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| 型号： | FSFR1800HSL |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 11/16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： | * |
The initial maximum frequency can be set up to 600 kHz,
which is given by:
5. Protection Circuits: The FSFR-HS series has several
self-protective functions; such as Over-Current Protection
(OCP), Abnormal Over-Current Protection (AOCP), Over-
f ss =
1
792 p × R min || R SS + 0 . 54 μ
[ Hz ]
(3)
Voltage Protection (OVP), Thermal Shutdown (TSD), and
Line Under-Voltage Lockout (LUVLO or Brownout).
These protections are Auto-Restart Mode protections, as
The soft-start time, t SS , can be calculated by:
t SS = 3 × R SS ? C SS [ s ] (4)
4. Self Auto-Restart: The FSFR-HS series can restart
automatically even though any built-in protections are
triggered in case external supply voltage is applied. As
shown in Figure 22 and Figure 23; once a protection is
triggered, the power MOSFET immediately stops. The
counter starts to operate and 1008-clocks are counted,
then the V-I converter is disabled. C SS starts to be naturally
discharged with the series impedance of R SS and R min until
V RT drops to V RT,RESET , typically 0.1 V. Then, all protections
are reset and the V-I converter resumes. The FSFR-HS
starts switching again with soft-start.
The counter operating time for 1008-clocks after
protection activation is set by the current out of the RT
pin until V RT drops to V RT,RESET . Finally, the stop time of
FSFR-HS can be estimated, without considering the
counter operation time, as:
shown in Figure 24.
Once a fault condition is detected, switching is instantly
terminated and the MOSFETs remain off. When LV CC falls
to the LV CC stop voltage of 10 V and V RT is lower than
V RT,RESET of 0.1 V, the protection is reset. The FSFR-HS
resumes normal operation when LV CC reaches the start
voltage of 12.5 V.
t STOP = 3 C SS ? ( R SS + R min ) [ s ]
Figure 22. Internal Block for Auto-Restart
Figure 23. Self Auto-Restart Operation
? 2011 Fairchild Semiconductor Corporation
FSFR1800 / FSFR1700-HS ? Rev.1.0.1
(5)
11
Figure 24. Protection Blocks
5.1 Over-Current Protection (OCP) : When the
sensing pin voltage drops below -0.58 V and its
duration becomes more than OCP blanking time of
1.5 μs, OCP is triggered and the MOSFETs remain off.
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 if the sensing pin voltage drops
below -0.9 V.
5.3 Over-Voltage Protection (OVP) : When the LV CC
reaches 23 V, OVP is triggered. This protection is used
when auxiliary winding of the transformer supplies V CC
to the FPS?.
5.4 Thermal Shutdown (TSD) : The MOSFETs and
the control IC in one package make it easier for the
control IC to detect the abnormal over-temperature of
the MOSFETs. If the
temperature exceeds
approximately 130 ° C, thermal shutdown triggers.
6. Line Under-Voltage Lockout (UVLO): FSFR-HS
includes precise line UVLO (or brownout) with
programmable hysteresis voltage. This function can start
or restart the IC when V LS for the scale-down voltage of
the DC-link by the sensing resistors, R1 and R2, is higher
than V LINE of 2.5 V as the DC-link voltage increases and
vice versa. A hysteresis voltage between the start and
stop voltage of the IC is programmable by I LINE . In normal
operation, the comparator’s output is HIGH and I LINE is
deactivated so that a voltage on LS pin, V LS, can be
obtained as a divided voltage by R1 and R2. On the
contrary, I LINE is activated when the comparator’s output
is LOW. V LS is generated by the difference between the
current through R1 and I LINE .
www.fairchildsemi.com
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相关代理商/技术参数 |
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|---|---|
| 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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