FSQ110

FSQ110 — Green Mode Fairchild Power Switch (FPS™) November 2007 FSQ110 Green Mode Fairchild Power Switch (FPS™) Features Internal Avalanche-Rugged 650V SenseFET Consumes only 0.65W at 230 VAC & 0.3W 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 Description The FSQ110 consists of an integrated, current-mode, Pulse Width Modulator (PWM) and an avalanche-rugged 650V SenseFET. It is specifically designed for highperformance off-line Switch-Mode Power Supplies (SMPS) with minimal external components. The integrated PWM controller features include: a fixedfrequency generating oscillator, Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), an optimized gate turn-on/ turn-off driver, Thermal Shutdown (TSD) protection, and temperaturecompensated precision current sources for loop compensation and fault protection circuitry. Compared to a discrete MOSFET and controller or RCC switching converter solution, the FSQ110 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. Applications SMPS for STB, Low-cost DVD Related Application Notes 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 8-DIP Ordering Information Product Number FSQ110 Package 8DIP Marking Code Q110 BVDSS 650V fOSC 100kHz RDS(ON) (MAX.) 19Ω All package are lead free per JEDEC: J-STD-020B standard. FPSTM is a trademark of Fairchild Semiconductor Corporation. © 2007 Fairchild Semiconductor Corporation FSQ110 Rev. 1.0.0 www.fairchildsemi.com FSQ110 — Green Mode Fairchild Power Switch (FPS™) Application Diagram AC IN DC OUT Vstr IPK PWM FB Drain VCC GND FSQ0x70RNA Rev. 1.01 Figure 1. Typical Flyback Application Output Power Table(1) Product FSQ110 230VAC ±15%(2) Adapter 11W (3) 85–265VAC (4) Open Frame 17W Adapter 8W (3) Open Frame(4) 12W 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 2 ICH Vstr 5 Drain 6,7,8 8V/12V VBURL/VBURH VCC IDELAY VCC OSC IFB Normal 2.5R Burst R PWM VCC good Vref Internal Bias FB 3 IPK 4 S R Q Q LEB Gate Driver VSD VCC S Vovp VCC good TSD R Q Soft-Start FSQ110 Rev. 1.00 Q 1 GND Figure 2. Internal Block Diagram © 2007 Fairchild Semiconductor Corporation FSQ110 Rev. 1.0.0 www.fairchildsemi.com 2 FSQ110 — Green Mode Fairchild Power Switch (FPS™) Pin Configuration GND VCC 8-DIP FB IPK FSQ110 D D D Vstr Figure 3. Pin Configuration (Top View) Pin Definitions Pin # 1 Name GND Description Ground. SenseFET source terminal on primary side and internal control ground. 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. 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). A time delay while charging external capacitor CFB from 3V to 6V using an internal 5µA current source delay prevents false triggering under transient conditions, but still allows the protection mechanism to operate under true overload conditions. 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 2.8kΩ 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 0.7A. 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. SenseFET Drain. High-voltage power SenseFET drain connection. SenseFET Drain. High-voltage power SenseFET drain connection. SenseFET Drain. High-voltage power SenseFET drain connection. 2 VCC 3 FB 4 IPK 5 6 7 8 Vstr D D D © 2007 Fairchild Semiconductor Corporation FSQ110 Rev. 1.0.0 www.fairchildsemi.com 3 FSQ110 — Green Mode Fairchild Power Switch (FPS™) Absolute Maximum Ratings 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. TA = 25°C, unless otherwise specified. Symbol VDRAIN VSTR IDM EAS VCC VFB PD TJ TA TSTG Drain Pin Voltage Vstr Pin Voltage Drain Current Characteristic Value 650 650 1.5 Unit V V A mJ V V W °C °C °C Pulsed(5) Energy(6) Single Pulsed Avalanche Supply Voltage Feedback Voltage Range Total Power Dissipation 10 20 -0.3 to VCC 1.40 Internally limited -25 to +85 -55 to +150 Operating Junction Temperature Operating Ambient Temperature Storage Temperature Notes: 5. Repetitive rating: Pulse width is limited by maximum junction temperature. 