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FSCQ-Series: FSCQ0565RT / FSCQ0765RT / FSCQ0965RT / FSCQ1265RT / FSCQ1565RT Green Mode Fairchild Power Switch (FPS™) Features Description Optimized for Quasi-Resonant Converter (QRC) Pulse-by-Pulse Current Limit A Quasi-Resonant Converter (QRC) typically shows lower EMI and higher power conversion efficiency compared to a conventional hard-switched converter with a fixed switching frequency.
FSCQ-Series — Green Mode Fairchild Power Switch (FPS™) Typical Circuit VO AC IN FSCQ-Series Drain PWM Sync GND VCC VFB Figure 1. Table 1. Maximum Output Power Typical Flyback Application (1) 230 VAC ±15%(2) Product Open Frame (3) 85–265 VAC Open Frame(3) FSCQ0565RT 70 W 60 W FSCQ0765RT 100 W 85 W FSCQ0965RT 130 W 110 W FSCQ1265RT 170 W 140 W FSCQ1565RT 210 W 170 W Notes: 1. The junction temperature can limit the maximum output power. 2. 230 VAC or 100/115 VAC with doubler.
Sync 5 Vcc 3 Drain 1 + Threshold Quasi-Resonant (QR) Switching Controller - + fs - Soft Start 4.6V/2.6V : Normal QR 3.0V/1.8V : Extended QR Burst Mode Controller VBurst Normal Operation Vref IBFB Vcc good Auxiliary Vref OSC Burst Switching Vref Main Bias Normal Operation Vref IFB 9V/15V Internal Bias IB Vcc Idelay VFB PWM 4 2.
Figure 3. 5 SYNC 4 VFB 3 VCC 2 GND 1 DRAIN Pin Assignments (Top View) Pin Descriptions Pin Name Description 1 DRAIN 2 GND This pin is the control ground and the SenseFET source. 3 VCC This pin is the positive supply input. This pin provides internal operating current for both startup and steady-state operation. 4 VFB 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.
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.
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.
TA= 25°C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit SenseFET Part BVDSS Drain-Source Breakdown Voltage VGS = 0 V, ID = 250 μA IDSS Zero Gate Voltage Drain Current VDS = 650 V,VGS = 0 V RDS(ON) Drain-Source On-State Resistance 650 250 FSCQ0565RT VGS = 10 V, ID = 1 A 1.76 2.20 FSCQ0765RT VGS = 10 V, ID = 1 A 1.40 1.60 FSCQ0965RT VGS = 10 V, ID = 1 A 1.00 1.20 FSCQ1265RT VGS = 10 V, ID = 1 A 0.75 0.90 FSCQ1565RT VGS = 10 V, ID = 1 A 0.53 0.
TA= 25°C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit Sync Section VSH1 Sync Threshold in Normal QR (H) 4.2 4.6 5.0 V VSL1 Sync Threshold in Normal QR (L) 2.3 2.6 2.9 V VSH2 Sync Threshold in Extended QR (H) 2.7 3.0 3.3 V VSL2 Sync Threshold in Extended QR (L) 1.6 1.8 2.
Figure 4. Operating Supply Current Figure 6. Figure 8. Figure 5. Startup Current Figure 7. Stop Threshold Voltage © 2006 Fairchild Semiconductor Corporation FSQ-Series • Rev. 1.1.3 Burst Mode Supply Current (Non-Switching) Figure 9. Start Threshold Voltage Initial Frequency www.fairchildsemi.
Figure 10. Maximum Duty Cycle Figure 12. Shutdown Delay Current Figure 14. Feedback Source Current © 2006 Fairchild Semiconductor Corporation FSQ-Series • Rev. 1.1.3 Figure 11. Figure 13. Figure 15. Over-Voltage Protection Shutdown Feedback Voltage Burst Mode Feedback Source Current www.fairchildsemi.
Figure 16. Figure 18. Figure 20. Feedback Offset Voltage Figure 17. Sync. Threshold in Normal QR(H) Figure 19. Sync. Threshold in Extended QR(H) © 2006 Fairchild Semiconductor Corporation FSQ-Series • Rev. 1.1.3 Figure 21. Burst Mode Enable Feedback Voltage Sync. Threshold in Normal QR(L) Sync. Threshold in Extended QR(L) www.fairchildsemi.
