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FSDH0265RL Dataheets PDF



Part Number FSDH0265RL
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description Green Mode Fairchild Power Switch
Datasheet FSDH0265RL DatasheetFSDH0265RL Datasheet (PDF)

www.fairchildsemi.com FSDH0265RN, FSDM0265RN Green Mode Fairchild Power Switch (FPSTM) Features • Internal Avalanche Rugged Sense FET • Consumes only 0.65W at 240VAC & 0.3W load with Advanced Burst-Mode Operation • Frequency Modulation for EMI Reduction • Precision Fixed Operating Frequency • 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).

  FSDH0265RL   FSDH0265RL



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www.fairchildsemi.com FSDH0265RN, FSDM0265RN Green Mode Fairchild Power Switch (FPSTM) Features • Internal Avalanche Rugged Sense FET • Consumes only 0.65W at 240VAC & 0.3W load with Advanced Burst-Mode Operation • Frequency Modulation for EMI Reduction • Precision Fixed Operating Frequency • 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 Lockout (UVLO) • Low Operating Current (3mA) • Adjustable Peak Current Limit • Built-in Soft Start Applications • SMPS for VCR, SVR, STB, DVD & DVCD Player • SMPS for Printer, Facsimile & Scanner • Adapter for Camcorder Related Application Notes • AN-4137, 4141, 4147(Flyback) / AN-4134(Forward) Description Each product in the FSDx0265RN (x for M, H) family consists of an integrated Pulse Width Modulator (PWM) and Sense FET, and is specifically designed for high performance off-line Switch Mode Power Supplies (SMPS) with minimal external components. Both devices are integrated high voltage power switching regulators which combine an avalanche rugged Sense FET with a current mode PWM control block. The integrated PWM controller features include: a fixed oscillator with frequency modulation for reduced EMI, Under Voltage Lock Out (UVLO) protection, Leading Edge Blanking (LEB), an optimized gate turn-on/ turn-off driver, Thermal Shut Down (TSD) protection, Abnormal Over Current Protection (AOCP) and temperature compensated precision current sources for loop compensation and fault protection circuitry. When compared to a discrete MOSFET and controller or RCC switching converter solution, the FSDx0265RN devices reduce total component count, design size, weight while increasing efficiency, productivity and system reliability. Both devices provide a basic platform that is well suited for the design of cost-effective flyback converters. FPSTM is a trademark of Fairchild Semiconductor Corporation. ©2005 Fairchild Semiconductor Corporation OUTPUT POWER TABLE 230VAC ±15%(3) 85-265VAC PRODUCT Adapt- Open Adapt- Open er(1) Frame(2) er(1) Frame(2) FSDL321 11W 17W 8W 12W FSDH321 11W 17W 8W 12W FSDL0165RN 13W 23W 11W 17W FSDM0265RN 16W 27W 13W 20W FSDH0265RN 16W 27W 13W 20W FSDL0365RN 19W 30W 16W 24W FSDM0365RN 19W 30W 16W 24W FSDL321L 11W 17W 8W 12W FSDH321L 11W 17W 8W 12W FSDL0165RL 13W 23W 11W 17W FSDM0265RL 16W 27W 13W 20W FSDH0265RL 16W 27W 13W 20W FSDL0365RL 19W 30W 16W 24W FSDM0365RL 19W 30W 16W 24W Notes: 1. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sinker, at 50°C ambient. 2. Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sinker, at 50°C ambient. 3. 230 VAC or 100/115 VAC with doubler. Typical Circuit AC IN Vstr Drain Ipk PWM Vfb Vcc Source DC OUT Figure 1. Typical Flyback Application Rev.1.0.8 FSDH0265RN, FSDM0265RN Internal Block Diagram Vfb 3 Ipk 4 Vcc 2 VBURH + - VBURL/VBURH Vcc Vcc 8V/12V Vcc IBUR(pk) IDELAY IFB Normal 2.5R Soft Start R Burst Vstr 5 ICH Vcc good Freq. Modulation Vref Internal Bias OSC PWM SQ RQ Gate driver LEB VSD Vcc Vovp TSD Vcc good SQ RQ AOCP Vocp Drain 6,7,8 1 GND Figure 2. Functional Block Diagram of FSDx0265RN 2 Pin Definitions FSDH0265RN, FSDM0265RN Pin Number 1 2 3 4 5 6, 7, 8 Pin Name GND Vcc Vfb Ipk Vstr Drain Pin Function Description Sense FET source terminal on primary side and internal control ground. Positive supply voltage input. Although connected to an auxiliary transformer winding, current is supplied from pin 5 (Vstr) via an internal switch during startup (see Internal Block Diagram section). It is not until Vcc reaches the UVLO upper threshold (12V) that the internal start-up switch opens and device power is supplied via the auxiliary transformer winding. The feedback voltage pin is the non-inverting input to the PWM comparator. It has a 0.9mA current source connected internally while a capacitor and optocoupler are typically connected externally. A feedback voltage of 6V triggers over load protection (OLP). There is a time delay while charging external capacitor Cfb from 3V to 6V using an internal 5uA current source. This time delay prevents false triggering under transient conditions, but still allows the protection mechanism to operate under true overload conditions. This pin adjusts the peak current limit of the Sense FET. The feedback 0.9mA current source is diverted to the parallel combination of an internal 2.8kΩ resistor and any external resistor to GND on this pin to determine the peak current limit. If this pin is tied to Vcc or left floating, the typical peak current limit will be 1.5A. This pin connects directly to the rectified AC line voltage source. At start up the internal switch supplies internal bias and charges an e.


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