? (1 + 0.00393 ? (T ? 25)) ? A CSSUM ? (R
R DRP
R ? (R + R
NOR + R ISO1 + R ISO2 + R T2) ? R SUM
(eq. 16)
The typical equation of an NTC is based on a curve fit
Equation 17
Acssum
Adrp
RNOR
β ? ? 273 + T ? ? ? 298 ? ? (eq. 17)
RT2(T) = RT2 25C ? e
The demo board use a 10 k Ω NTC with a β value of 3740.
Figure 16 shows the comparison of the compensated output
impedance and uncompensated output impedance varying
with temperature.
I1
I2
I3
I4
Ilim
+
RISO1
RSUM
RT2
--
+
RISO2
+
--
OCP
event
0.0013
0.0012
Zout
Zout(uncomp)
+
--
Gain = 2
Imon
0.0011
0.001
Figure 17. IMON Circuit
0.0009
0.0008
0.0007
1.05
0.84
Vimon vs. Iout
0.0006
25
45
65
85
105
0.63
Celsius
Figure 16. Z out vs. Temperature
IMON for Current Monitor
0.42
0.21
Since VDRP signal reflects the current information of all
phases. It can be fed into the IMON amplifier for current
monitoring as shown in Figure 17. IMON amplifier has a
fixed gain of 2 with an offset when VDRP is equal to 1.3 V,
0
0 10 20 30 40 50 60 70 80 90 100
Iout--A
Figure 18. IMON Output vs. Output Current
the internal floating reference voltage. The IMON
amplifier will be saturated at an maximum output of 1.09 V
therefore the total gain of current should be carefully
considered to make the maximum load current indicated by
the IMON output. Figure 18 shows a typical of the relation
between IMON output and the load current.
Power Saving Indicator (PSI) and Phase Shedding
VR11.1 requires the processor to provide an output
signal to the VR controller to indicate when the processor
is in a low power state. NCP5392P use the status of PSI pin
to decide if there is a need to change its operating state to
maximize efficiency at light loads. When PSI = 0, the PSI
function will be enabled, and VR system will be running at
a single phase power saving mode.
The PSI signal will de-- assert 1 m s prior to moving to a
normal power state.
At power saving mode, NCP5392P works with the
NCP5359 driver to represent diode emulation mode at light
load for further power saving.
When system switches on PSI function, a phase shedding
will be presented. Only one or two phases (depending on
http://onsemi.com
27
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| NCP5395GMNR2G | IC PHASE CONTROLLER 2/3/4 48-QFN |
| NCP5395MNR2G | IC PHASE CONTROLLER 2/3/4 48-QFN |
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 |
发布紧急采购，3分钟左右您将得到回复。