NCP1606
http://onsemi.com
15
Figure 32. Startup Timing Diagram Showing the
Natural Soft Start of the Control Pin
FB
Control
2.5 V
Natural Soft Start
V
CC
I
switch
V
EAL
V
OUT
V
CC(off)
V
CC(on)
OUTPUT DRIVER
The NCP1606 includes a powerful output driver capable
of peak currents of +500 mA and 800 mA. This enables
the controller to efficiently drive power MOSFETs for
medium power (up to 300 W) applications. Additionally,
the driver stage is equipped with both passive and active
pull down clamps (Figure 33). The clamps are active when
V
CC
is off and force the driver output to well below the
threshold voltage of a power MOSFET.
Figure 33. Output Driver Stage and Pull Down Clamps
UVLO
DRV
GND
+
DRV IN
uV
DD
V
CC
V
DD
V
ddGD
V
DD
REG
UVLO
Overvoltage Protection
The low bandwidth of the feedback network makes
active PFC stages very slow systems. One consequence of
this is the risk of huge overshoots in abrupt transient phases
(startup, load steps, etc.). For reliable operation, it is
critical that some form of overvoltage protection (OVP)
effectively prevents the output voltage from rising too
high. The NCP1606 detects these excessive V
OUT
levels
and disables the driver until the output voltage returns to
nominal levels. This keeps the output voltage within an
acceptable range. The limit is adjustable so that the
overvoltage level can be optimally set. The level must not
be so low that it is triggered by the 100 or 120 Hz ripple of
the output voltage. But it must be low enough so as not to
require a larger voltage rating of the output capacitor.
Figure 34 depicts the operation of the OVP circuitry.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
NCP1607BDR2G
IC PFC CONTROLLER CRM 8SOIC
NCP1611BDR2G
IC PFC CTLR HE ENHANCED 8-SOIC
NCP1651DR2G
IC PFC CONTROLLER CCM/DCM 16SOIC
NCP1654BD133R2G
IC PFC CCM 133KHZ 8-SOIC
NCP1927DR2G
IC CTLR PFC/FLYBACK 16-SOIC
NCP380HMU21AATBG
IC CURRENT LIMIT SWITCH 6-UDFN
NCT1008DMT3R2G
TMP DIO MON/SMBUS 4CH 8WDFN
NCT210RQR2G
IC TEMP SENSOR LOC/REM 16QSOP
相关代理商/技术参数
NCP1606BOOSTGEVB
功能描述:电源管理IC开发工具 OSPI NCP1606 100 W BOOST
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
NCP1606BPG
功能描述:功率因数校正 IC LO CST PWR FCTR CONT RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
NCP1607BDR2G
功能描述:功率因数校正 IC CST EFCT PW FCTR CTR RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
NCP1607BOOSTGEVB
功能描述:BOARD EVAL NCP1607 100W BOOST RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板
NCP1608BDR2G
功能描述:功率因数校正 IC COST EFFECT PWR FACT CONT RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
NCP1608BOOSTGEVB
功能描述:电源管理IC开发工具 NCP1608 100 W BOOST EVB PWR SPY
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
NCP1611ADR2G
功能描述:功率因数校正 IC NCP1611A ENHANCED PFC
RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
NCP1611BDR2G
功能描述:功率因数校正 IC NCP1611A ENHANCED PFC RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
