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参数资料
| 型号： | FAN7621BSJX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 13/17页 |
| 文件大小： | 0K |
| 描述： | IC OFF-LINE CTRLR PROG PFM 16SOP |
| 标准包装： | 2,000 |
| 输出隔离： | 隔离 |
| 频率范围： | 94kHz ~ 106kHz |
| 功率（瓦特）： | 1.13W |
| 工作温度： | -40°C ~ 130°C |
| 封装/外壳： | 16-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 16-SOP |
| 包装： | 带卷 (TR) |
6. PCB Layout Guideline : Duty imbalance problems
may occur due to the radiated noise from main
transformer, the inequality of the secondary-side leakage
inductances of main transformer, and so on. Among
them, it is one of the dominant reasons that the control
components in the vicinity of R T pin are enclosed by the
primary current flow pattern on PCB layout. The direction
of the magnetic field on the components caused by the
primary current flow is changed when the high-and-low
side MOSFET turns on by turns. The magnetic fields with
opposite direction from each other induce a current
through, into, or out of the R T pin, which makes the turn-
on duration of each MOSFET different. It is strongly
recommended to separate the control components in the
vicinity of R T pin from the primary current flow pattern on
PCB layout. Figure 28 shows an example for the duty-
balanced case. The yellow and blue lines show the
primary current flows when the lower-side and higher-
side MOSFETs turns on, respectively. The primary
current does not enclose any component of controller.
In addition, it is helpful to reduce the duty imbalance to
make the loop configured between CON pin and opto-
coupler as small as possible, as shown in the red line in
Figure 28.
Figure 28. Example for Duty Balancing
? 2009 Fairchild Semiconductor Corporation
FAN7621B ? Rev. 1.0.1
13
www.fairchildsemi.com
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相关代理商/技术参数 |
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| FAN7621MX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Controller for Half-Bridge Resonant Converters |
| FAN7621N | 功能描述:功率驱动器IC Control IC of High Power FPS 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 |
| FAN7621S | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:PFM Controller for Half-Bridge Resonant Converters |
| FAN7621SJ | 功能描述:功率驱动器IC PWM Control IC for High Power FPS 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 |
| FAN7621SJX | 功能描述:功率驱动器IC PWM Control IC for High Power FPS 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 |
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