FSQ0270RNA

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It is specifically designed for high-performance off-line Switch Mode Power Supplies (SMPS) with minimal external components. The integrated PWM controller features include: a fixed-frequency generating oscillator, Under-Voltage Lockout (UVLO) protection, Leading Edge Blanking (LEB), an optimized gate turn-on/ turn-off driver, Thermal Shutdown (TSD) protection, and temperature compensated precision current sources for loop compensation and fault protection circuitry.  Consumes only 0.8W at 230 VAC & 0.5W Load with Burst-Mode Operation  Precision Fixed Operating Frequency, 100kHz  Internal Start-up Circuit and Built-in Soft-Start  Pulse-by-Pulse Current Limiting and Auto-Restart Mode  Over-Voltage Protection (OVP), Overload Protection (OLP), Internal Thermal Shutdown Function (TSD)  Under-Voltage Lockout (UVLO)  Low Operating Current (3mA)  Adjustable Peak Current Limit Applications  Auxiliary Power Supply for PC and Server  SMPS for VCR, SVR, STB, DVD & DVCD Player, Printer, Facsimile & Scanner  Adapter for Camcorder Compared to a discrete MOSFET and controller or RCC switching converter solution, the FSQ0170RNA, and FSQ0270RNA reduces total component count, design size, and weight while increasing efficiency, productivity, and system reliability. These devices provide a basic platform that is well suited for the design of cost-effective flyback converters, as in PC auxiliary power supplies. Related Application Notes 8-DIP  AN-4134: Design Guidelines for Off-line Forward Converters Using Fairchild Power Switch (FPS™)  AN-4137: Design Guidelines for Off-line Flyback Converters Using Fairchild Power Switch (FPS™)  AN-4141: Troubleshooting and Design Tips for Fairchild Power Switch (FPS™) Flyback Applications  AN-4147: Design Guidelines for RCD Snubber of Flyback  AN-4148: Audible Noise Reduction Techniques for FPS™ Applications Ordering Information Product Number Package Marking Code BVDSS fOSC RDS(ON) (MAX.) FSQ0170RNA 8DIP Q0170RA 700V 100kHz 11 FSQ0270RNA 8DIP Q0270RA 700V 100kHz 7.2 FPSTM is a trademark of Fairchild Semiconductor Corporation. © 2006 Fairchild Semiconductor Corporation FSQ0170RNA, FSQ0270RNA Rev. 1.0.5 www.fairchildsemi.com FSQ0170RNA, FSQ0270RNA — Green Mode Fairchild Power Switch (FPS™) October 2011 AC IN DC OUT Vstr IPK Drain PWM VCC FB GND FSQ0x70RNA Rev. 1.01 Figure 1. Typical Flyback Application Output Power Table(1) 230VAC 15%(2) Product Adapter (3) 85–265VAC Open Frame (4) Adapter (3) Open Frame(4) FSQ0170RNA 14W 20W 9W 13W FSQ0270RNA 17W 24W 11W 16W Notes: 1. The maximum output power can be limited by junction temperature. 2. 230 VAC or 100/115 VAC with doubler. 3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sink, at 50C ambient. 4. Maximum practical continuous power in an open-frame design with sufficient drain pattern as a heat sink, at 50C ambient. Internal Block Diagram VCC Vstr 2 5 Drain 6,7,8 ICH 8V/12V VCC good VCC Internal Bias Vref VBURL/VBURH VCC OSC IDELAY IFB Normal FB 3 2.5R PWM R IPK 4 S Q R Q Gate Driver Burst LEB VSD VCC 1 S Q R Q GND Vovp VCC good TSD Soft-Start FSQ0x70RNA Rev. 1.00 Figure 2. Internal Block Diagram © 2006 Fairchild Semiconductor Corporation FSQ0170RNA, FSQ0270RNA Rev. 1.0.5 www.fairchildsemi.com 2 FSQ0170RNA, FSQ0270RNA — Green Mode Fairchild Power Switch (FPS™) Application Diagram GND VCC D D 8-DIP FB D IPK Vstr FSQ0x70RNA Rev. 1.00 Figure 3. Pin Configuration (Top View) Pin Definitions Pin # Name Description 1 GND Ground. SenseFET source terminal on primary side and internal control ground. VCC Power Supply. Positive supply voltage input. Although connected to an auxiliary transformer winding, current is supplied from pin 5 (Vstr) via an internal switch during start-up, see Figure 2. 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. FB Feedback. 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 opto-coupler are typically connected externally. A feedback voltage of 6V triggers overload protection (OLP). There is a time delay while charging external capacitor CFB from 3V to 6V using an internal 5µA current source. This time delay prevents false triggering under transient conditions, but still allows the protection mechanism to operate under true overload conditions. IPK Peak Current Limit. This pin adjusts the peak current limit of the SenseFET. The 0.9mA feedback current source is diverted to the parallel combination of an internal 2.8k resistor and any external resistor to GND on this pin. This determines the peak current limit. If this pin is tied to VCC or left floating, the typical peak current limit is 0.8A (FSQ0170RNA), 0.9A (FSQ0270RNA). 