参数资料
| 型号： | NCP5332ADW |
| 厂商： | ON Semiconductor |
| 文件页数： | 22/30页 |
| 文件大小： | 0K |
| 描述： | IC CTLR BUCK 2PH DRVR/DAC 28SOIC |
| 产品变化通告： | Product Obsolescence 30/Sept/2009 |
| 标准包装： | 26 |
| 应用： | 控制器，高性能处理器 |
| 输入电压： | 4.5 V ~ 14 V |
| 输出数： | 2 |
| 输出电压： | 可调 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC |
| 包装： | 管件 |
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页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页
NCP5332A
L1
0A
R CS1
C CS1
CS1
+
?
G VDRP
Σ
COMP
Error
Amp
+?
VID Setting
IBIAS VFB
R CS2
CS2
+
?
R DRP
V DRP = VID
V FB = VID
R VFBK
V CORE
L2
0A
C CS2
CS REF
G VDRP
I DRP = 0
I FBK = IBIAS VFB
V CORE = VID ? IBIAS VFB w R VFBk
Figure 18. AVP Circuitry at No?Load
RVFBK + D VNO?LOAD IBIASVFB
(29)
(R L ), the PCB trace resistance between the current sense
Resistor R DRP is connected between the V DRP and the
V FB pins. At no?load, the V DRP and the V FB pins will both
points (R PCB ), and the controller IC’s gain from the current
sense to the V DRP pin (G VDRP ):
be at the DAC voltage so this resistor will conduct zero
current. However, at full?load, the voltage at the V DRP pin
will increase proportional to the output inductor ’s current
D VDRP + IO,MAX @ (RL ) RPCB) @ GVDRP
The value of R DRP can then be calculated:
(30)
while V FB will still be regulated to the DAC voltage. Current
will be conducted from V DRP to V FB by R DRP . This current
will be large enough to supply the V FB bias current and cause
a voltage drop from V FB to Vcore across R VFBK – the
RDRP +
D VDRP
( D VOUT,FULL?LOAD RVFBK * IBIASVFB)
(31)
converter ’s output voltage will be reduced. This condition is
shown in Figure 19.
To determine the value of R DRP the designer must specify
the full?load voltage reduction from the VID (DAC) setting
( ? V OUT,FULL?LOAD ) and predict the voltage increase at the
V DRP pin at full?load. Usually, the full?load voltage
reduction is specified in the design guide for the processor
? V OUT,FULL?LOAD is the full?load voltage reduction
from the VID (DAC) setting. ? V OUT,FULL?LOAD is not the
voltage change from the no?load AVP setting.
7. Current Sensing
For inductive current sensing, choose the current sense
that is available from the manufacturer. To predict the
voltage increase at the V DRP pin at full?load ( ? V DRP ), the
designer must consider the output inductor ’s resistance
network (R CSn , C CSn , n = 1 or 2) to satisfy
RCSn @ CCSn + Lo (RL ) RPCB)
(32)
R CS1
L1
I MAX /2
C CS1
CS1
+
?
G VDRP
Σ
COMP
Error
Amp
+?
VID Setting
IBIAS VFB
L2
R CS2
CS2
+
?
G VDRP
R DRP
V DRP = VID + V FB = VID
I MAX ? R L ? G VDRP
R VFBK
V CORE
I MAX /2
C CS2
I DRP
I FBK
CS REF
I DRP = I MAX ? R L ? G VDRP /R DRP
I FBK = I DRP + IBIAS VFB
V CORE = VID ? (I DRP + IBIAS VFB ) w R VFBK
= VID ? I MAX w R L w G VDRP w R VFBK /R DRP ? IBIAS VFB w R VFBK
Figure 19. AVP Circuitry at Full?Load
http://onsemi.com
22
相关PDF资料 |
PDF描述 |
|---|---|
| NCP5378MNR2G | IC CTLR 1PH SYNC BUCK 32QFN |
| NCP5380AMNR2G | IC CTLR SYNC BUCK SGL 32QFN |
| NCP5381AMNR2G | IC BUCK CTLR 2/3/4PHASE 40-QFN |
| NCP5381MNR2G | IC CTLR BUCK 2/3/4PHASE 40-QFN |
| NCP5382MNR2G | IC BUCK CTLR 2-6PHASE 48-QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5332ADWR2 | 功能描述:DC/DC 开关控制器 2 Phase Buck w/Gate 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 |
| NCP5338MNR2G | 制造商:ON Semiconductor 功能描述:INTEGRATED DRIVER AND MOS - Tape and Reel 制造商:ON Semiconductor 功能描述:INTEGRATED DRIVER AND MOS - Cut TR (SOS) 制造商:ON Semiconductor 功能描述:REEL / INTEGRATED DRIVER AND MOS 制造商:ON Semiconductor 功能描述:Integrated Driver and MOSFET |
| NCP5351 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:4 A Synchronous Buck Power MOSFET Driver |
| NCP5351/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:4A Synchronous Buck Power Mosfet Driver |
| NCP5351D | 功能描述:功率驱动器IC 5V 4A Dual MOSFET RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。