PWM控制芯片系列产品

L:Latch; A:Auto-recovery 

OB2268/OB2269

High Performance Current Mode PWM Controller

OB2268/OB2269 is a highly integrated PWM control IC designed for AC/DC switch mode power applications.

Implemented with On-Bright patented proprietary technology,it achieves low standby power and high 

efficiency at reduced BOM cost.It also features comprehensive protection coverage and performance 

enhancement(EMI,etc).

Features: 

◆ Built-in leading edge blanking(LEB) at current sense input
◆ VDD over voltage protection (OVP)
◆ Over temperature protection (OTP)
◆ VDD under voltage lockout with hysteresis (UVLO)
◆ Over load protection (OLP)
◆ Built-in line compensated OCP achieving balanced OCP over universal input
◆ Frequency shuffling improving EMI performance (OB2269 only)
◆ Available in DIP8 and SOP8 packages,RoHS compliant

Applications: 

◆ LCD Monitor/TV Power
◆ DVD Power
◆ Notebook Adapter
◆ PC/TV/Set-Box Power

Typical Application:

OB2278/OB2279

PWM Control IC with Latch Shutdown

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.

Features: 

◆ Built-in power on soft start to reduce power MOSFET requirement
◆ VDD over voltage protection(OVP) – latch shutdown
◆ Over temperature protection(OTP) – 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) – 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



Applications: 

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

Typical Application:

OB2287/OB2288

High Power PWM Control IC

OB2287/OB2288 is a high performance PWM control IC designed for high power AC/DC switch-mode 

power supply applications. OB2287 is designed for flyback applications while OB2288 is for 

forward mode with maximum duty cycle of 50%. OB2287/OB2288 is optimized by incorporating 

erformance and protection features to support customer requirements with reduced application

complexity, reduced BOM cost and reduced design cycle time.

Features: 

◆ 1500mA gate drive capability with optimized drive control 

◆ Built in brown out/recovery control to improve system reliability without adding extra cost

◆ Power on soft start
◆ Built-in leading edge blanking(LEB) at sense input
◆ Frequency shuffling for system EMI improvement
◆ Wide VDD input range with VDD OVP latch and clamp protections.
◆ Noise immunity design
◆ Internal selectable latch shutdown to improve system reliability 
◆ Available in DIP8 and SOP8 packages,RoHS compliant

Applications: 

◆ LCD TV, LCD Monitor 
◆ Printer Power
◆ Power Adapter 
◆ PC Power
◆ Notebook Adapter

Typical Application:

OB2298     

Current Mode PWM Controller with Built-in PFC Power Control OB2298 is designed with On-Bright GreenEngineTM Technology to deliver overall low standby power and excellent efficiency 

in meeting various international requirements. It integrates PFC IC power control functions by 

supply PFC IC power and shut it down at no load or light load conditions. OB2298 is compatible

 with main stream PFC IC 

in the market. 

Features: 

◆ PFC IC power control function integrated
◆ Shutdown PFC IC at no/light load condition for lower standby power and better efficiency control
◆ Built in brown out/recovery control to improved system reliability without adding extra cost
◆ 1500mA gate drive capacity
◆ Built-in 4ms soft start 
◆ Built-in 1s timer for auto-recovery after error shutdown
◆ Frequency shuffling technology for EMI improvement
◆ Pin open/short protection
◆ Current mode control with internal slope compensation and leading edge blank at CS input
◆ Internal selectable latch shutdown for improved system reliability
◆ Available in DIP8 and SOP8 packages,RoHS compliant

Applications: 

◆ Notebook Adapter
◆ LCD Monitor Power
◆ LCD TV Power and Home Appliance Power
◆ Printer Power

Typical Application:

手  机：13929253003 王小姐

Q   Q：2365818764

电  话：0769-89917065

传  真：0769-82616686

办公地址：东莞市塘厦大道北552号3H创客中心312

电子邮箱：goodonecn@163.com