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Rohm Semiconductor Electronic Components Datasheet

BD7684FJ-LB Datasheet

Low Noise Quasi-Resonant Control DC/DC converter IC

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BD7684FJ-LB pdf
Datasheet
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
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.)
SOP-J8
4.90mm x 6.00mm x 1.65mm
Lineup
BD7682FJ
BD7683FJ
BD7684FJ
BD7685FJ
FBOLP
AutoRestart
Latch
AutoRestart
Latch
VCCOVP
Latch
Latch
AutoRestart
AutoRestart
Applications
Industrial equipment, AC Adaptor, Household appliances
Typical Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has no designed protection against radioactive rays
1/27
TSZ02201-0F1F0A200050-1-2
17.Apr.2015. Rev.001


Rohm Semiconductor Electronic Components Datasheet

BD7684FJ-LB Datasheet

Low Noise Quasi-Resonant Control DC/DC converter IC

No Preview Available !

BD7684FJ-LB pdf
BD768xFJ-LB Series
Pin Descriptions
No. Pin Name
1 ZT
2 FB
3 CS
4 GND
5 OUT
6 MASK
7 VCC
8 BO
I/O Function
I Zero Current Detect pin
I Feedback signal input pin
I Current Sense pin
I/O GND pin
O MOSFET drive pin
O External TR drive
I Power Supply pin
O Brown IN/OUT monitor pin
Block Diagram
ESD Diode
VCC GND
-
✓✓
✓✓
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✓✓
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Datasheet
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/27
TSZ02201-0F1F0A200050-1-2
17.Apr.2015. Rev.001


Part Number BD7684FJ-LB
Description Low Noise Quasi-Resonant Control DC/DC converter IC
Maker Rohm
Total Page 30 Pages
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