Green mode PWM-ICs

FA8A90N

  • Status:Available

FA8A90N 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

  • Low standby power
    1. Incorporates an AC input filter capacitance (XCAP) discharge function. (Reduces loss due to discharge resistance)
    2. Incorporates a frequency reduction function to improve efficiency in the mid-load range. (Can adjust frequency reduction FB voltage using external component constants)
    3. Switches to burst operation at light loads to achieve low standby power consumption.
    4. The operation mode can be switched between normal mode and power-off mode. (Achieves low standby power)
    5. Incorporates a startup circuit with a 650 V withstand voltage (Achieves power savings for the startup circuit).
  • Various protective functions
    1. Incorporates overload protective function. (Spring return)
    2. Incorporates an overload detection value correction function based on the AC input voltage.
    3. Incorporates a latch mode shutoff function using an external signal.
    4. Incorporates an overvoltage protective function (Vthovp = 25.5V typ.)
    5. Incorporates a low voltage protective function (Vvccoff = 6.5V typ.)
    6. Incorporates an overheat protective function (Tohp = 137ºC typ.)
    7. Incorporates a soft start function (Tss = 17ms typ.)
    8. By setting the minimum frequency at 25 kHz, it prevents operation at audible frequencies
  • Achieves low EMI using a frequency spread function.
  • Incorporates a DSS (Dynamic Self Supply) function.
  • Incorporates a drive circuit capable of directly driving power MOSFETs. Output current: 0.5 A (sink) / 0.5 A (source)

Applications

  • Switching Power Supplies

Specifications

Controller type PWM
Applied circuit Flyback
Frequency (kHz) 65
VCC(V) 10 to 24
Built-in start up circuit (V) 650
Over load protection Auto-Recovery
Over voltage protection Latch (VCC)
Package SOP-8

Documentation Tools

Product introduction Low Standby Power PWM Control IC FA8A90 Series
Reference Design Power Supply Control IC Reference Design
Design tools Fly-back transformer design
Selection Guide Power Supply Control IC Selection Guide

Appearance

SOP-8

Block diagram

Circuit diagram

Outline drawing

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