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OB2278 - Current Mode PWM Controller

Download the OB2278 datasheet PDF. This datasheet also covers the OB2278-On variant, as both devices belong to the same current mode pwm controller family and are provided as variant models within a single manufacturer datasheet.

Description

OB2278 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

  • 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 selective protections for Latch Shutdown o VDD Over Voltage Protection(OVP).
  • Latch Shutdow.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (OB2278-On-Bright.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number OB2278
Manufacturer On-Bright
File Size 302.94 KB
Description Current Mode PWM Controller
Datasheet download datasheet OB2278 Datasheet

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Other Datasheets by On-Bright

Part Number Description
OB2273 High Performance Current Mode PWM Controller
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Current Mode PWM ControllerLatch Shutdown OB2278 Product Specification GENERAL DESCRIPTION OB2278 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 OB2278. A large value resistor could thus be used in the startup circuit for reduced power loss.
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