Maker : Fairchild Semiconductor
Part No. : DM0565R

Datasheet PDF : DM0565R.pdf
Cross Reference : DM0565R Cross Reference
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Product Information

www.fairchildsemi.com FSDM0565R Features Green Mode Fairchild Power Switch (FPSTM) • Internal Avalanche Rugged Sense FET • Advanced Burst-Mode operation consumes under 1 W at 240VAC & 0.5W load www.DataSheet4U.com • Precision Fixed Operating Frequency (66kHz) • Internal Start-up Circuit • Pulse by Pulse Current Limiting • Abnormal Over Current Protection (AOCP) • Over Voltage Protection (OVP) • Over Load Protection (OLP) • Internal Thermal Shutdown Function (TSD) • Auto-Restart Mode • Under Voltage Lock Out (UVLO) with hysteresis • Low Operating Current (2.5mA) • Built-in Soft Start OUTPUT POWER TABLE 230VAC ±15%(3) PRODUCT FSDM0565R FSDM07652R Adapter(1) 60W 70W Open Frame(2) 70W 80W 85-265VAC Adapter(1) 50W 60W Open Frame(2) 60W 70W Table 1. Notes: 1. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient. 2. Maximum practical continuous power in an open frame design at 50°C ambient. 3. 230 VAC or 100/115 VAC with doubler. Application • SMPS for LCD monitor and STB • Adaptor Typical Circuit Description The FSDM0565R is an integrated Pulse Width Modulator (PWM) and Sense FET specifically designed for high performance offline Switch Mode Power Supplies (SMPS) with minimal external components. This device is an integrated high voltage power switching regulator which combine an avalanche rugged Sense FET with a current mode PWM control block. The PWM controller includes integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft start, temperature compensated precise current sources for a loop compensation and self protection circuitry. Compared with discrete MOSFET and PWM controller solution, it can reduce total cost, component count, size and weight simultaneously increasing efficiency, productivity, and system reliability. This device is a basic platform well suited for cost effective designs of flyback converters. AC IN DC OUT Vstr PWM Vfb Drain Vcc Source Figure 1. Typical Flyback Application Rev.1.0.5 ©2005 Fairchild Semiconductor Corporation FSDM0565R Internal Block Diagram Vcc 3 N.C 5 0.5/0.7V + Vstr 6 Drain 1 Istart Vref 8V/12V Switching disable OSC Idelay IFB S Q Vcc Vref Vcc good Internal Bias www.DataSheet4U.com Vfb 4 PWM 2.5R Soft start R Q Gate driver R LEB V SD Vcc S Q 2 GND Vovp TSD Vcc good R Q AOCP Vocp Figure 2. Functional Block Diagram of FSDM0565R 2 FSDM0565R Pin Definitions Pin Number 1 2 3 www.DataSheet4U.com Pin Name Drain GND Vcc Pin Function Description This pin is the high voltage power Sense FET drain. It is designed to drive the transformer directly. This pin is the control ground and the Sense FET source. This pin is the positive supply voltage input. During start up, the power is supplied by an internal high voltage current source that is connected to the Vstr pin. When Vcc reaches 12V, the internal high voltage current source is disabled and the power is supplied from the auxiliary transformer winding. This pin is internally connected to the inverting input of the PWM comparator. The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 6.0V, the over load protection is activated resulting in shutdown of the FPSTM. This pin is connected directly to the high voltage DC link. At startup, the internal high voltage current source supplies internal bias and charges the external capacitor that is connected to the Vcc pin. Once Vcc reaches 12V, the internal current source is disabled. 4 Vfb 5 6 N.C Vstr Pin Configuration TO-220F-6L 6.Vstr 5.N.C. 4.Vfb 3.Vcc 2.GND 1.Drain Figure 3. Pin Configuration (Top View) 3 FSDM0565R Absolute Maximum Ratings (Ta=25°C, unless otherwise specified) Parameter Drain-source voltage Vstr Max Voltage Pulsed Drain current (Tc=25°C) (1) Symbol VDSS VSTR IDM ID EAS IAS VCC VFB PD...

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