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OB2550 - High Precision CC/CV Primary-Side Controller

Download the OB2550 datasheet PDF. This datasheet also covers the OB2550-On variant, as both devices belong to the same high precision cc/cv primary-side controller family and are provided as variant models within a single manufacturer datasheet.

General Description

OB2550 is a high performance offline PSR controller for low power AC/DC charger and adapter applications.

It operates in primary-side sensing and regulation.

Consequently, opto-coupler and TL431 could be eliminated.

Key Features

  • including Cycle-by-Cycle current limiting, VDD over voltage protection, feedback loop open protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO), OTP etc. OB2550 is offered in SOT23-6 package. Figure.1. Typical CC/CV Curve.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (OB2550-On-BrightElectronics.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number OB2550
Manufacturer On-Bright
File Size 354.10 KB
Description High Precision CC/CV Primary-Side Controller
Datasheet download datasheet OB2550 Datasheet

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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
OB2550 High Precision CC/CV Primary-Side Controller GENERAL DESCRIPTION OB2550 is a high performance offline PSR controller for low power AC/DC charger and adapter applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable drop compensation.