5 Vstr Start-up. This pin connects to the rectified AC line voltage source. At start-up, the internal switch supplies internal bias and charges an external storage capacitor placed between the VCC pin and ground. Once the VCC reaches 12V, the internal switch is opened. 6 Drain SenseFET drain. High-voltage power SenseFET drain connection. 7 Drain SenseFET drain. High-voltage power SenseFET drain connection. 8 Drain SenseFET drain. High-voltage power SenseFET drain connection. 2 3 4 © 2006 Fairchild Semiconductor Corporation FSQ0170RNA, FSQ0270RNA Rev. 1.0.5 www.fairchildsemi.com 3 FSQ0170RNA, FSQ0270RNA — Green Mode Fairchild Power Switch (FPS™) Pin Configuration Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only Symbol VDRAIN VSTR Characteristic Value Unit Drain Pin Voltage 700 V Vstr Pin Voltage 700 V IDM Drain Current Pulsed(5) EAS Single Pulsed Avalanche Energy(6) VCC Supply Voltage VFB Feedback Voltage Range PD Total Power Dissipation TJ Operating Junction Temperature TA TSTG FSQ0170RNA 4 FSQ0270RNA 8 FSQ0170RNA 50 FSQ0270RNA 140 A mJ 20 V -0.3 to VCC V 1.5 W Internally limited C Operating Ambient Temperature -25 to +85 C Storage Temperature -55 to +150 C Notes: 5. Non-repetitive rating: Pulse width is limited by maximum junction temperature. 6. L = 51mH, starting TJ = 25C. Thermal Impedance TA = 25C, unless otherwise specified. All items are tested with the standards JESD 51-2 and 51-10 (DIP). Symbol Parameter JA Junction-to-Ambient Thermal JC Junction-to-Case Thermal Resistance(8) JT Junction-to-Top Thermal Resistance(7) Resistance(9) Value Unit 80 C/W 20 C/W 35 C/W Notes: 7. Free standing with no heatsink; without copper clad. (Measurement Condition - Just before junction temperature TJ enters into OTP.) 8. Measured on the DRAIN pin close to plastic interface. 9. Measured on the PKG top surface. © 2006 Fairchild Semiconductor Corporation FSQ0170RNA, FSQ0270RNA Rev. 1.0.5 www.fairchildsemi.com 4 FSQ0170RNA, FSQ0270RNA — Green Mode Fairchild Power Switch (FPS™) Absolute Maximum Ratings TA = 25C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit (10) SenseFET Section IDSS RDS(ON) Zero-Gate-Voltage Drain Current Drain-Source On-State Resistance(11) CISS Input Capacitance COSS Output Capacitance CRSS Reverse Transfer Capacitance td(on) Turn-On Delay Time tr td(off) tf VDS = 700V, VGS = 0V 50 VDS = 560V, VGS = 0V, TC = 125C 200 FSQ0170RNA FSQ0270RNA 6.0 7.2 FSQ0270RNA 550 25 VGS = 0V, VDS = 25V, f = 1MHz 10 FSQ0270RNA 17 FSQ0170RNA 12 FSQ0270RNA 20 FSQ0170RNA 4 FSQ0170RNA 15 VDS = 350V, ID = 1.0A ns 30 FSQ0270RNA 55 FSQ0170RNA 10 FSQ0270RNA 25  pF 38 FSQ0170RNA FSQ0270RNA Fall Time 11 250 FSQ0270RNA Turn-Off Delay Time 8.8 FSQ0170RNA FSQ0170RNA Rise Time VGS = 10V, ID = 0.5A A Control Section fOSC Switching Frequency 92 100 108 KHz ±5 ±10 % 55 60 65 % 0 0 0 % VFB = GND 11 12 13 VFB = GND 7 8 9 VFB = GND 0.7 0.9 1.1 fOSC Switching Frequency Variation(10) -25C TA 85C DMAX Maximum Duty Cycle Measured at 0.1 x VDS DMIN Minimum Duty Cycle VSTART VSTOP IFB tS/S UVLO Threshold Voltage Feedback Source Current (10) Internal Soft-Start Time VFB = 4V © 2006 Fairchild Semiconductor Corporation FSQ0170RNA, FSQ0270RNA Rev. 1.0.5 10 V mA ms www.fairchildsemi.com 5 FSQ0170RNA, FSQ0270RNA — Green Mode Fairchild Power Switch (FPS™) Electrical Characteristics TA = 25C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit 0.5 0.6 0.7 V Burst-Mode Section VBURH VBURL TJ 25C Burst-Mode Voltage VBUR(HYS) 0.3 0.4 0.5 V 100 200 300 mV Protection Section FSQ0170RNA di/dt = 170mA/µs 0.70 0.80 0.90 FSQ0270RNA di/dt = 200mA/µs 0.79 0.90 1.01 ILIM Peak Current Limit tCLD Current Limit Delay Time(10) (10) 500 ns C TSD Thermal Shutdown Temperature 125 140 VSD Shutdown Feedback Voltage 5.5 6.0 VOVP Over-Voltage Protection IDELAY Shutdown Delay Current tLEB VFB = 4V Leading Edge Blanking Time(10) A 18 19 3.5 5.0 6.5 V 6.5 A V 200 ns Total Device Section IOP Operating Supply Current (Control Part Only) VCC = 14V ICH Startup Charging Current VCC = 0V, RSTR