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OB2279 - Current Mode PWM Controller

This page provides the datasheet information for the OB2279, a member of the OB2279-On Current Mode PWM Controller family.

Datasheet Summary

Description

OB2279 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 externally programmable and trimmed to tight range.

Features

  • On-Bright Proprietary Frequency Shuffling Technology for Improved EMI Performance.
  • Power On Soft Start.
  • Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design.
  • Audio Noise Free Operation.
  • External Programmable PWM Switching Frequency.
  • Internal Synchronized Slope Compensation.
  • Low VIN/VDD Startup Current(3uA) and Low Operating Current (2.3mA).
  • Leading Edge Blanking on Current Sense Input.
  • Complete Protection Coverage with.

📥 Download Datasheet

Datasheet preview – OB2279

Datasheet Details

Part number OB2279
Manufacturer On-Bright
File Size 364.52 KB
Description Current Mode PWM Controller
Datasheet download datasheet OB2279 Datasheet
Additional preview pages of the OB2279 datasheet.

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Full PDF Text Transcription

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RESLEEPRAILSCEAELAODSNNEFTIO:oDD2EOA7NP9NT0IDO0AT6L8COPY OB2279 Current Mode PWM ControllerFreq Shuffling with Latch Shutdown GENERAL DESCRIPTION OB2279 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 externally programmable and 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. VDD low startup current and low operating current contribute to a reliable power on startup design with OB2279. A large value resistor could thus be used in the startup circuit for reduced power loss.
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