Figure 22. Figure 24. Extended QR Enable Frequency Figure 23. Extended QR Disable Frequency Pulse-by-Pulse Current Limit © 2006 Fairchild Semiconductor Corporation FSQ-Series • Rev. 1.1.3 www.fairchildsemi.
1. Startup: Figure 25 shows the typical startup circuit and the transformer auxiliary winding for the FSCQ series. Before the FSCQ series begins switching, it consumes only startup current (typically 25 μA). The current supplied from the AC line charges the external capacitor (Ca1) that is connected to the VCC pin. When VCC reaches the start voltage of 15 V (VSTART), the FSCQ series begins switching and its current consumption increases to IOP.
Vds Vgs 2VRO VRO VRO Vds tQ Vsync VDC Vsypk Vrh (4.6V) Ids Vrf (2.6V) Ipk tR MOSFET Gate Figure 28. Quasi-Resonant Operation Waveforms The minimum drain voltage is indirectly detected by monitoring the VCC winding voltage, as shown in Figure 27 and Figure 29. Choose voltage dividers, RSY1 and RSY2, so that the peak voltage of the sync signal (V sypk) is lower than the OVP voltage (12 V) to avoid triggering OVP in normal operation.
VCC Vref Idelay 2VRO Vfb VO IFB 4 H11A817A D2 2.5R + Vfb* KA431 VSD 3V 2.6V Figure 32. OLP Rsense Pulse Width Modulation (PWM) Circuit 1.8V 4. Protection Circuits: The FSCQ series has several self-protective functions such as overload protection (OLP), abnormal over-current protection (AOCP), overvoltage protection (OVP), and thermal shutdown (TSD). OLP and OVP are auto-restart mode protections, while TSD and AOCP are latch mode protections.
4.2 Abnormal Over Current Protection (AOCP): When the secondary rectifier diodes or the transformer pins are shorted, a steep current with extremely high di/dt can flow through the SenseFET during the LEB time. Even though the FSCQ series has OLP (Overload Protection), it is not enough to protect the FSCQ series in that abnormal case, since severe current stress will be imposed on the SenseFET until the OLP triggers.
Figure 38 shows the burst mode operation waveforms. When the picture ON signal is disabled, Q1 is turned off and R3 and Dz are connected to the reference pin of stby KA431 through D1. Before Vo2 drops to Vo2 , the voltage on the reference pin of KA431 is higher than 2.5 V, which increases the current through the opto LED. This pulls down the feedback voltage (VFB) of FSCQ series and forces FSCQ series to stop switching. If the switching is disabled longer than 1.
(b) FSCQ-Series — Green Mode Fairchild Power Switch (FPS™) (a) (c) Vo2norm Vo2stby VFB 0.4V Iop IOP IOB Vds Picture On Picture On Picture Off Burst Mode 0.4V 0.3V VFB 0.4V 0.4V Vds 1.4ms Ids 1.4ms 0.9A 0.9A (a) Mode Change to Burst Operation Figure 38. © 2006 Fairchild Semiconductor Corporation FSQ-Series • Rev. 1.1.3 1.4ms (b) Burst Operation (c) Mode Change to Normal Operation Burst Operation Waveforms www.fairchildsemi.
Application Output Power Input Voltage Output Voltage (Max. Current) 12 V (0.5 A) C-TV 18 V (0.3 A) Universal Input (90–270 Vac) 59 W 125 V (0.3 A) 24 V (0.
EER3540 Np1 1 18 2 17 3 16 4 15 N24V Na N18V Np2 N125V/2 N125V/2 Np2 5 14 6 13 N125V/2 N12V N24V N12V Na 7 12 N125V/2 8 11 Np1 9 10 N18V Figure 40. Transformer Schematic Diagram Winding Specification No Pin (s→f) Wire Turns Winding Method Np1 1–3 0.5φ × 1 32 Center Winding N125V/2 16–15 0.5φ × 1 32 Center Winding N24V 18–17 0.4φ × 2 13 Center Winding N12V 12–13 0.5φ × 2 7 Center Winding Np2 3–4 0.5φ × 1 32 Center Winding N125V/2 15–14 0.