6. L = 24mH, 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 θJA θJC Parameter Junction-to-Ambient Thermal Junction-to-Case Thermal Resistance(7) Resistance(8) Value 88.84 13.94 Unit °C/W °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. © 2007 Fairchild Semiconductor Corporation FSQ110 Rev. 1.0.0 www.fairchildsemi.com 4 FSQ110 — Green Mode Fairchild Power Switch (FPS™) Electrical Characteristics TA = 25°C unless otherwise specified. Symbol SenseFET Section(10) Parameter Condition VDS = Max. Rating VGS = 0V VDS = 0.8 Max. Rating VGS = 0V, TC = 125°C VGS = 10V, ID = 0.5A VGS = 0V, VDS = 25V, f = 1MHz Min. Typ. Max. Unit 25 μA 200 14 162 18 3.8 9.5 19 33 42 92 100 ±5 55 11 7 0.7 60 12 8 0.9 10 0.5 0.6 0.4 200 0.70 600 125 5.5 18 140 6.0 19 5.0 6.5 20 6.5 0.7 0.5 300 0.80 108 ±10 65 13 9 1.1 KHz % % V mA ms V V mV A ns °C V V μA ns 3 0.85 5 1.00 mA mA pF 19 Ω IDSS Zero-Gate-Voltage Drain Current RDS(ON) CISS COSS CRSS td(on) tr td(off) tf fOSC ΔfOSC DMAX VSTART VSTOP IFB tS/S VBURH VBURL VBUR(HYS) Drain-Source On-State Resistance(11) Input Capacitance Output Capacitance Reverse Transfer Capacitance Turn-On Delay Time Rise Time Turn-Off Delay Time Fall Time Switching Frequency Switching Frequency Maximum Duty Cycle UVLO Threshold Voltage Feedback Source Current Internal Soft-Start Time(10) Variation(10) VDS = 325V, ID = 1A ns Control Section -25°C ≤ TA ≤ 85°C Measured at 0.1 x VDS VFB = GND VFB = GND VFB = GND VFB = 4V Burst-Mode Section Burst-Mode Voltage T J = 2 5 °C 0.3 100 Peak Current Limit Current Limit Delay Thermal Shutdown Time(10) Temperature(10) di/dt = 170mA/µs 0.60 Protection Section ILIM tCLD TSD VSD VOVP IDELAY tLEB IOP ICH Shutdown Feedback Voltage Over-Voltage Protection Shutdown Delay Current Leading-Edge Blanking Time (10) VFB = 4V 3.5 200 Total Device Section Operating Supply Current (control part only) Start-Up Charging Current VCC = 14V VCC = 0V 1 0.70 Vstr Supply Voltage VCC = 0V 24 V VSTR Notes: 10. These parameters, although guaranteed, are not 100% tested in production. 11. Pulse test: Pulse width ≤ 300µs, duty ≤ 2%. 12. The ESD level of an existing product can be applied to FSQ110 because it has same ESD protection circuit. © 2007 Fairchild Semiconductor Corporation FSQ110 Rev. 1.0.0 www.fairchildsemi.com 5 FSQ110 — Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics (Control Part) These characteristic graphs are normalized at TA= 25°C. 1.2 1.0 1.2 1.0 Normalized 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Normalized 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Temperature [°C] Temperature [°C] Figure 4. Operating Frequency (fOSC) vs. TA Figure 5. Over-Voltage Protection (VOVP) vs. TA 1.2 1.0 1.2 1.0 Normalized 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Normalized 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Temperature [°C] Temperature [°C] Figure 6. Maximum Duty Cycle (DMAX) vs. TA Figure 7. Operating Supply Current (IOP) vs. TA 1.2 1.0 1.2 1.0 Normalized Normalized 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Temperature [°C] Temperature [°C] Figure 8. Start Threshold Voltage (VSTART) vs. TA © 2007 Fairchild Semiconductor Corporation FSQ110 Rev. 1.0.0 Figure 9. Stop Threshold Voltage (VSTOP) vs. TA www.fairchildsemi.com 6 FSQ110 — Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics (Continued) These characteristic graphs are normalized at TA= 25°C. 1.2 1.0 1.2 1.0 Normalized 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Normalized 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Temperature [°C] Temperature [°C] Figure 10. Feedback Source Current (IFB) vs. TA Figure 11. Start-Up Charging Current (ICH) vs. TA 1.2 1.0 Normalized 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Temperature [°C] Figure 12. Peak Current Limit (ILIM) vs. TA © 2007 Fairchild Semiconductor Corporation FSQ110 Rev. 1.0.0 www.fairchildsemi.com 7 FSQ110 — Green Mode Fairchild Power Switch (FPS™) Functional Description 1. Startup: In previous generations of Fairchild Power Switches (FPS™), the Vstr pin required an external resistor to the DC input voltage line. In this generation, the startup resistor is replaced by an internal highvoltage current source and a switch that shuts off 10ms after the supply voltage, VCC, goes above 12V. The source turns back on if VCC drops below 8V. VIN,dc ISTR Vstr Vcc Vcc