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OB2283 Datasheet

Part Number OB2283
Manufacturers On-Bright Electronics
Logo On-Bright Electronics
Description High Performance Current Mode PWM Controller
Datasheet OB2283 DatasheetOB2283 Datasheet (PDF)

  OB2283   OB2283
OB2283 High Performance Current Mode PWM Controller GENERAL DESCRIPTION OB2283 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications. PWM switching frequency at normal operation is internally fixed and is 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. VCC low startup current and low operating current contribute to a reliable power on startup and low standby design with OB2283. OB2283 offers comprehensive protection coverage with auto-recovery including Cycle-byCycle current limiting (OCP), over load protection (OLP), and VCC under voltage lockout (UVLO). It also provides the protections with latched shut down including over temperature protection (OTP), and over voltage protection (OVP). Excellent EMI performance is achieved with O.






Part Number OB2288
Manufacturers On-Bright Electronics
Logo On-Bright Electronics
Description Highly Integrated Current Mode PWM Controller
Datasheet OB2283 DatasheetOB2288 Datasheet (PDF)

  OB2283   OB2283
OB2288 Highly Integrated Current Mode PWM Controller GENERAL DESCRIPTION OB2288 is a highly integrated current mode PWM controller. With internal maximum 50% duty cycle limit, it is very suitable to be used in large power applications, especially in forward topology. OB2288 offers comprehensive protection coverage including Cycle-by-Cycle current limiting, internal Power-On Soft Start, VDD Under Voltage Lockout (UVLO), VDD Over Voltage Protection(OVP), VDD Clamp, Gate Clamp, Over Load Protection(OLP), Over Temperature Protection (OTP), Brownout Protection (BOP). OB2288 also features protections against pin open and short conditions on selected pins. Moreover, an internal 1-second restart tim.






Part Number OB2287
Manufacturers On-Bright Electronics
Logo On-Bright Electronics
Description High Performance Current Mode PWM Controller
Datasheet OB2283 DatasheetOB2287 Datasheet (PDF)

  OB2283   OB2283
OB2287 High Performance Current Mode PWM Controller GENERAL DESCRIPTION OB2287 is a highly integrated current mode PWM controller for medium to large power offline flyback converter applications. OB2287 enhances On-Bright’s PWM controller series by offering the Brownout Detection and Protection (BOP). OB2287 offers comprehensive protection coverage including Cycle-by-Cycle current limiting, internal Power-On Soft Start, VDD Under Voltage Lockout (UVLO), VDD Over Voltage Protection(OVP), VDD Clamp, Gate Clamp, Over Load Protection(OLP), Over Temperature Protection (OTP), Brownout Protection (BOP). OB2287 also features protections against pin open and short on selected pins. On-Bright’s propri.






High Performance Current Mode PWM Controller

OB2283 High Performance Current Mode PWM Controller GENERAL DESCRIPTION OB2283 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications. PWM switching frequency at normal operation is internally fixed and is 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. VCC low startup current and low operating current contribute to a reliable power on startup and low standby design with OB2283. OB2283 offers comprehensive protection coverage with auto-recovery including Cycle-byCycle current limiting (OCP), over load protection (OLP), and VCC under voltage lockout (UVLO). It also provides the protections with latched shut down including over temperature protection (OTP), and over voltage protection (OVP). Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique. The tone energy at below 25KHz is minimized in the design and audio noise is eliminated during operation. OB2283 is offered in SOT23-6 package. APPLICATIONS Offline AC/DC flyback converter for ■ Printer, Storage power supply ■ Power Adapter FEATURES ■ Power on soft start reducing MOSFET Vds stress ■ Frequency shuffling for EMI ■ Extended burst mode control for improved efficiency and low standby power design ■ Audio noise free operation ■ Peak.



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