OB2278中文资料PWM Control IC with Latch Shutdown数据手册OB规格书

描述 Description

OB2278/OB2279 is a highly integrated high performance PWM controller IC used in AC/DC switch mode power supply applications. Incorporated with On-Bright patented proprietary technology, OB2278/OB2279 helps to achieve low system standby power and high efficiency at reduced BOM cost. OB2278/OB2279 features variable latch shutdown protection options. Frequency shuffling technique is implemented in OB2279 to reduce challenge in system EMI design.

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特性 Features

· Built-in power on soft start to reduce power MOSFET requirement
· VDD over voltage protection(OVP) ¨C latch shutdown
· Over temperature protection(OTP) ¨C auto recovery or latch shutdown
· High integration with low BOM count
· Extended burst mode control for improved efficiency and low standby power design
· Audio Noise Free Operation
· Internal Synchronized Slope Compensation
· Leading Edge Blanking on Current Sense Input
· VDD Under Voltage Lockout with Hysteresis (UVLO)
· Over Load Protection(OLP) ¨C Auto Recovery or Latch Shutdown
· Built-in OCP Compensation to Achieve small OPP Variation over Universal AC Input Range
· Flexible Latch Shutdown Combinations: OVP; OVP+OTP; OVP+OTP+OLP
· Available in DIP8 and SOP8 packages,RoHS compliant

应用 Application

· LCD Monitor, LCD TV
· Notebook Adapter
· Open-Frame SMPS