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参数资料
| 型号： | FSFR1700L |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 12/18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）： | 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 |
Cr
Np
Ns
Ns
Control
IC
V CS
CS
R sense
SG
PG
Ids
I ds
V CS
Figure 24. Half-Wave Sensing
I p
I ds
V Cr
V Crp-p
V CS
V sense pk C B
=
+ C
V Cr sense B
C
V sense
p ? p
V sense pk
2
= V CON
Cr
V CS
CS
Control
IC
Np
Ns
V CON
V sensepk
V sensepk
SG
PG
R sense
Ns
d
T delay = RC d
Ids
Figure 26. Current Sensing Using Resonant
capacitor voltage (V cr ) is proportional to the resonant
current in the primary side (I p ) as:
p ? p I p p ? p
2 π f s C r
Figure 25. Full-Wave Sensing
Current Sensing Using Resonant Capacitor Voltage:
For high-power applications, current sensing using a
resistor may not be available due to the severe power
dissipation in the resistor. In that case, indirect current
sensing using the resonant capacitor voltage can be a
good alternative because the amplitude of the resonant
p-p
p-p
V Cr = (6)
To minimize power dissipation, a capacitive voltage
divider is generally used for capacitor voltage sensing, as
shown in Figure 26.
? 2007 Fairchild Semiconductor Corporation
FSFR series Rev.1.0.9
12
Capacitor Voltage
5. Protection Circuits : The FSFR-series has several
self-protective functions, such as Overload Protection
(OLP), Over-Current Protection (OCP), Abnormal Over-
Current Protection (AOCP), Over-Voltage Protection
(OVP), and Thermal Shutdown (TSD). OLP, OCP, and
OVP are auto-restart mode protections; while AOCP and
TSD are latch-mode protections, as shown in Figure 27.
Auto-restart Mode Protection: 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
11.3V, the protection is reset. The FPS resumes normal
operation when LV CC reaches the start voltage of 14.5V.
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| FSFR1700USL | 功能描述:开关变换器、稳压器与控制器 200W Powr Switch for Half Brdg Res Cnvtr 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 |
| FSFR1700XS | 功能描述:开关变换器、稳压器与控制器 200W 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 |
| FSFR1700XSL | 功能描述:开关变换器、稳压器与控制器 200W Fairchild PwrSW 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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