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:

FET

-

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

  • 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)