Datasheet

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Product structure：Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays

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TSZ02201-0F1F0A200050-1-2

17.Apr.2015. Rev.001

© 2015 ROHM Co., Ltd. All rights reserved.

TSZ22111・14・001

www.rohm.com

Low Noise Quasi-Resonant Control

DC/DC converter IC for AC/DC Converter

BD7682FJ-LB BD7683FJ-LB BD7684FJ-LB BD7685FJ-LB

General Description

This is the product guarantees long time support in the

Industrial market.

BD768xFJ series is a Quasi-resonant controller type

DC/DC converters that provide an optimum system for

all

products

that

include

an

electrical

outlet.

Quasi-resonant operation enables soft switching and

helps to keep EMI low. Design with a high degree of

flexibility is achieved with switching MOSFETs and

current detection resistors as external devices.

The built-in brown out function monitors the input

voltage as part of system optimization. The burst mode

function reduces input power at low power.

BD768xFJ series include various protection functions,

such as a soft start function, burst function, per-cycle

over-current limiter function, overvoltage protection

function, overload protection function, and brown out

function.

BD768xFJ series include a gate-clamp circuit for

optimal driving SIC-MOSFET.

Features



Pin 8 : SOP-J8 Package

(6.00mm × 4.90mm : 1.27mm pitch <TYP>)



Quasi-resonant type (low EMI)



Frequency reduction mode



Low current consumption (19µA), during standby



Low current consumption when no load (burst

operation when light load)



Maximum frequency (120kHz)



CS Pin Leading-Edge Blanking



VCC UVLO (Under Voltage Drop Out protection)



VCC OVP (Over Voltage Protection)



Per-cycle over-current protection circuit



Soft start



ZT trigger mask function



Voltage protection function (brown out)



ZT OVP (Over Voltage Protection)



Gate-clamp circuit

Typical Application Circuit

Key Specifications



Operating Power Supply Voltage Range:

VCC 15.0V to 27.5V



Normal Operating Current:

0.80mA(Typ)



Burst Operating Current:

0.50mA(Typ)



Maximum Frequency:

120kHz(Typ)



Operating Temperature:

-40°C to +105°C

Package

4.90mm x 6.00mm x 1.65mm pitch 1.27mm

(Typ.)

(Typ.)

(TYP.)

(TYP.)

Lineup

FBOLP

VCCOVP

BD7682FJ

AutoRestart

Latch

BD7683FJ

Latch

Latch

BD7684FJ

AutoRestart

AutoRestart

BD7685FJ

Latch

AutoRestart

Applications

Industrial equipment, AC Adaptor, Household appliances

SOP-J8

4.90mm x 6.00mm x 1.65mm