参数资料
| 型号： | NCP5386BMNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 29/33页 |
| 文件大小： | 0K |
| 描述： | IC CTLR BUCK 1/2PHASE 32-QFN |
| 标准包装： | 2,500 |
| 应用： | 控制器，Intel VR10、VR11、AMD CPU |
| 输入电压： | 4.75 V ~ 5.25 V |
| 输出数： | 2 |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（5x5） |
| 包装： | 带卷 (TR) |
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NCP5386, NCP5386A, NCP5386B
decreases. Use the excel spreadsheet for regulation accuracy
calculations for a specific value of DCR.
Inductor Current Sense Compensation
The NCP5386 uses the inductor current sensing method.
This method uses an RC filter to cancel out the inductance
of the inductor and recover the voltage that is the result of
the current flowing through the inductor ’s DCR. This is
done by matching the RC time constant of the current sense
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.
RSENSE(T) +
L
0.1 · m F · DCR25C · (1 ) 0.00393 · C ? 1 · (T ? 25 · C))
(eq. 8)
The demo board inductor measured 350 nH and
0.75 m W at room temp. The actual value used for R SENSE
was 4.42 k W which matches the equation for R SENSE at
approximately 50 ° C. 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.
Simple Average PSPICE Model
0 GAIN = 6
Figure 31.
E1
+
+
? ?
E
A simple state average model shown in Figure 32 can be
used to determine a stable solution and provide insight into
the control system.
+
2
+
?
+
?
VRamp_min
1.3 V
?
+
V IN
12
0
4
12
0
1
L
(250e ? 9/4)
V off
DCR
(0.85e ? 3/4)
LBRD
1 2
100 p
C Bulk
(560e ? 6*10)
ESR Bulk
(7e ? 3/10)
2
ESL Bulk
(3.5e ? 9/10)
RBRD
0.75 m
C Cer
(22e ? 6*18)
ESR Cer
(1.5e ? 3/18)
2
ESL Cer
(1.5e ? 9/18)
1Aac
0Adc
+
?
I1 = 10
I2 = 110
TD = 10u
TR = 50n
TF = 50n
PW = 40u
PER = 80u
I2
?
RDRP
1
1
CH
5.11 k
0
RF
22 p
CF
4.3 k
1.5 n
CFB1
680 p
RFB1
100
?
1E3
Unity
Gain
BW = 15 MHz R6
C3 1k
10.6 n
0
? +
V off
R FB
1k
1.3
+
?
V offset
0
+
?
+
VDAC
1.25 V
0
V OUT
Figure 32.
http://onsemi.com
29
相关PDF资料 |
PDF描述 |
|---|---|
| NCP5387MNR2G | IC CTLR BUCK 2/3/4PHASE 40-QFN |
| NCP5388MNR2G | IC CTLR BUCK 2/3/4PHASE 40-QFN |
| NCP5389MNR2G | IC CTLR BUCK 2/3PHASE 32-QFN |
| NCP5391MNR2G | IC CTLR BUCK 2/3PHASE 32-QFN |
| NCP5392PMNR2G | IC CTLR BUCK 2/3/4PHASE 40QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5386MNR2G | 功能描述:软开关 PWM 控制器 1/2 PHASE CONTROLLER RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| NCP5386SMNR2G | 制造商:ON Semiconductor 功能描述: |
| NCP5387 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4 Phase Controller for CPU Applications |
| NCP5387MNR2G | 功能描述:软开关 PWM 控制器 2/3/4 PHASE CONTRLER RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| NCP5388 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4 Phase Buck Controller for VR10 and VR11 Pentium IV Processor Applications |
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