AC/DC转换器

控制模式：PWM

输入电压Vin：85V~265VAC

输出电压Vout：可调

输出精度Acuu：±5%

静态电流Iq：2.8mA

振荡频率Fosc：65KHz

输出功率可达60W

封装形式：SOT23-6

替换参考：ME8200兼容OB2263,OB2269(90W)

典型应用：小冰箱

ME8200 Current Mode PWM Controller With Frequency Shuffling

General Description：

ME8200 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications in sub 30W range. PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved.VDD low startup current and low operating current contribute to a reliable power on startup design with ME8200. A large value resistor could thus be used in the startup circuit to minimize the standby power.The internal slope compensation improves system large signal stability and reduces the possible subharmonic oscillation at high PWM duty cycle output. Leading-edge blanking on current sense(CS) input removes the signal glitch due to snubber circuit diode reverse recovery and thus greatly reduces the external component count and system cost in the design. ME8200 offers complete protection coverage with automatic self-recovery feature including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD over voltage clamp and under voltage lockout (UVLO). The Gate-drive output is clamped to maximum 18V to protect the power MOSFET. Excellent EMI performance is achieved with frequency shufflingue together with soft switching control at the totem pole gate drive output. Tone energy at below 20KHZ is minimized in the design and audio noise is eliminated during operation. ME8200 is offered in SOT23-6 package.

Features：

-Frequency Shuffling Technology for Improved EMI Performance.

-Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design

-Audio Noise Free Operation

-External Programmable PWM Switching Frequency

-Internal Synchronized Slope Compensation

-Low VDD Startup Current and Low Operating Current (1.4mA)

-Leading Edge Blanking on Current Sense Input

-Good Protection Coverage With Auto Self-Recovery

-VDD Over Voltage Clamp and Under Voltage Lockout with Hysteresis (UVLO)

-Gate Output Maximum Voltage Clamp (20V)

-Line Input Compensated Cycle-by-Cycle Over-current Threshold Setting For Constant Output Power Limiting Over Universal Input Voltage

Range.

-Overload Protection (OLP)

Typical Application

Offline AC/DC flyback converter for

-Battery Charger

-Power Adaptor

-Set-Top Box Power Supplies

-Open-frame SMPS