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| 型号： | FSFR1700 |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC SWIT PROG OVP OCP 9SIP |
| 标准包装： | 19 |
| 系列： | FPS™ |
| 输出隔离： | 隔离 |
| 频率范围： | 94kHz ~ 106kHz |
| 输入电压： | 9.6 V ~ 25 V |
| 输出电压： | 500V |
| 功率（瓦特）： | 200W |
| 工作温度： | -40°C ~ 130°C |
| 封装/外壳： | 9-SIP |
| 供应商设备封装： | 9-SIP |
| 包装： | 管件 |
| 产品目录页面： | 1219 (CN2011-ZH PDF) |
3 ms to reduce the current overshoot during the initial
cycles, which adds 40 kHz to the initial frequency of the
external soft-start circuit, as shown in Figure 20. The
initial frequency of the soft-start is given as:
f ISS ? (
5.2 k ?
R min
?
5.2 k ?
R SS
) ? 100 ? 40 ( kHz )
(3)
It is typical to set the initial frequency of soft-start two ~
three times the resonant frequency ( f O ) of the resonant
network.
The soft-start time is three to four times of the RC time
constant. The RC time constant is as follows:
T SS ? R SS ? C SS
f s
(4)
Figure 22. Control Pin Configuration for Pulse
Skipping
f ISS
40kHz
Control loop
take over
Remote On / Off : When an auxiliary power supply is
used for standby, the main power stage using FSFR2100
can be shut down by pulling down the control pin voltage,
as shown in Figure 23. R1 and C1 are used to ensure
soft-start when switching resumes.
time
Figure 20. Frequency Sweeping of Soft-start
4. Control Pin
The FSFR2100 has a control pin for protection, cycle
skipping, and remote on/off. Figure 21 shows the internal
block diagram for control pin.
Figure 23. Remote On / Off Circuit
Figure 21. Internal Block of Control Pin
Protection : When the control pin voltage exceeds 5V,
protection is triggered. Detailed applications are
described in the protection section.
Pulse Skipping : FSFR2100 stops switching when the
control pin voltage drops below 0.4 V and resumes
switching when the control pin voltage rises above 0.6 V.
To use pulse-skipping, the control pin should be
connected to the opto-coupler collector pin. The
frequency that causes pulse skipping is given as:
SKIP
?
5 . 2 k
R min
?
4 . 16 k
R max
x 100 ? kHz ?
(5)
? 2010 Fairchild Semiconductor Corporation
FSFR2100 ? Rev.1.1.0
10
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FSFR1700HS | 功能描述:功率驱动器IC HI 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 |
| FSFR1700HSL | 功能描述:功率驱动器IC HI 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 |
| FSFR1700L | 功能描述:开关变换器、稳压器与控制器 Pwr Switch for Half- Brdg Resonant Cnvrtr RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| FSFR1700S | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FSFR1700US | 功能描述:开关变换器、稳压器与控制器 HIGH POWER FPS RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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