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OB2631x 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.
OB2631x offers comprehensive protection coverage with auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD under voltage lockout (UVLO) and internal over temperature protection (OTP). Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique.
The tone energy at below 23KHz is minimized in the design and audio noise is eliminated during operation.
OB2631x is offered in SOP8 package.
■ Very wide range of VDD supply voltage
■ Standby power < 75mW 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
■ Fixed 65KHZ (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
o VDD Under Voltage Lockout with hysteresis (UVLO)
o VDD Over Voltage Protection (VDD OVP)
o Cycle-by-cycle over current threshold setting for constant output power limiting over universal input voltage range
o Over Load Protection (OLP) with auto-recovery
o Output diode short protection with auto-recovery
Offline AC/DC flyback converter for
■ PD adapter
■ Wide output range adapter
