General Description

BD7F205EFJ-C is an opto-coupler-less isolated flyback

converter. Feedback circuit by optocouplers or the

auxiliary winding of transformers becomes unnecessary,

contributing to reduction of set parts. Furthermore, the

adoption of original adapted ON-time control technology

enables fast load response. In addition, the various

protection function realizes the designs of isolated power

supply application for high reliability.

Features

◼ AEC-Q100 Qualified (Note 1)

◼ No Need for Optocoupler and Third Winding of

Transformer

◼ Set Output Voltage with Two External Resistors and

Ratio of Transformer Turns

◼ Adopt of Original Adapted ON-Time Control Technology

Fast Load Response

◼ High Efficiency at Light Load Mode (PFM Operation)

◼ Shutdown Function / Enable Control

◼ Built-in 60 V Switching MOSFET

◼ Frequency Spectrum Spread

◼ Soft Start Function

◼ Load Compensation Function

◼ Various Protection Function

Input Low Voltage Lockout (UVLO)

Over Current Protection (OCP)

Thermal Shutdown (TSD)

REF Pin Open Protection (REFOPEN)

Short Circuit Protection (SCP)

Battery Short Protection (BSP)

◼ HTSOP-J8 Package

Applications

◼ Automotive Isolated Power Supplies

(E-Comp, Inverter etc)

◼ Industrial Isolated Power Supplies