OB2530PAP

GENERAL DESCRIPTION
OB2530P is a high performance offline PSR power switch 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.
Device operates in PFM in CC mode at large load condition and it operates in PWM with frequency reduction at light/medium load. The chip consumes very low operation current. It achieves less than 75mW standby power to meet strict standby power standard.
OB2530P offers comprehensive protection coverage with auto-recovery feature 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.
OB2530P is offered in DIP8 packages.

FEATURES

• Primary-side sensing and regulation without TL431 and opto-coupler

• High precision CV/CC regulation at universal AC input

• Multi-mode PWM/PFM operation for efficiency

• Integrated 2A 620V MOSFET

• Good dynamic response

• Programmable CV and CC regulation

• Built-in inductance compensation

• Cable drop compensation

• No control loop compensation required

• Audio noise free operation

• Built-in leading edge blanking

• Ultra low startup and operating current

• Comprehensive protections:

  • VDD overvoltage

  • UVLO with hysteresis

  • Cycle-by-cycle current limit

  • Feedback loop open protection

  • Output short protection

  • On-chip OTP

APPLICATIONS

• Cell Phone Charger

• Digital Camera Charger

• Small Power Adapter

• Auxiliary Power for PC, TV etc.

• Linear Regulator/RCC Replacement

Tags: ob2530p, pwm controller, power supply, charger IC, adapter, SMPS, IC