收藏本站
NCP3418B
OD
DRVH
or
DRVL
IN
t pdlOD
90%
Figure 2. Output Disable Timing Diagram
t pdhOD
10%
t pdlDRVL
90%
t fDRVL
90%
DRVL
2V
10%
10%
t pdhDRVH
t rDRVH
t pdlDRVH
t fDRVH
t rDRVL
DRVH?SW
90%
90%
10%
2V
10%
t pdhDRVL
SW
Figure 3. Nonoverlap Timing Diagram
APPLICATIONS INFORMATION
Theory of Operation
The NCP3418B is a single phase MOSFET driver designed
for driving two N?channel MOSFETs in a synchronous buck
converter topology. The NCP3418B will operate from 5 V or
12 V, but it has been optimized for high current multi?phase
buck regulators that convert 12 Volt rail directly to the core
voltage required by complex logic chips. A single PWM input
signal is all that is required to properly drive the high?side and
the low?side MOSFETs. Each driver is capable of driving a
3.3 nF load at frequencies up to 500 kHz.
Low?Side Driver
The low?side driver is designed to drive a
ground?referenced low R DS(on) N?Channel MOSFET. The
voltage rail for the low?side driver is internally connected to
the V CC supply and PGND.
High?Side Driver
The high?side driver is designed to drive a floating low
R DS(on) N?channel MOSFET. The gate voltage for the high
side driver is developed by a bootstrap circuit referenced to
Switch Node (SW) pin.
The bootstrap circuit is comprised of an external diode,
and an external bootstrap capacitor. When the NCP3418B is
starting up, the SW pin is at ground, so the bootstrap
capacitor will charge up to V CC through the bootstrap diode
See Figure 4. When the PWM input goes high, the high?side
driver will begin to turn on the high?side MOSFET using the
stored charge of the bootstrap capacitor. As the high?side
MOSFET turns on, the SW pin will rise. When the high?side
MOSFET is fully on, the switch node will be at 12 volts, and
the BST pin will be at 12 volts plus the charge of the
bootstrap capacitor (approaching 24 volts).
The bootstrap capacitor is recharged when the switch
node goes low during the next cycle.
http://onsemi.com
5
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
NCP3418DR2 IC MOSFET DRIVER DUAL 12V 8-SOIC
NCP3420DR2G IC MOSFET DRIVER DUAL 12V 8-SOIC
NCP3488DR2G IC MOSFET DRVR DUAL 12V 8-SOIC
NCP5007SNT1 IC LED DRIVR WHT COMPACT 5TSOP
NCP5008DMR2 IC LED DRVR WHT BCKLT 10MICROSMD
NCP5010FCT1G IC LED DRVR WHT BCKLT 8-FLIPCHIP
NCP5021MUTXG IC WHITE LED DVR HV AMB 16-UQFN
NCP5050MTTXG IC LED DRIVR PHOTO FLASH 10-WDFN
相关代理商/技术参数
NCP3418D 制造商:Rochester Electronics LLC 功能描述:- Bulk
NCP3418DR2 功能描述:IC MOSFET DRIVER DUAL 12V 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:95 系列:- 配置:半桥 输入类型:PWM 延迟时间:25ns 电流 - 峰:1.6A 配置数:1 输出数:2 高端电压 - 最大（自引导启动）:118V 电源电压:9 V ~ 14 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:管件 产品目录页面:1282 (CN2011-ZH PDF) 其它名称:*LM5104M*LM5104M/NOPBLM5104M
NCP3418DR2G 功能描述:功率驱动器IC ANA 12V MOSFET DR 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
NCP3418PDR2 制造商:Rochester Electronics LLC 功能描述:- Bulk
NCP341MUTBG 制造商:ON Semiconductor 功能描述:Controlled Load Switch Soft-Start
NCP3420DR2G 功能描述:功率驱动器IC TSMC 12V FET DRVR 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
NCP3420DR2G-CUT TAPE 制造商:ON 功能描述:NCP Series 1.8 Ohm 13.2 V Surface Mount MOSFET Driver with Dual Outputs - SOIC-8
NCP3420MNR2G 功能描述:功率驱动器IC TSMC 12V FET DRVR 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