ON Semiconductor


Green mode Fairchild Power Switch (FPS™)

Topology: Inverter
Input Voltage (min.): 90.00 V
Input Voltage (max.): 265.00 V
Switching Frequency (min.): 61.00 kHz
Switching Frequency (max.): 73.00 kHz

Original publication on 2012-09-01, revision 1.0.5


The FSL206MR integrates a Pulse Width Modulator (PWM) and SenseFET is specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) while minimizing external components. This device integrates high-voltage power regulators that combine an avalanche-rugged SenseFET with a current mode PWM control block.The integrated PWM controller includes: a 7.8V regulator, eliminating the need for an auxilliary bias winding; Under-Voltage Lockout (UVLO) Protection; Leading-Edge Blanking (LEB); an optimized gate turn-on/turn-off driver; EMI attenuator; Thermal Shutdown (TSD) protection; temperature- compensated precision current sources for loop compensation; soft-start during startup; and fault-protection circuitry such as Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over- Current Protection (AOCP) and Line Under-Voltage Protection (LUVP). The internal high-voltage startup switch and the Burst-Mode operation with very low operating current reduce the power loss in Standby Mode. As a result, it is possible to reach a power loss of 150mW with no bias winding and 25mW (for FSL206MR) or 30mW (for FSL206MRBN) with a bias winding under no-load conditions when the input voltage is 265VAC.


  • Internal Avalanche Rugged SenseFET: 650V
  • Precision Fixed Operating Frequency: 67kHz
  • No-Load <150mw at 265vac without bias winding;
  • <25mw with bias winding for fsl206mr
  • <30mW with Bias Winding for FSL206MRBN
  • No Need for Auxiliary Bias Winding
  • Frequency Modulation for Attenuating EMI
  • Line Under-Voltage Protection (LUVP)
  • Pulse-by-Pulse Current Limiting
  • Low Under-Voltage Lockout(UVLO)
  • Ultra-Low Operating Current: 300µA
  • Built-In Soft-Start and Startup Circuit
  • Various Protections: Overload Protection (OLP),Over-Voltage Protection (OVP), Thermal Shutdown(TSD), Abnormal Over-Current Protection (AOCP),Auto-Restart Mode for All Protections


  Order Code SPEC Product series L
Q IR 1
RDC typ.
RDC max.
IR 1
RDC1 max.
(V (AC))
(V (AC))
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