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参数资料
| 型号： | FSCQ0565RTYDTU |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 13/36页 |
| 文件大小： | 0K |
| 描述： | IC SWIT PWM GREEN OVP HV TO220F |
| 标准包装： | 400 |
| 输出隔离： | 隔离 |
| 频率范围： | 18kHz ~ 22kHz |
| 输入电压： | 9 V ~ 20 V |
| 输出电压： | 650V |
| 功率（瓦特）： | 70W |
| 工作温度： | 25°C ~ 150°C |
| 封装/外壳： | TO-220-5 全封装（成形引线） |
| 供应商设备封装： | TO-220F-4L |
| 包装： | 管件 |
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Functional Description
1. Startup: Figure 25 shows the typical startup circuit
and the transformer auxiliary winding for the FSCQ
series. Before the FSCQ series begins switching, it
The minimum average of the current supplied from the
AC is given by:
? ?
? START
?
? ? R
?
consumes only startup current (typically 25 μA). The
current supplied from the AC line charges the external
capacitor (C a1 ) that is connected to the V CC pin. When
V CC reaches the start voltage of 15 V (V START ), the
I SUP
AVG
?
? 2 ? V MIN
AC
? ?
?
V
2
?
? STR
1
(1)
where V ac
is the minimum input voltage, V START is
so that I sup
is larger than the maximum startup
FSCQ series begins switching and its current
consumption increases to I OP . Then, the FSCQ series
continues normal switching operation and the power
required is supplied from the transformer auxiliary
winding, unless V CC drops below the stop voltage of 9 V
(V STOP ). To guarantee stable operation of the control IC,
V CC has under-voltage lockout (UVLO) with 6 V
hysteresis. Figure 26 shows the relationship between
min
the FSCQ series ’ start voltage (15 V), and R str is the
startup resistor. The startup resistor should be chosen
avg
current (50 μA).
Once the resistor value is determined, the maximum
loss in the startup resistor is obtained as:
? V MAX ? 2 ? V
? ? AC
? (2)
the operating supply current of the FSCQ series and the
supply voltage (V CC ).
Loss ?
1
R STR
? 2
?
START
2
?
2 2 ? V START ? V AC
?
MAX
?
?
?
C DC
where V ac
max
is the maximum input voltage.
The startup resistor should have properly
dissipation wattage.
rated
1N4007
2. Synchronization : The FSCQ series employs a
AC line
(V acmin - V acmax )
Rstr
I sup
quasi-resonant switching technique to minimize the
switching noise and loss. In this technique, a capacitor
(C r ) is added between the MOSFET drain and the
source, as shown in Figure 27. The basic waveforms of
FSCQ-Series
V CC
C a1
Da
C a2
The external capacitor lowers the rising slope of the
drain voltage to reduce the EMI caused when the
MOSFET turns off. To minimize the MOSFET’s
switching loss, the MOSFET should be turned on when
the drain voltage reaches its minimum value, as shown
Figure 25.
Startup Circuit
C DC
+
V DC
-
Np
Ns
Lm
Vo
I CC
I OP Value
FSCQ0565RT: 4mA (Typ.)
FSCQ0765RT: 4mA (Typ.)
FSCQ0965RT: 6mA (Typ.)
Drain
I OP
FSCQ1265RT: 6mA (Typ.)
FSCQ1565RT: 7mA (Typ.)
Sync
V cc
GND
Cr
Ids
V co
+
V ds
-
D a
Power Down
Power Up
C a1
R cc
C a2
D SY
Na
I START
V CC
V STOP =9V
V START =15V
V Z
R SY1
Figure 26.
Relationship between Operating Supply
Current and V CC Voltage
? 2006 Fairchild Semiconductor Corporation
C SY
Figure 27.
R SY2
Synchronization Circuit
www.fairchildsemi.com
FSQ-Series ? Rev. 1.1.3
13
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| FSCQ0965RTYDTU | IC FPS PWM SWITCH 650V TO-220F-5 |
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| FSD146MRBN | IC FPS POWER SWITCH 650V 8-MDIP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FSCQ0765RT | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPS) |
| FSCQ0765RTYDTU | 功能描述:软开关 PWM 控制器 7A/650V QRC Power Switch RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| FSCQ0965RT | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPS TM) |
| FSCQ0965RTYDTU | 功能描述:软开关 PWM 控制器 POWER_CONVERSION RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| FSCQ1265RT | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPS TM) |
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