Part Value Note FUSE 250 V / 2 A Part Value BEAD101 BEAD BEAD201 5 μH Fuse Note Inductor NTC 3A Diode RT101 5D-9 D101 1N4937 1 A, 600 V R101 100 kΩ 0.25 W D102 1N4937 1 A, 600 V R102 150 kΩ 0.25 W D103 1N4148 0.15 A, 50 V R103 5.1 Ω 0.25 W D104 Short R104 1.5 kΩ 0.25 W D105 Open R105 470 Ω 0.25 W ZD101 1N4746 R106 1.5 kΩ 1W ZD102 Open R107 Open ZD201 1N5231 5.1 V, 0.5 W R201 1 kΩ 0.25 W D201 1N4148 0.15 A, 50 V R202 1 kΩ 0.
Application Output Power Input Voltage Output Voltage (Max. Current) 12 V (1 A) C-TV 18 V (0.5 A) Universal Input (90–270 Vac) 83 W 125 V (0.4 A) 24 V (0.
EER3540 Np1 1 18 2 17 3 16 4 15 N24V Na N18V Np2 N125V/2 N125V/2 Np2 5 14 6 13 N125V/2 N12V N24V N12V Na 7 12 N125V/2 8 11 Np1 9 10 N18V Figure 42. Transformer Schematic Diagram Winding Specification No Pin (s→f) Wire Turns Winding Method Np1 1–3 0.5φ × 1 32 Center Winding N125V/2 16–15 0.5φ × 1 32 Center Winding N24V 18–17 0.4φ × 2 13 Center Winding N12V 12–13 0.5φ × 2 7 Center Winding Np2 3–4 0.5φ × 1 32 Center Winding N125V/2 15–14 0.
Part Value Note FUSE 250 V / 2 A Part Value BEAD101 BEAD BEAD201 5 μH Fuse Note Inductor NTC 3A Diode RT101 5D-9 D101 1N4937 1 A, 600 V R101 100 kΩ 0.25 W D102 1N4937 1 A, 600 V R102 150 kΩ 0.25 W D103 1N4148 0.15 A, 50 V R103 5.1 Ω 0.25 W D104 Short R104 1.5 kΩ 0.25 W D105 Open R105 470 Ω 0.25 W ZD101 1N4746 R106 1.5 kΩ 1W ZD102 Open R107 Open ZD201 1N5231 5.1 V, 0.5 W R201 1 kΩ 0.25 W D201 1N4148 0.15 A, 50 V R202 1 kΩ 0.
Application Output Power Input Voltage Output Voltage (Max. Current) 12 V (0.5 A) C-TV 18 V (0.5 A) Universal Input (90–270 Vac) 102 W 125 V (0.5 A) 24 V (1.
EER3540 Np1 1 18 2 17 3 16 4 15 5 14 6 13 N24V Na N18V Np2 N125V/2 N125V/2 Np2 N125V/2 N12V N24V N12V Na 7 12 N125V/2 8 11 Np1 9 10 N18V Figure 44. Transformer Schematic Diagram Winding Specification No Pin (s→f) Wire Turns Winding Method Np1 1–3 0.5φ × 1 32 Center Winding N125V/2 16–15 0.5φ × 1 32 Center Winding N24V 18–17 0.4φ × 2 13 Center Winding N12V 12–13 0.5φ × 2 7 Center Winding Np2 3–4 0.5φ × 1 32 Center Winding N125V/2 15–14 0.
Part Value Note FUSE 250 V / 3 A Part Value BEAD101 BEAD BEAD201 5 μH Fuse Note Inductor NTC 3A Diode RT101 5D-9 D101 1N4937 1 A, 600 V R101 100 kΩ 0.25 W D102 1N4937 1 A, 600 V R102 150 kΩ 0.25 W D103 1N4148 0.15 A, 50 V R103 5.1 Ω 0.25 W D104 Short R104 1.5 kΩ 0.25 W D105 Open R105 470 Ω 0.25 W ZD101 1N4746 R106 1.5 kΩ 1W ZD102 Open R107 Open ZD201 1N5231 5.1 V, 0.5 W R201 1 kΩ 0.25 W D201 1N4148 0.15 A, 50 V R202 1 kΩ 0.
Application Output Power Input Voltage Output Voltage (Max. Current) 8.5 V (0.5 A) C-TV 15 V (0.5 A) Universal Input (90–270 Vac) 132 W 140 V (0.6 A) 24 V (1.
