参数资料
| 型号： | FSFR2100USL |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC FPS POWER SWITCH 9-SIP |
| 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）： | 400W |
| 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： | * |
It is typical to set the initial frequency of soft-start two to
three times the resonant frequency ( f O ) of the resonant
network.
The soft-start time is three to four times of the RC time
For the soft-start time, t s/s it can be set as Equation (4).
(a ) (b ) ( a) (b ) (a ) (b )
L V CC
constant. The RC time constant is as follows:
τ = R SS ? C SS
(4)
V AR
V C ssH
V C ssL
I Cr
t stop
t S /S
(a ) P r o te ction s a r e tr igge r e d, ( b ) F S F R- U S r e sta r ts
Figure 21. Self Auto-Restart Operation
5. Protection Circuits : The FSFR-US series has several
self-protective functions, such as Over-Current Protection
(OCP), Abnormal Over-Current Protection (AOCP), Over-
Figure 19. Frequency Sweeping of Soft-Start
4. Self Auto-Restart : The FSFR-US series can restart
automatically even though any built-in protections are
triggered with external supply voltage. As can be seen in
Figure 20 and Figure 21, once any protections are
triggered, M1 switch turns on and V-I converter is
disabled. C SS starts to be discharged until V Css across
C SS drops to V CssL . Then, all protections are reset, M1
turns off, and V-I converter resumes at the same time.
Voltage Protection (OVP), and Thermal Shutdown (TSD).
These protections are auto-restart mode protections as
shown in Figure 22.
Once a fault condition is detected, switching is terminated
and the MOSFETs remain off. When LV CC falls to the LV CC
stop voltage of 10V or AR signal is HIGH, the protection is
reset. The FSFR-US resumes normal operation when
LV CC reaches the start voltage of 12.5V.
The FSFR-US starts switching again with soft-start. If the
protections occur while V Css is under V CssL and V CssH
level, the switching is terminated immediately, V Css
continues to increase until reaching V CssH , then C SS is
discharged by M1.
Figure 22. Protection Blocks
5.1 Over-Current Protection (OCP) : When the
sensing pin voltage drops below -0.58V, OCP is
triggered and the MOSFETs remain off. This protection
has a shutdown time delay of 1.5μs to prevent
premature shutdown during startup.
Figure 20. Internal Block of AR Pin
After protections trigger, FSFR-US is disabled during the
stop-time, t stop , where V Css decreases and reaches to
V CssL . The stop-time of FSFR-US can be estimated as:
5.2 Abnormal Over-Current Protection (AOCP) : If
the secondary rectifier diodes are shorted, large
current with extremely high di/dt can flow through the
MOSFET before OCP is triggered. AOCP is triggered
without shutdown delay when the sensing pin voltage
drops below -0.9V.
t STOP = C SS ? { ( R SS = R MIN ) || 5 k Ω }
? 2009 Fairchild Semiconductor Corporation
FSFR-US Series ? Rev.1.0.2
(5)
11
www.fairchildsemi.com
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相关代理商/技术参数 |
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| FSFR2100XS | 功能描述:开关变换器、稳压器与控制器 FSFR2100U for 400W Power Switch 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 |
| FSFR2100XSL | 功能描述:开关变换器、稳压器与控制器 400W Power Sw for Half-Brdg Res Convtr 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 |
| FSFR502Y | 制造商:Panduit Corp 功能描述:FIBER RISER CABLE, 50UM ZIPCRD 制造商:Panduit Corp 功能描述:FIBER RISER CABLE, 50UM ZIPCRD INTERCONN - Cable Rools/Shrink Tubing |
| FSFR601Y | 制造商:Panduit Corp 功能描述:FIBER RISER CABLE, 62.5UMSMPLX 制造商:Panduit Corp 功能描述:FIBER RISER CABLE, 62.5UMSMPLX INTERCONN - Cable Rools/Shrink Tubing |
| FSFR602Y | 制造商:Panduit Corp 功能描述:FIBER RISER CABLE, 62.5UMZIPCR 制造商:Panduit Corp 功能描述:FIBER RISER CABLE, 62.5UMZIPCRD INTERCON - Cable Rools/Shrink Tubing |
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