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OB2203 Datasheet Quasi-resonant Flyback Pwm Controller

Manufacturer: On-Bright

Overview: OB2203 Quasi-Resonant Flyback PWM Controller GENERAL.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

OB2203 is a highly integrated Quasi-Resonant (QR) controller optimized for high performance offline flyback converter applications.

At normal load condition, it operates in QR mode with minimum drain voltage switching.

To meet the CISPR-22 EMI starting at 150KHz, the maximum switching frequency is internally limited to 130KHz.

Key Features

  • Multi-Mode Operation.
  • Quasi-Resonant Operation at Normal Loading.
  • Pulse Frequency Modulation (PFM) Operation at Light Load.
  • Burst Mode at No Load.
  • Direct Control of the Power Supply of PFC Controller for Improved Standby Power at No/Light Load.
  • 40KHz Minimum Frequency Limit at QR Mode.
  • 130KHz Maximum Frequency Limit.
  • Internal Minimum T_off for Ringing Suppression.
  • 45us Maximum On Time Limit.
  • Adaptive Slope Compensation.
  • Internal Leading Edg.

OB2203 Distributor & Price

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