Green mode PWM-ICs

FA5680N

  • Status:Available

FA5680 is a current-mode switching power supply control IC that can directly drive power MOSFETs. Despite its compact 8-pin package, it has a wide variety of functions, making it ideal for saving power at light loads and reducing the number of external components, thereby enabling the configuration of space-saving and cost-effective power supplies.

Features

  • Improves efficiency by decreasing the oscillation frequency according to the load at light loads.
  • Sets the minimum frequency at 26 kHz to prevent operation at audible frequencies under light loads in order to improve sound quality.
  • Utilizes an intermittent operation method (burst operation) at light loads to achieve low standby power consumption.
  • Incorporates a startup circuit to achieve low power consumption.
  • Incorporates an overload protective function (spring return) and overvoltage protective function, enabling protective operation with a small number of components.
  • Its current detection negative polarity facilitates input voltage correction at overload operating points.
  • Incorporates a latch mode shutoff circuit using an external signal.
  • Suitable for overheat protection using a thermistor, since it switches to latch mode on pull-down.
  • Incorporates a drive circuit capable of directly driving power MOSFETs. Output current: 1.0 A(sink)/ 0.5 A (source)Incorporates low voltage malfunction prevention circuit.
  • Achieves low EMI using a frequency spread function.
  • Includes a DSS function (Dynamic Self Supply) that enables power supply operation by supplying VCC voltage from the VH pin when no voltage is supplied from the transformer’s auxiliary winding.

Applications

  • Switching Power Supplies

Specifications

Controller type PWM
Applied circuit Flyback
Frequency (kHz) 65
VCC(V) 11 to 24
Built-in start up circuit (V) 750
Over load protection Auto-Recovery
Over voltage protection Latch (VCC)
Package SOP-8

Documentation Tools

Design tools Fly-back transformer design
Selection Guide Power Supply Control IC Selection Guide

Appearance

SOP-8

Block diagram

Circuit diagram

Outline drawing

Contact Us