5MO2659R Datasheet – Power Switch – Fairchild

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The 5MO2659R is an integrated Fairchild Power Switch (FPS), combining a high-voltage SenseFET and a current-mode PWM controller in a single package.

Correct  Part Number: 5M02659R

Function: Fairchild Power Switch(FPS)

Package: DIP 8 Pin Type

Manufacturer: Fairchild Semiconductor

Image:
5MO2659R power switch

Description

5MO2659R is specifically designed for off-line switch-mode power supplies (SMPS), significantly reducing external component count compared to discrete MOSFET and controller implementations or RCC converters. The device integrates multiple protection and control functions, making it highly suitable for compact and cost-effective power designs.

The Fairchild Power Switch(FPS) product family is specially designed for an off-line SMPS with minimal external components. The Fairchild Power Switch(FPS) consist of high voltage power SenseFET and current mode PWM

IC. Included PWM controller features integrated fixed oscillator, under voltage lock out, leading edge blanking, optimized gate turn-on/ turn-off driver, thermal shut down protection, over voltage protection, and temperature compensated precision current sources for loop compensation and fault protection circuitrycompared to discrete MOSFET and controller or RCC switching converter solution.

Pinout

5MO2659R datasheet pinout

Features

  • Integrated high-voltage SenseFET and PWM controller
  • Precision fixed switching frequency options (100kHz / 67kHz / 50kHz)
  • Low start-up current (typ. 100µA) for improved efficiency
  • Current-mode control for fast transient response
  • Pulse-by-pulse current limiting
  • Overload protection (OLP)
  • Over-voltage protection (OVP ≥ 25V)
  • Under-voltage lockout (UVLO)
  • Internal thermal shutdown protection
  • Leading edge blanking (LEB) for noise immunity
  • Auto-restart mode under fault conditions

Absolute Maximum Ratings

Parameter Symbol Value Unit
Drain Voltage VDSS ~650 V
Supply Voltage VCC ~30 V
Operating Temperature TJ -40 ~ +150 °C

Design Notes

  • Primary-side control architecture reduces need for opto-coupler in simple designs
  • Low startup current allows use of high-value startup resistors, minimizing standby loss
  • Auto-restart mode limits power dissipation under fault conditions
  • Leading edge blanking prevents false triggering due to switching spikes
  • Thermal shutdown ensures safe operation under overload or poor thermal conditions
  • Proper transformer design is critical for stable operation in flyback topology

How to Choose This Part

  • Select based on required output power and switching frequency variant
  • Ensure voltage margin for universal AC input (85~265VAC)
  • Evaluate thermal performance with package and heatsinking
  • Confirm protection features meet system reliability requirements
  • Compare with newer integrated PWM + MOSFET solutions for efficiency improvements

Applications

  • AC-DC adapters
  • Consumer electronics power supplies
  • Industrial SMPS
  • Set-top boxes and TV standby circuits
  • Low-power offline converters

Alternative / Equivalent Products

  • FSQ0265RN – Fairchild FPS series
  • FSDM0265R – Integrated PWM + MOSFET solution
  • VIPer22A – STMicroelectronics offline switcher
  • TNY277 – TinySwitch series (Power Integrations)
  • ICE3B0365J – Infineon CoolSET series

5MO2659R Datasheet PDF

5MO2659R pdf


Other data sheets are available within the file: 5H02659RN, 5H0265RC, 5H0280R, 5L0265R, 5M02659R