Fairchild FSGM300N Data Handbook
Summary
This integrated PWM controller/SenseFET solution provides a robust, cost-effective platform for designing offline Switch-Mode Power Supplies (SMPS). It features advanced protection functions (like OVP, OLP, and AOCP) and low EMI operation, drastically reducing component count compared to discrete designs. The manual provides comprehensive technical resources, including pin definitions, application circuits, operating ratings, and design guidelines, making it ideal for electronics engineers developing reliable power supplies for consumer devices like monitors and standalone systems.
Page 1 Text Content
300N reen -M e F airch ild er S itch (F
April 2012
FSGM300N Green-Mode Fairchild Power Switch (FPS™)
Features Description Advanced Burst-Mode Operation for Low The FSGM300N is an integrated Pulse Width Modulation (PWM) controller and Sense FET specifically
Standby Power
designed for offline Switch-Mode Power Supplies
Random Frequency Fluctuation for Low EMI
(SMPS) with minimal external components. The PWM Pulse-by-Pulse Current Limit controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading-
Various Protection Functions: Overload Protection Edge Blanking (LEB), optimized gate driver, internal (OLP), Over-Voltage Protection (OVP), Abnormal soft-start, temperature-compensated precise current Over-Current Protection (AOCP), Internal Thermal sources for loop compensation, and self-protection Shutdown (TSD) with Hysteresis, Output-Short circuitry. Compared with a discrete MOSFET and PWM Protection (OSP), and Under-Voltage Lockout (UVLO) controller solution, the FSGM series can reduce total with Hysteresis cost, component count, size, and weight; while
simultaneously increasing efficiency, productivity, and
Auto-Restart Mode
system reliability. This device provides a basic platform
Internal Startup Circuit suited for cost-effective design of a flyback converter. Internal High-Voltage Sense FET: 650V Built-in Soft-Start: 15ms
Related Resources
Applications Fairchild Power Supply Web Designer — Flyback
Design & Simulation - In Minutes at No Expense
Power Supply for LCD Monitor, STB and DVD Combination
Ordering Information
Output Power Table(2)
Operating
Current RDS(ON) 230VAC ± 15%(3) 85-265VAC Replaces
Part Number Package Junction
Limit (Max.) Device
Open Open
Temperature
Adapter(4) Adapter(4)
Frame(5) Frame(5)
FSGM300N 8-DIP 1.60A 2.2Ω 26W 40W 20W 30W FSFM300N
Notes: 1. Pb-free package per JEDEC J-STD-020B. 2. The junction temperature can limit the maximum output power. 3. 230VAC or 100/115VAC with voltage doubler. 4. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient temperature. 5. Maximum practical continuous power in an open-frame design at 50°C ambient temperature.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSGM300N • Rev. 1.0.3
Page Summary Contents For Fairchild FSGM300N Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 16 |
| File Size | 1.88 MB |
| Published | June 03, 2026 |
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Frequently Asked Questions
What features are optimized for efficiency and reliability?
The FSGM series reduces cost, component count, size, and weight while increasing system reliability through protections like OVP, AOCP, TSD, and Auto-Restart Mode.
What voltage level triggers the overload protection shutdown (FPS)?
Overload protection is triggered when the voltage at pin 3 (FB) reaches 6V, which shuts down the FPS.
What are two key improvements over discrete MOSFET solutions?
Compared to discrete MOSFET solutions, the FSGM series increases efficiency and productivity while maintaining system reliability.
How can this device be used in a flyback converter design?
It provides a basic platform for cost-effective design of a flyback converter due to its internal startup circuit feature.