FS8S0765RCB Fairchild Power Switch (FPS™) Features Description Burst Mode Operation to Reduce the Power FS8S0765RCB is a Fairchild Power Switch (FPS) that is specially designed for off-line SMPS of CRT monitors with minimal external components. This device is a current mode pulse-width modulated (PWM) controller combined with a high-voltage power SenseFET in a single package. The PWM controller features integrated oscillator to be synchronized with the external sync signal, under-voltage lockout, optimized gate driver, temperature compensated precise current sources for the loop compensation. This device also includes various fault-protection, circuits such as over voltage protection, overload protection, abnormal over current protection and over-temperature protection, Compared with a discrete MOSFET and PWM controller solution, FPS can reduce total cost, component count, size, weight, while increasing efficiency, productivity, and system reliability. This device is well suited for the cost-effective monitor power supply. Consumption in the Standby Mode External pin for Synchronization and Soft Start Wide Operating Frequency Range up to 150kHz Low Start-up Current (Max:80μA) Low Operating Current (Max:15mA) Pulse by Pulse Current Limiting Over-Voltage Protection (Auto Restart Mode) Overload Protection (Auto Restart Mode) Abnormal Over-Current Protection (Auto Restart Mode) Internal Thermal Shutdown (Auto Restart Mode) Under-Voltage Lockout Internal High-Voltage SenseFET Applications SMPS for Monitor TO-220-5L 1 1. Drain 2. GND 3. VCC 4. Feedback 5. Sync Ordering Information Product Number FS8S0765RCBTU Package (1) FS8S0765RCBYDTU (2) Marking Code BVDSS RDS(ON) 8S0765RC 650V 1.6Ω TO-220-5L TO-220-5L (Forming) Notes: 1. TU: Non Forming Type 2. YDTU: Forming Type FPSTM is a trademark of Fairchild Semiconductor Corporation. ©2006 Fairchild Semiconductor Corporation FS8S0765RCB Rev. 1.0.2 1 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) April 2006 Vcc 3 Vref Drain 1 Vcc Good Burst Mode Detector Vfb<0.8V Vss>3V No sync Soft start 5 & Sync Burst Mode Controller Vcc Internal Bias OSC Vref Idelay FB 9V/15V Vref Sync Detector Vref PWM IFB 4 2.5R R S Q R Q Gate driver LEB V SD Vcc Vovp TSD UVLO Reset (Vcc<9V) S Q R Q 2 GND AOCP Vocl Figure 1. Functional Block Diagram FS8S0765RCB Rev. 1.0.2 2 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Internal Block Diagram FS8S0765RC 5. Soft Start & Sink 4. Feedback 3. Vcc 2. GND 1. Drain Figure 2. Pin Configuration (Top View) Pin Definitions Pin Number Pin Name Pin Function Description 1 Drain SenseFET Drain. High voltage power SenseFET drain connection. This pin is designed to drive the transformer directly. 2 GND Ground. Control ground and the SenseFET source. 3 Vcc Supply Voltage. Supply input. This pin provides internal operating current for both start-up and steady-state operation. 4 Feedback Feedback. Internally connected to the inverting input of the PWM comparator. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 7.5V, the overload protection is activated, resulting in shutdown of FPS. 5 Soft Start & Sync FS8S0765RCB Rev. 1.0.2 Soft Start and Sync. For soft-start and synchronization to the external sync signal. 