BD7684FJ-LB
Low Noise Quasi-Resonant Control DC/DC converter IC for AC/DC Converter

This is the product guarantees long time support in the Industrial market. BD7684FJ-LB 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. BD7684FJ-LB includes 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. BD7684FJ-LB includes a gate-clamp circuit for optimal driving SIC-MOSFET.

Product Detail

 
Part Number | BD7684FJ-LBE2
Status | Recommended
Package | SOP-J8
Unit Quantity | 2500
Minimum Package Quantity | 2500
Packing Type | Taping
RoHS | Yes

Specifications:

Frequency Reduction Function

Yes

Current Detection Resistors

External

Dynamic Over Current Detection

No

FB OLP

Auto Restart

ZT OVP

Latch

BR UVLO

Yes

External LATCH Function

No

AC Monitor Function

No

VH Terminal UVLO

No

FET

External

Controller Type

QR

Vin1(Min.)[V]

15.0

Vin1(Max.)[V]

27.5

SW Frequency (Max.)[kHz]

120.0

VCC OVP

Auto Restart

BR PIN

Yes

Channel

1

Light Load mode

Yes

EN

No

Soft Start

Yes

Thermal Shut-down

Yes

Under Voltage Lock Out

Yes

Operating Temperature (Min.)[°C]

-40

Operating Temperature (Max.)[°C]

105

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

Design Resources

 

Documents

Application Note

  • Design Considerations on the Gate Driving Circuit of Quasi-Resonant Controller for 1700V SiC MOSFET

Technical Articles

Schematic Design & Verification

  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Thermal Resistance

Tools

2D/3D/CAD

  • BD7684FJ-LB Footprint / Symbol
  • SOP-J8 Footprint / Symbol
  • SOP-J8 3D STEP Data

Packaging & Quality

Package Information

  • Package Information
  • Anti-Whisker formation

Manufacturing Data

  • Factory Information

Environmental Data

  • UL94 Flame Classifications of Mold Compound
  • Compliance with the ELV directive
  • REACH SVHC Non-use Declaration
  • RoHS Comission Delegated Directive

Export Information

  • The Export Control Order
  • Export Administration Regulations(EAR)