OB2710 Current Mode PWM Control IC

OB2710 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications At normal load condition, it operates in fixed frequency mode. When the loading goes low, it operates in PFM mode for high power conversion efficiency. When the load is very small, the IC operates in ‘Extended Burst Mode’ to minimize the standby power loss. As a result, high conversion efficiency can be achieved in the whole loading range. VCC low startup current and low operating current contribute to a reliable power on startup and low standby design with OB2710 offers Vth_oc compensation. OB2710 offers comprehensive protection coverage with auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), AC brownout protection,VCC under voltage lockout (UVLO), external over temperature protection (OTP), over voltage protection (OVP) and short protection(SCP).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 ng operation. OB2710 is offered in SOT23-6 package

Key Features

• ■
• Power on soft start reducing MOSFET Vds stress
• Multi-Mode Operation
• 77KHz maximum clamping frequency in QR mode @
• Full Load in high line voltage
• 65KHz minimum clamping frequency in CCM mode @ Heavy Load in high line voltage
• 100KHz maximum clamping frequency in QR mode @ Full Load in low line voltage
• 85KHz minimum clamping frequency in CCM mode @ Heavy Load in low line voltage
• Valley switching operation @ Green mode
• Burst Mode @ Light Load & No Load
• Frequency shuffling for EMI
• Extended burst mode control for improved efficiency and low standby power design
• Audio noise free operation
• Adjust Vth_oc compensation through

Applications

• Offline AC/DC flyback converter for
• ■
• General power supply
• Power Adapter

Part Numbers and Specifications

Product family: On-Bright official page