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| 型号： | FL7930BM |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 18/23页 |
| 文件大小： | 0K |
| 描述： | IC PFC CTLR FLYBACK/BOUND 8SOICN |
| 标准包装： | 95 |
| 类型： | 镇流器控制器 |
| 频率： | 250kHz ~ 350kHz |
| 电流 - 电源： | 2.5mA |
| 电源电压： | 13 V ~ 20 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOP |
| 包装： | 管件 |
PCB Layout Guide
PFC block normally handles high switching current and
the voltage low-energy signal path can be affected by
the high-energy path. Cautious PCB layout is mandatory
for stable operation.
1
The gate drive path should be as short as possible.
The closed-loop that starts from the gate driver,
MOSFET gate, and MOSFET source to ground of
PFC controller should be as close as possible. This
is also crossing point between power ground and
signal ground. Power ground path from the bridge
diode to the output bulk capacitor should be short
and wide. The sharing position between
power
ground and signal ground should be only at one
position to avoid ground loop noise. Signal path of
the PFC controller should be short and wide for
external components to contact.
2
The PFC output voltage sensing resistor is normally
high to reduce current consumption. This path can
be affected by external noise. To reduce noise
potential at the INV pin, a shorter path for output
sensing is recommended. If a shorter path is not
possible, place some dividing resistors between
PFC output and the INV pin — closer to the INV pin
is better. Relative high voltage close to the INV pin
can be helpful.
3
The ZCD path is recommended close to auxiliary
winding from boost inductor and to the ZCD pin. If
5
A stabilizing capacitor for V CC is recommended as
close as possible to the V CC and ground pins. If it is
difficult, place the SMD capacitor as close to the
corresponding pins as possible.
4
that is difficult, place a small capacitor (below
50 pF) to reduce noise.
The switching current sense path should not share
with another path to avoid interference. Some
additional components may be needed to reduce
the noise level applied to the CS pin.
Figure 44.
Recommended PCB Layout
? 2010 Fairchild Semiconductor Corporation
FL7930B ? Rev. 1.0.4
18
www.fairchildsemi.com
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相关代理商/技术参数 |
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|---|---|
| FL7930BMX | 功能描述:功率因数校正 IC PFC Controller for Lighting; 2nd OVP 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 |
| FL7930BMX_G | 制造商:Fairchild Semiconductor Corporation 功能描述: 制造商:Fairchild Semiconductor Corporation 功能描述:IC PFC CTLR FLYBACK/BOUND 8SOIC |
| FL7930CM | 功能描述:功率因数校正 IC PFC Controller for Lighting; PFC Ready 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 |
| FL7930CMX | 功能描述:功率因数校正 IC Single Stage Flyback PFC Controller 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 |
| FL7930CMX_G | 制造商:Fairchild Semiconductor Corporation 功能描述:IC PFC CTLR FLYBACK/BOUND 8SOIC |
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