OB5222AP中文资料PWM Converter with Integrated MOSFET数据手册OB规格书

描述 Description

OB5222 is a highly integrated current mode PWM power switch. It is designed with High voltage startup, optimized for high performance, extra low standby power consumption (<30mW) and cost effective offline flyback converter applications.

PWM switching frequency at normal operation is internally fixed and is trimmed to a tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Less than 30mW standby power consumption and very high conversion efficiency is thus achieved.

High voltage startup is implemented in OB5222, which features with short startup time and extra low standby current.

OB5222 offers complete protection coverage with auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD under voltage lockout (UVLO), and over temperature protection (OTP). It also provides the protection with latched shut down including VDD over voltage protection. Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique. The tone energy at below 22KHZ is minimized to avoid audio noise during operation.

OB5222 is offered in DIP8 package.

特性 Features

Built-in High Voltage Startup

Extra Low Standby (<30mW)

Integrated with HV MOSFET

Power on Soft Start

Frequency shuffling for EMI

Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power

Audio Noise Free Operation

Fixed 65KHZ Switching Frequency

Comprehensive Protection Coverage

VDD Under Voltage Lockout with Hysteresis (UVLO)

Cycle-by-cycle Over Current Protection (OCP)

Overload Protection (OLP) with Auto-recovery

Over Temperature Protection (OTP) with Auto-recovery

VDD Over Voltage Protection(OVP) with Latch Shut Down

应用 Application

Offline AC/DC flyback converter for

AC/DC Adapter

PDA Power Supplies

Digital Cameras and Camcorder Adapter

VCR, SVR, STB, DVD&DVCD Player SMPS

Set-Top Box Power

Auxiliary Power Supply for PC and Server

Open-frame SMPS