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| 型号： | FAN7621SSJ |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 11/13页 |
| 文件大小： | 0K |
| 描述： | IC OFF-LINE CTRLR PROG PFM 16SOP |
| 标准包装： | 47 |
| 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： | 管件 |
6. Current Sensing Using Resistor: FAN7621S senses
drain current as a negative voltage, as shown in Figure
23 and Figure 24. Half-wave sensing allows low power
dissipation in the sensing resistor, while full-wave
sensing has less switching noise in the sensing signal.
7. PCB Layout Guidelines : Duty imbalance problems
may occur due to the radiated noise from the main
transformer, the inequality of the secondary-side leakage
inductances of main transformer, and so on. 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. Error!
Reference source not found. 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 turn on, respectively. The primary current
does not enclose any component of controller.
Figure 23. Half-Wave Sensing
Figure 24. Full-Wave Sensing
Figure 25. Example for Duty Balancing
? 2009 Fairchild Semiconductor Corporation
FAN7621S ? Rev. 1.0.1
11
www.fairchildsemi.com
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| FAN7621SSJX | 功能描述:电流型 PWM 控制器 CONTROL IC OF FPS RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| FAN7631 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:半桥谐振变换器用高级脉频调制（PFM）控制器 |
| FAN7631SJ | 功能描述:功率驱动器IC CONTROL IC OF 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 |
| FAN7631SJX | 功能描述:功率驱动器IC CONTROL IC OF 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 |
| FAN7680 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:PC Power Supply Outputs Monitoring IC |
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