3 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Pin Configuration The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table defines the conditions for actual device operation. (TA = 25°C, unless otherwise specified) Symbol Value Unit VDSS Drain-Source (GND) Voltage (1) 650 V VDGR Drain-Gate Voltage (RGS=1MΩ) 650 V Gate-Source (GND) Voltage ±30 V Drain Current Pulsed (2) 28 Single Pulsed Avalanche Energy (3) ADC 370 mJ IAS Single Pulsed Avalanche Current (4) 17 A ID Continuous Drain Current (Tc = 25°C) 7 ADC ID Continuous Drain Current (Tc=100°C) 4.5 ADC 40 V -0.3 to Vcc V VGS IDM EAS VCC VFB VS_S PD (Watt H/S) Derating Parameter Supply Voltage Input Voltage Range Total Power Dissipation V 145 W 1.16 W/°C +150 °C Operating Ambient Temperature -25 to +85 °C Storage Temperature Range -55 to +150 °C Tj Operating Junction Temperature TA TSTG -0.3 to 10 Notes: 1. Tj=25°C to 150°C 2. Repetitive rating: Pulse width limited by maximum junction temperature 3. L=14mH, starting Tj=25°C 4. L=13μH, starting Tj=25°C FS8S0765RCB Rev. 1.0.2 4 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Absolute Maximum Ratings (TA = 25°C unless otherwise specified) Symbol Parameter BVDSS Drain Source Breakdown Voltage IDSS Zero Gate Voltage Drain Current RDS(ON) gfs Forward Transconductance Ciss Input Capacitance Coss Output Capacitance Crss td (on) tr td (off) tf Condition Static Drain Source On Resistance (1) Min. Typ. Max. Unit VGS=0V, ID=250μA 650 - - V VDS=650V, VGS=0V - - 200 μA VDS=520V VGS=0V, TC=125°C - - 300 μA VGS=10V, ID=3.5A - 1.4 1.6 W VDS=40V, ID=3.5A - 8 - mho VGS=0V, VDS=25V, f = 1MHz - 1415 - - 100 - - 15 - - 25 - Reverse Transfer Capacitance Turn On Delay Time Rise Time VDD=325V, ID=6.5A (2) Turn Off Delay Time Fall Time Qg Total Gate Charge (Gate-Source+Gate-Drain) Qgs Gate-Source Charge Qgd Gate-Drain (Miller) Charge VGS=10V, ID=6.5A, VDS=325V (2) - 60 - - 115 - - 65 - - 40 - - 7 - - 12 - pF nS nC Note: 1. Pulse test: Pulse width ≤ 300μS, duty 2% 2. MOSFET switching time is essentially independent of operating temperature. FS8S0765RCB Rev. 1.0.2 5 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Electrical Characteristics (SenseFET part) (TA=25°C unless otherwise specified) Symbol Parameter Condition Min. Typ. Max. Unit UVLO Section VSTART Start Threshold Voltage VFB=GND 14 15 16 V VSTOP Stop Threshold Voltage VFB=GND 8 9 10 V Oscillator Section FOSC Initial Frequency FSTABLE Voltage Stability ΔFOSC Temperature Stability (1) 18 20 22 kHz 12V ≤ VCC ≤ 23V 0 1 3 % -25°C ≤ TA ≤ 85°C 0 ±5 ±10 % DMAX Maximum Duty Cycle 92 95 98 % DMIN Minimum Duty Cycle - - 0 % Feedback Section IFBSO Feedback Source Current VFB=GND 0.7 0.9 1.1 mA IFBSI Feedback Sink Current VFB=4V,VCC=19V 2.4 3.0 3.6 mA VSD Shutdown Feedback Voltage VFB ≥ 6.9V 6.9 7.5 8.1 V Shutdown Delay Current VFB=5V 1.6 2.0 2.4 μA VCC ≥ 27V 34 37 - V 0.95 1.0 1.05 V 140 160 - °C 4.7 5.0 5.3 V Idelay Protection Section VOVP Over Voltage Protection VOCL Over Current Latch Voltage TSD (2) Thermal Shutdown Temp. (1) Sync & Soft-start Section VSS Soft start Voltage ISS Soft start Current VSS=0V 0.8 1.0 1.2 mA VSH Sync High Threshold Voltage VCC=16V,VFB=5V 6.7 7.2 7.9 V VSL Sync Low Threshold Voltage VCC=16V,VFB=5V 5.4 5.8 6.2 V 12 12.6 V VFB=2 Burst Mode Section (DPMS Mode) VBUH Burst Mode High Threshold Voltage VFB=0V 11.6 VBUL Burst Mode Low Threshold Voltage VFB=0V 