页页次: 1/9
RS2259
第二面调节电流模式PWM电源切换器
概述
RS2259 combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is optimized for high performance,
low standby power, and cost effective off‐line flyback converter applications in sub 27W range.
RS2259 offers complete protection coverage with automatic self‐recovery feature including Cycle‐by‐Cycle current limiting (OCP), over
过载保护( OLP ) , VDD过压钳位和欠压锁定( UVLO ) 。优异的EMI性能达到与Orister
专有的频率摇动的图腾柱栅极驱动输出软开关控制在一起的技术。基调能量
below 20KHz is minimized in the design and audio noise is eliminated during operation. RS2259 is offered in DIP‐8 package.
特点是什么?
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开机软启动降低MOSFET V
DS
应力
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频率摇动以降低EMI
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突发模式控制,以提高效率和最低
备用电源的设计
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音频无噪音运行
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Fixed 50KHz Switching Frequency
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内置同步斜率补偿
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低V
DD
启动电流和低工作电流
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在电流检测输入前沿消隐
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良好的保护范围内的自动自我修复
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V
DD
过电压钳位和欠压锁定
保护(UVLO )
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线路输入补偿的逐周期过流保护
阈值设置为恒定输出功率限制
在通用输入电压范围
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过载保护( OLP )
◎
过电压保护( OVP )
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DIP‐8 Package
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RoHS Compliant and 100% Lead (Pb)‐Free and Green (Halogen
免费与商业标准)
应用程序“
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电池充电器
数码相机和摄像机适配器
掌上电脑电源
VCR , SVR , STB , DVD & DVCD播放器SMPS
机顶盒(STB )电源
辅助电源为PC和服务器
开架式开关电源
应用电路
1
L1
D1
4
-
+
2
C1
C2
R2
R5
R1
C5
T1
C4
VOUT
D4
AC IN
1
Np
D2
R3
C3
NAUX
D3
2
3
Ns
C6
R6
GND
U1
VDDG
VDD
FB
GND
GND
漏
U2
4
3
1
2
R7
R9
C8
R8
SENSE排水
R4
RS2259
C7
D5
RS431
R10
DS‐RS2259‐
May, 2010
www.Orister.com