- 您现在的位置：买卖IC网 > PDF目录1794 > FSQ0565RQLDTU (Fairchild Semiconductor)IC PWM/SENSEFET QRC TO-220F-6L PDF资料下载
参数资料
| 型号： | FSQ0565RQLDTU |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 15/23页 |
| 文件大小： | 0K |
| 描述： | IC PWM/SENSEFET QRC TO-220F-6L |
| 产品变化通告： | Product Discontinuation 14/Mar/2011 |
| 标准包装： | 400 |
| 系列： | FPS™ |
| 输出隔离： | 隔离 |
| 频率范围： | 48kHz ~ 67kHz |
| 输入电压： | 9 V ~ 20 V |
| 输出电压： | 650V |
| 功率（瓦特）： | 80W |
| 工作温度： | -25°C ~ 85°C |
| 封装/外壳： | TO-220-6 全封装，成形引线 |
| 供应商设备封装： | TO-220-6L（成形） |
| 包装： | 管件 |
FSQ-series uses V CC instead of directly monitoring the
output voltage. If V CC exceeds 19V, an OVP circuit is
activated, resulting in the termination of the switching
operation. To avoid undesired activation of OVP during
exceeds approximately 140°C, the thermal shutdown
triggers IC shutdown. The IC resumes operation when
the junction temperature decreases 60°C from TSD
temperature and V CC reaches startup voltage (V start ).
normal operation, V CC should be designed below 19V.
5. Soft-Start: The FPS has an internal soft-start circuit
4.4.2 Sync Over-Voltage Protection (OVP) of
FSQ0565RQ: If the secondary-side feedback circuit
malfunctions or a solder defect causes an opening in the
feedback path, the current through the opto-coupler
transistor becomes almost zero. V FB climbs up in a
similar manner to the overload situation, forcing the
preset maximum current to be supplied to the SMPS
until the overload protection triggers. Because more
energy than required is provided to the output, the output
voltage may exceed the rated voltage before the
overload protection triggers, resulting in the breakdown
of the devices in the secondary side. To prevent this
situation, an OVP circuit is employed. In general, the
peak voltage of the sync signal is proportional to the
output voltage and the FSQ-series uses a sync signal
instead of directly monitoring the output voltage. If the
sync signal exceeds 8V, an OVP is triggered, shutting
down the SMPS. To avoid undesired triggering of OVP
during normal operation, two points are considered, as
depicted in Figure 33. The peak voltage of the sync
signal should be designed below 6V and the spike of the
SYNC pin must be as low as possible to avoid getting
longer than t OVP by decreasing the leakage inductance
shown at V CC winding coil.
that increases PWM comparator inverting input voltage
with the SenseFET current slowly after it starts. The
typical soft-start time is 17.5ms. The pulse width to the
power switching device is progressively increased to
establish the correct working conditions for transformers,
inductors, and capacitors. The voltage on the output
capacitors is progressively increased with the intention of
smoothly establishing the required output voltage. This
mode helps prevent transformer saturation and reduces
stress on the secondary diode during startup.
6. Burst Operation: To minimize power dissipation in
standby mode, the FPS enters burst-mode operation. As
the load decreases, the feedback voltage decreases. As
shown in Figure 34, the device automatically enters
burst-mode when the feedback voltage drops below
V BURL (350mV). At this point, switching stops and the
output voltages start to drop at a rate dependent on
standby current load. This causes the feedback voltage
to rise. Once it passes V BURH (550mV), switching
resumes. The feedback voltage then falls and the
process repeats. Burst-mode operation alternately
enables and disables switching of the power SenseFET,
thereby reducing switching loss in standby mode.
V Vcc_coil & V CC
V CC
Absolue max V CC (20V)
V Vcc_coil
FSQ0565RQ Rev.00
V O
Vo set
V FB
0.55V
V sync
Improper OVP triggering
V OVP (8V)
V SH2 (4.8V)
t OVP
V DC
N pri
N Vcc
0.35V
I DS
t OVP
V DS
V CLAMP
Figure 33. OVP Triggering of FSQ0565RQ
FSQ0565 Rev. 00
time
4.5 Thermal Shutdown with Hysteresis (TSD): The
t1
Switching
disabled
t2
t3
Switching
disabled
t4
SenseFET and the control IC are built in one package.
This enables the control IC to detect the abnormally high
temperature of the SenseFET. If the temperature
? 2008 Fairchild Semiconductor Corporation
FSQ0565RS/RQ Rev. 1.0.3
15
Figure 34. Waveforms of Burst Operation
www.fairchildsemi.com
相关PDF资料 |
PDF描述 |
|---|---|
| FSQ0565RSLDTU | IC PWM/SENSEFET QRC TO-220F-6L |
| FSQ0765RQUDTU | IC CONV QUASI-RES 650V TO-220F-6 |
| FSQ0765RSLDTU | IC PWM/SENSEFET QRC TO-220F-6L |
| FSQ100 | IC SWIT PWM GREEN OVP HV 8DIP |
| FSQ110 | IC SWIT PWM GREEN CM OVP 8DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FSQ0565RQWDTU | 功能描述:电源开关 IC - 配电 Power Switch 6-Pin 6+Tab 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 |
| FSQ0565RSLDTU | 功能描述:开关变换器、稳压器与控制器 SMPS Power switch (QRC) 5A 650V 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 |
| FSQ0565RSWDTU | 功能描述:电源开关 IC - 配电 Power Switch 6-Pin 6+Tab 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 |
| FSQ0565RWDTU | 功能描述:交流/直流开关转换器 SMPS Power switch 5A 650V RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| FSQ05A03L | 制造商:NIEC 制造商全称:Nihon Inter Electronics Corporation 功能描述:Schottky Barrier Diode |
发布紧急采购，3分钟左右您将得到回复。