参数资料
| 型号： | FSFR2100U |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 10/18页 |
| 文件大小： | 0K |
| 描述： | IC SWIT PROG OVP OCP 9SIP |
| 产品变化通告： | Product Discontinuation 27/Feb/2012 |
| 标准包装： | 19 |
| 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）： | 400W |
| 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 |
| 产品目录页面： | 1222 (CN2011-ZH PDF) |
Functional Description
1. Basic Operation: FSFR-series is designed to drive
high-side and low-side MOSFETs complementarily with
Gain
50% duty cycle. A fixed dead time of 350ns is introduced
between consecutive transitions, as shown in Figure 16.
1.8
f min
f normal
f max
f ISS
1.6
Dead time
High side
MOSFET
gate drive
1.4
1.2
Low side
MOSFET
gate drive
time
1.0
0.8
Soft-start
Figure 16. MOSFETs Gate Drive Signal
0.6
60
70
80
90
100
110
120
130
140
150
freq (kHz)
2. Internal Oscillator : FSFR-series employs a current-
controlled oscillator, as shown in Figure 17. Internally,
Figure 18. Resonant Converter Typical Gain Curve
the voltage of R T pin is regulated at 2V and the
charging/discharging current for the oscillator capacitor,
C T , is obtained by copying the current flowing out of R T
pin (I CTC ) using a current mirror. Therefore, the switching
frequency increases as I CTC increases.
RT
LVcc
VDL
R max
R min
R ss
C ss CON
Control
IC
SG
PG
Figure 19. Frequency Control Circuit
The minimum switching frequency is determined as:
Figure 17. Current Controlled Oscillator
f min =
5.2 k Ω
R min
× 100( kHz )
(1)
3. Frequency Setting : Figure 18 shows the typical
voltage gain curve of a resonant converter, where the
gain is inversely proportional to the switching frequency
in the ZVS region. The output voltage can be regulated
Assuming the saturation voltage of opto-coupler
transistor is 0.2V, the maximum switching frequency is
determined as:
by modulating the switching frequency. Figure 19 shows
the typical circuit configuration for R T pin, where the opto-
coupler transistor is connected to the R T pin to modulate
the switching frequency.
f max = (
5.2 k Ω
R min
+
4.68 k Ω
R max
) × 100( kHz )
(2)
) until the output
from an initial high frequency ( f
To prevent excessive inrush current and overshoot of
output voltage during startup, increase the voltage gain
of the resonant converter progressively. Since the
voltage gain of the resonant converter is inversely
proportional to the switching frequency, the soft-start is
implemented by sweeping down the switching frequency
ISS
voltage is established. The soft-start circuit is made by
connecting R-C series network on the R T pin, as shown
? 2007 Fairchild Semiconductor Corporation
FSFR series Rev.1.0.9
10
www.fairchildsemi.com
相关PDF资料 |
PDF描述 |
|---|---|
| FSFR2100XSL | IC FPS PWR SWITCH 400W 9-SIPL |
| FSGM0465RBWDTU | IC PWM/SENSEFET SMPS TO-220F-6W |
| FSGM0465RLDTU | IC PWM/SENSEFET SMPS TO-220F-6L |
| FSGM0565RBLDTU | IC OFF-LINE SWITCH PWM TO220F-6 |
| FSGM0565RWDTU | IC PWM/SENSEFET SMPS TO-220F-6W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FSFR2100U_10 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Fairchild Power Switch (FPS) for Half-Bridge Resonant Converters |
| FSFR2100US | 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 |
| FSFR2100USL | 功能描述:开关变换器、稳压器与控制器 400W 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 |
| FSFR2100XS | 功能描述:开关变换器、稳压器与控制器 FSFR2100U for 400W 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 |
| FSFR2100XSL | 功能描述:开关变换器、稳压器与控制器 400W Power Sw for Half-Brdg Res Convtr 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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