Key Features FSL206MR power solutions and application analysis

Fairchild's FSL206MR integrates PWM and SENSEFET, which particularly suitable separation elements are the smallest high-speed offline switching power supply (SMPS). The internal SENSEFET pressure is 650V, the fixed operating frequency is 67kHz, and the 265VAC no voltage winding is less than 150mW, with a variety of protection, mainly used in STB, DVD, and DVCD player switching power supplies, auxiliary power supply. This article describes the main features of FSL206MR, block diagrams, application solve circuit diagrams, and main indicators of FSL206MR 5W evaluation boards, circuit diagrams, materials list, and PCB layout. FSL206MR integrates a pulse width modulator (PWM) and SENSEFET, which is designed for high-performance offline offline switching power supplies (SMPs), with least external components. The device integrates a high voltage power regulator that combines the avalanche SENSEFET with the current mode PWM control module. The integrated PWM controller includes: 7.8V regulator, undervoltage locking (UVLO), an undervoltage lockout (LEB), an optimized gate opening / closing drive, EMI attenuator, thermal off ( TSD)) Protection, temperature compensation for loop compensation, precision current source, such as the following fault protection circuit; overload protection (OLP), overvoltage protection (OVP), abnormal overcurrent protection (AOCP) and line undervoltage Protection (LUVP). During the startup process, FSL206MR provides good soft start performance. The burst mode operation of the internal high pressure start switch and extremely low operating current reduces power loss in standby mode. As a result, when the input voltage is 265VAC, the power loss without the bias winding is 150 mW under non-load conditions, and 25 mW (for FSL206MR) or 30 mW (for FSL206 mRBn) is reached under non-load conditions. The main features of FSL206MR: Internal avalanche rugged SENSEFET: 650V Precision fixed operating frequency: When 265VAC is free, the no-load "150MW (no bias winding); for FSL206MR, less than 25MW (with bias winding); for FSL206MRBN, less than 30MW (with bias winding) No need to assist offset windings Frequency Reduce EMI Line under Wide Wire (LUVP) Modulation of pulse current limit Low undervoltage lock (UVLO) Ultra-low working current: 300A Built-in soft start and startup circuit Various protection: Overload protection (OLP), overvoltage protection (OVP), thermal shutdown (TSD), abnormal overvoltage all protection current protection (AOCP) automatic restart mode FSL206MR application: STB, DVD and DVCD player SMPS auxiliary power supply Figure 1.FSL206MR rack chart Figure 2. Typical application circuit diagram of FSL206MR FSL206MR 5W evaluation board 5W power supply main indicator: Figure 3. FSL206MR 5W Evaluation Board Outline Figure 4. FSL206MR 5W Evaluation Board Circuit Diagram FSL206MR 5W evaluation board material list: Figure 5. FSL206MR 5W evaluation board PCB layout map (schematic) Figure 6. FSL206MR 5W evaluation board PCB layout map (never) Editor in charge: GT, read full text