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产品中心 电源类芯片 反激式转换器/控制器 OB233X
OB233X combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is optimized for high performance, low standby power, and cost effective off-line flyback converter applications.
OB233X offers complete protection coverage with automatic self-recovery feature including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), over temperature protection (OTP), over voltage protection and VDD under voltage lockout (UVLO). Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique together with soft switching control at the totem pole gate drive output.
The tone energy at below 20KHZ is minimized in the design and audio noise is eliminated during operation.
OB233X is offered in SOP8/DIP8 package.
Level 5 compliance with < 100mW standby power at universal AC input
Power on soft start reducing MOSFET Vds stress
Frequency shuffling for EMI
Extended burst mode control for improved efficiency and minimum standby power design
Audio noise free operation
Fixed 55KHZ (typical) switching frequency
Internal synchronized slope compensation
Low VDD startup current and low operating current
Leading edge blanking on current sense input
Comprehensive protection coverage
VDD under voltage lockout with hysteresis (UVLO)
Over temperature protection (OTP) with auto- recovery
On-Bright proprietary line input compensated
Cycle-by-Cycle over-current threshold setting for constant output power limiting over universal input voltage range.
Accurate Overload protection (OLP).
Over voltage protection(OVP)
Secondary Rectifier Short Protection
Offline AC/DC flyback converter for
AC/DC adapter
PDA power supplies
Digital Cameras and Camcorder Adapter
VCR, SVR, STB, DVD&DVCD Player SMPS
Set-Top Box Power
Auxiliary Power Supply for PC and Server
Open-frame SMPS
Product | 230VAC±15% | 85-265VAC |
Open Frame1 | Open Frame1 | |
OB2333 | 8W | 6W |
OB2334 | 16W | 11W |
OB2338 | 27W | 16W |
