OB2538 Series

是一种高性能OB2538离线PWM电源开关为低功率AC / DC充电器和适配器的应用程序。它可以达到±5%精密恒压(CV)和高精度恒流(CC)。它是在初级侧感测和监管。因此,光耦合器等和TL431可以被消除。

特点:

±5%恒压调节在通用交流输入

初级侧感测和监管没有TL431和光耦合器等

可编程的简历和CC监管

可调恒流和输出功率设置

内置初级绕组电感补偿

可编程电缆压降补偿

电源软启动

内置前沿消隐(1)

逐周期电流限制

VDD低电压闭锁与滞后(UVLO)

VDD OVP

VDD夹

可在SOP8包,通过无铅认证

应用程序:

CC / CV电池充电器

细胞/无绳电话充电器

数码相机充电器

PDA充电器

小电源适配器

辅助动力为电脑、电视等。

线性调节器/碾压混凝土置换

器件mosfet Rdson(欧姆)包马克斯撅嘴(W)注意马克斯撅嘴(W)(85 ~ 264 v)频率

ob2531外部sot23-6——95khz

ob2532外部sot23-6——60khz

OB2535 / e 12 sop8 10 5 60khz

OB2536 / e 12 dip8 16 9 60khz

OB2538 / e 5 dip8 15 60khz 20

5 dip8 95khz ob2539 18 13

注:最大实际连续功率在一个开放的框架设计有足够的排水模式作为一个散热器,在50°C的环境,230 vac的输入。

OB2538 is a high performance offline PWM Power switch for low power AC/DC charger and adapter applications. It can achieve ±5% precision constant voltage (CV) and high precision constant current (CC). It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated.


Features: 

◆ ±5% constant voltage regulation at universal AC input
◆ Primary-side sensing and regulation without TL431 and opto-coupler
◆ Programmable CV and CC regulation
◆ Adjustable constant current and output power setting
◆ Built-in primary winding inductance compensation
◆ Programmable cable drop compensation
◆ Power on soft-start 
◆ Built-in leading edge blanking (LEB)
◆ Cycle-by-Cycle current limiting
◆ VDD under voltage lockout with hysteresis (UVLO)
◆ VDD OVP
◆ VDD clamp
◆ Available in SOP8 packages, RoHS compliant


Applications: 

◆ CC/CV Battery Charger
◇ Cell/Cordless Phone Charger
◇ Digital Camera Charger
◇ PDA Charger
◆ Small Power Adapter
◆ Auxiliary Power for PC, TV etc.
◆ Linear Regulator/RCC Replacement

Note: Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50°C ambient, 230Vac input. High Precision CC/CV PSR PWM Controller/Power Switch

OB2538 is a high performance offline PWM Power switch for low power AC/DC charger and adapter applications. It can achieve ±5% precision constant voltage (CV) and high precision constant current (CC). It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated.


Features: 

◆ ±5% constant voltage regulation at universal AC input
◆ Primary-side sensing and regulation without TL431 and opto-coupler
◆ Programmable CV and CC regulation
◆ Adjustable constant current and output power setting
◆ Built-in primary winding inductance compensation
◆ Programmable cable drop compensation
◆ Power on soft-start 
◆ Built-in leading edge blanking (LEB)
◆ Cycle-by-Cycle current limiting
◆ VDD under voltage lockout with hysteresis (UVLO)
◆ VDD OVP
◆ VDD clamp
◆ Available in SOP8 packages, RoHS compliant


Applications: 

◆ CC/CV Battery Charger
◇ Cell/Cordless Phone Charger
◇ Digital Camera Charger
◇ PDA Charger
◆ Small Power Adapter
◆ Auxiliary Power for PC, TV etc.
◆ Linear Regulator/RCC Replacement

Note: Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50°C ambient, 230Vac input. 

Typical Application: