OB2571 Datasheet PDF | On-Bright Electronics

On-Bright Electronics OB2571

OB2571x is an excellent primary side regulation controller with CC/CV operation for medium level power AC/DC charger and adapter applications. The device integrates an internal power MOSFET and operates in QR mode to provide high efficiency along with several functions of built-in protections. It removes the need for secondary feedback circuitry to lower the total bill of material cost.

Part No.	OB2571
Datasheet	OB2571 Download
Manufacturer	On-Bright Electronics
Description	High Performance QR mode Primary-Side Power Switch
Buy	Stock & Price

GENERAL DESCRIPTION

Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CV control, the controller changes the mode of operation according to load condition. At full loading, the controller operates in quasi-resonant (QR) mode in the universal line voltage. The primary side regulation power supplies up to high power without the efficiency limitation of DCM or audible noise. In CC control, OB2571x samples the Vcs peak current and the demagnetization pulse to regulation the output current. The current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. OB2571x offers comprehensive protection coverage with auto-recovery feature including Cycle-by-Cycle current limiting, VDD OVP, OLP, SCP, OTP etc. OB2571x consumes less than 75mW input power at no- load condition with high line voltage. OB2571x is offered in SOP8 package.

FEATURES

● Primary-side sensing and regulation operates in QR mode with...