参数资料
| 型号： | NCP5214AMNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 22/31页 |
| 文件大小： | 0K |
| 描述： | IC CTLR NOTEBOOK DDR PWR 22-DFN |
| 产品变化通告： | Product Discontinuation 01/Oct/2008 |
| 标准包装： | 2,500 |
| 应用： | 控制器，DDR |
| 输入电压： | 4.5 V ~ 24 V |
| 输出数： | 2 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 22-VFDFN 裸露焊盘 |
| 供应商设备封装： | 22-DFN（6x5） |
| 包装： | 带卷 (TR) |
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NCP5214A
frequency at which the gain is 0 dB and the phase margin
is the difference between the close loop phase and 180 ° .
The goal of compensation is to achieve a stable close loop
system with the highest possible bandwidth, the gain
sufficient phase margin for stability. The bandwidth of
close loop gain should be less than 50% of the switching
frequency and the compensation gain should be bounded
by the error amplifier open loop gain.
having ?20 dB/decade slope at 0 dB gain crossing, and
VIN
NCP5214A
CIN
VBOOST
Q1
TGDDQ
L
VDDQ
VDDQ
PWM
LOGIC
VCCP
SWDDQ
Q2
ESR
PGND
BGDDQ
COUT
OUTPUT
FILTER
PGND
OSC
PWM
COMP
COMP
VIN
ADAPTIVE VRAMP
RAMP
ERROR
AMP
A
VREF
C2
R3
C1
C3
R4
R1
COMPENSATION
NETWORK
FBDDQ
MODULATOR
R2
Figure 39. Voltage Mode Buck Converter with Modulator, LC filter and Type III Compensation
Modulator DC Gain can be calculated by:
Type III compensation poles and zeros break frequencies
GMOD(DC) + 20 log
VIN
fZ1 +
(eq. 20)
VRAMP
LC filter double pole and ESR zero break frequencies are
are defined by the below equations:
1
2 p R3
C2
(eq. 24)
fPLC +
fZESR +
1
2 p
fP1 +
2 p
R3
fZ2 +
fP2 +
GCOMP(DC) + 20 log 3
defined by:
1
(eq. 21)
2 p L COUT
(eq. 22)
ESR COUT
Compensation network DC Gain can be calculated by the
equation:
R
(eq. 23)
R1
100
f Z1
2 p (R1 ) R4) C3
2 p R4 C3
1
1
1
C1 C2
C1 ) C2
(eq. 25)
(eq. 26)
(eq. 27)
80
60
40
20
f Z2
f P1
f P2
Open Loop Error
Amp Gain
Compensation
Gain
0
?20
?40
20 log
20 log
R3
R1
VIN
VRAMP
f ZESR
f PLC
Closed Loop Gain
Modulator & Filter Gain
?60
10
100
1k
10 k 100 k 1 M
10 M
FREQUENCY (Hz)
Figure 40. Asymptotic Bode Plot of the Converter Gain
http://onsemi.com
22
相关PDF资料 |
PDF描述 |
|---|---|
| NCP5214MNR2G | IC CTLR NOTEBOOK DDR PWR 22-DFN |
| NCP5215MNR2G | IC CTLR SYNC BUCK DUAL 40-QFN |
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| NCP5218MNR2G | IC DDR PWR CTLR 2IN2 NTBK 22-DFN |
| NCP5220MNR2G | IC CTLR PWM DUAL BUCK PWR 20-DFN |
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| NCP5214EVB | 功能描述:电源管理IC开发工具 ANA NCP5214 EVAL BRD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP5214MNR2 | 功能描述:DC/DC 开关控制器 2-IN-1 NOTBOOK DDR CNTLR 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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