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| 型号： | FSFR1800HSL |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC FPS HALF BRIDGE RES CONV 9SIP |
| 标准包装： | 19 |
| 系列： | FPS™ |
| 输出隔离： | 隔离 |
| 频率范围： | 47kHz ~ 53kHz |
| 输入电压： | 9.6 V ~ 25 V |
| 输出电压： | 500V |
| 功率（瓦特）： | 260W |
| 工作温度： | -40°C ~ 130°C |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
C Filter can be used to reduce some noise induced from
transformer or switching transition. Generally, hundreds
Cr
of pico-farad to tens of nano-farad is adequate,
depending on the quantity of noise.
The start and stop input-voltage can be calculated as:
Np
Ns
Ns
V dc ? link , STOP = V LINE ×
R 1 + R 2
[ V ]
R 2
V dc ? link , START = V dc ? link , STOP + I LINE × R 1 [ V ]
(6)
(7)
V CS
CS
Control
IC
SG
PG
I DS
R sense
I DS
V CS
Figure 27. Half-Wave Sensing
I DS
Figure 25. Half-Wave Sensing
V CS
7. Simple Remote-On/Off: The power stage can be
shutdown with optional Auto-Restart Mode, as shown in
Figure 26.
Control
Cr
To configure an external protection with Auto-Restart
Mode, an opto-coupler and the LS pin are used. When
the voltage on the LS pin is pulled below V LINE (2.5 V),
the IC stops during the status holds. However, the opto-
V CS
CS
IC
SG
Np
PG
R sense
Ns
Ns
coupler stops pulling down and the IC can perform the
auto-restart operation itself.
Figure 26. External Protection Circuits
I DS
Figure 28. Full-Wave Sensing
8.2 Capacitive Sensing Method: The drain current
can be sensed using an additional capacitor parallel
with the resonant capacitor, as shown in Figure 29.
During the low-side switch turn on, the current, i CB
through C B , makes V SENSE across R SENSE . The i CB is
scale-down of i p by the impedance ratio of C r and C B .
Generally, 1/100~1/1000 is adequate for the ratio of C B
against C r . R D is used as a damper for reducing noise
generated by switching transition. Several hundreds of
ohm to a few of kilo-ohms can be normally used.
V SENSE can be estimated as;
8. Current-Sensing Methods: FSFR-HS series employs
negative voltage sensing to detect the drain current of
V sense = I Cr
pk
C B
Cr
? R sense [ V ]
(8)
MOSFET, which allows a low-noise resistive sensing
using a filter with low time-constant and capacitive
sensing method.
8.1 Resistive Sensing Method: The IC can sense
drain current as a negative voltage, as shown in Figure
27 and Figure 28. Half-wave sensing allows low power
dissipation in the sensing resistor; while full-wave
sensing has less switching noise in the sensing signal.
For a time constant range for the filter, 3/100~1/10 of
the operating frequency is reasonable.
? 2011 Fairchild Semiconductor Corporation
FSFR1800 / FSFR1700-HS ? Rev.1.0.1
12
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FSFR1800L | 功能描述:功率驱动器IC HIGH 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 |
| FSFR1800S | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FSFR1800US | 功能描述:电源开关 IC - 配电 HIGH POWER FPS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| FSFR1800USL | 功能描述:电源开关 IC - 配电 260W Powr Switch for Half Brdg Res Cnvtr RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| FSFR1800XS | 功能描述:功率驱动器IC 260W Fairchild PwrSW 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 |
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