EER4042 Np1 1 18 2 17 3 16 4 15 5 14 N24V Na N15V Np2 N8.5V N140V/2 N140V/2 N140V/2 NP2 6 13 N140V/2 N8.5V Na 7 12 8 11 9 10 NP1 N24V N15V Figure 46. Transformer Schematic Diagram Winding Specification No Pin (s→f) Wire Turns Winding Method N24 18–17 0.65φ × 2 8 Space Winding NP1 1–3 0.1φ × 10 × 2 20 Center Winding N140V/2 16–15 0.1φ × 10 × 2 23 Center Winding Np2 3–4 0.1φ × 10 × 2 20 Center Winding N140V/2 15–14 0.1φ × 10 × 2 22 Center Winding N8.
Part Value Note FUSE 250 V / 5 A Part Value BEAD101 BEAD BEAD201 5 μH Fuse Note Inductor NTC 3A Diode RT101 5D-11 D101 1N4937 1 A, 600 V R101 100 kΩ 0.25 W D102 1N4937 1 A, 600 V R102 150 kΩ 0.25 W D103 1N4148 0.15 A, 50 V R103 5.1 Ω 0.25 W D104 Short R104 1.5 kΩ 0.25 W D105 Open R105 470 Ω 0.25 W ZD101 1N4746 R106 1 kΩ 1W ZD102 Open R107 Open ZD201 1N5231 5.1 V, 0.5 W R201 1 kΩ 0.25 W D201 1N4148 0.15 A, 50 V R202 1 kΩ 0.
Application Output Power Input Voltage Output Voltage (Max. Current) 8.5 V (0.5 A) C-TV 15 V (0.5 A) Universal Input (90–270 Vac) 160 W 140 V (0.8 A) 24 V (1.
18 2 17 3 16 4 15 5 14 N24V Na N15V Np2 N8.5V N140V/2 N140V/2 N140V/2 NP2 6 13 N140V/2 N8.5V Na 7 12 8 11 9 10 NP1 N24V N15V Figure 48. Transformer Schematic Diagram Winding Specification No Pin (s→f) Wire Turns Winding Method N24 18–17 0.65φ × 2 5 Space Winding NP1 1–3 0.08φ × 20 × 2 13 Center Winding N140V/2 16–15 0.08φ × 20 × 2 15 Center Winding Np2 3–4 0.08φ × 20 × 2 13 Center Winding N140V/2 15–14 0.08φ × 20 × 2 14 Center Winding N8.5V 12–13 0.
Part Value Note FUSE 250 V / 5 A Part Value BEAD101 BEAD BEAD201 5 μH Fuse Note Inductor NTC 3A Diode RT101 6D-22 D101 1N4937 1 A, 600 V R101 100 kΩ 0.25 W D102 1N4937 1 A, 600 V R102 150 kΩ 0.25 W D103 1N4148 0.15 A, 50 V R103 5.1 Ω 0.25 W D104 Short R104 1.5 kΩ 0.25 W D105 Open R105 470 Ω 0.25 W ZD101 1N4746 R106 1 kΩ 1W ZD102 Open R107 Open ZD201 1N5231 5.1 V, 0.5 W R201 1 kΩ 0.25 W D201 1N4148 0.15 A, 50 V R202 1 kΩ 0.
FSCQ-Series — Green Mode Fairchild Power Switch (FPS™) PCB Layout Figure 49. Figure 50. © 2006 Fairchild Semiconductor Corporation FSQ-Series • Rev. 1.1.3 Top View Bottom View www.fairchildsemi.
10.36 9.96 B Ø B 7.00 3.28 3.08 3.40 3.20 6.88 6.48 16.07 15.67 2.74 2.34 B 1x 45° B (16.08 ) B B 18.70 17.70 11.13 10.13 1.00 MAX (3x) 1.26 1.30 MAX (2x) 1 B 5 0.70 (5X) 0.50 B 2.74 2.34 1.70 (3x) 1.30 B 2 4 B 4.90 4.50 B 5.50 4.50 3.48 2.88 2.96 2.56 B 0.60 0.45 NOTES: A. EXCEPT WHERE NOTED CONFORMS TO EIAJ SC91A. B DOES NOT COMPLY EIAJ STD. VALUE. C. ALL DIMENSIONS ARE IN MILLIMETERS. D. DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH AND TIE BAR PROTRUSIONS. E.
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