10.6 11 11.6 V VBUFB Burst Mode Enable FB Voltage VCC=10.5V 0.9 1.0 1.1 V VBUSS Burst Mode Enable S_S Voltage VCC=10.5V,VFB=0V 2.5 3.0 3.5 V TBUDT FBU Burst Mode Enable Delay Time VCC=10.5V,VFB=0V - 0.5 - ms Burst Mode Frequency VCC=10.5V,VFB=0V 32 40 48 kHz Current Limit (Self-Protection) Section IOVER Peak Current Limit (3) 3.52 4.0 4.48 A IBU_PK Burst Mode Peak Current Limit 0.45 0.6 0.75 A - 40 80 μA - 9 15 mA Total Device Section ISTART IOP IOP(MIN) Start Up Current Operating Supply Current (4) IOP(MAX) VCC=Vstart-0.1V VFB=GND, VCC=16V VFB=GND, VCC=12V VFB=GND, VCC=27V Note: 1. These parameters, although guaranteed at the design, are not tested in mass production. 2. These parameters, although guaranteed, are tested in EDS (wafer test) process. 3. These parameters indicate inductor current. 4. These parameters are the current flowing in the control IC. FS8S0765RCB Rev. 1.0.2 6 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Electrical Characteristics (Continued) 1.20 1.20 1.15 1.15 1.10 1.10 1.05 Normalized to 25 °C Normalized to 25 °C (These characteristic graphs are normalized at TA = 25°C) 1.00 0.95 0.90 0.85 -20 0 20 40 60 80 1.00 0.95 0.90 0.85 0.80 100 120 140 160 -40 -20 0 20 80 100 120 140 160 Figure 3. Start Up Current vs. Temp. Figure 4. Operating Supply Current vs. Temp. 1.20 1.15 1.15 1.10 1.10 1.05 1.00 0.95 0.90 1.05 1.00 0.95 0.90 0.85 0.85 0.80 -40 -20 0 20 40 60 80 0.80 -40 100 120 140 160 -20 0 20 40 60 80 100 120 140 160 Temperature [°C] Temperature [°C] Figure 5. Start Threshold Voltage vs. Temp. Figure 6. Stop Threshold Voltage vs. Temp. 1.20 1.20 1.15 1.15 1.10 1.10 Normalized to 25 °C Normalized to 25 °C 60 Temperature [°C] 1.20 1.05 1.00 0.95 0.90 1.05 1.00 0.95 0.90 0.85 0.85 0.80 -40 40 Temperature [°C] Normalized to 25 °C Normalized to 25 °C 0.80 -40 1.05 -20 0 20 40 60 80 0.80 -40 100 120 140 160 0 20 40 60 80 100 120 140 160 Temperature [°C] Temperature [°C] Figure 8. Maximum Duty Cycle vs. Temp. Figure 7. Initial Freqency vs. Temp. FS8S0765RCB Rev. 1.0.2 -20 7 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Typical Performance Characteristics (Control Part) 1.7 1.20 1.6 1.5 1.15 1.4 1.10 Normalized to 25 °C Normalized to 25 °C (These characteristic graphs are normalized at TA= 25°C) 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 1.05 1.00 0.95 0.90 0.85 0.5 -40 -20 0 20 40 60 80 0.80 -40 100 120 140 160 -20 0 20 60 80 100 120 140 160 Temperature [°C] Temperature [°C] Figure 10. Feedback Sink Current vs. Temp. Figure 9. Feedback Offset Voltage vs. Temp. 1.20 1.20 1.15 1.15 1.10 1.10 Normalized to 25 °C Normalized to 25 °C 40 1.05 1.00 0.95 0.90 1.05 1.00 0.95 0.90 0.85 0.85 0.80 -40 -20 0 20 40 60 80 0.80 -40 100 120 140 160 -20 0 20 40 60 80 100 120 140 160 Temperature [°C] Figure 11. Shutdown Delay Current vs. Temp. Figure 12. Shutdown Feedback Voltage vs. Temp. 1.20 1.20 1.15 1.15 1.10 1.10 Normalized to 25 °C Normalized to 25 °C Temperature [°C] 1.05 1.00 0.95 0.90 0.85 1.05 1.00 0.95 0.90 0.85 0.80 -40 -20 0 20 40 60 80 0.80 -40 100 120 140 160 0 20 40 60 80 100 120 140 160 Temperature [°C] Temperature [°C] Figure 14. Over Voltage Protection vs. Temp. Figure 13. Soft Start Voltage vs. Temp. FS8S0765RCB Rev. 1.0.2 -20 8 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Typical Performance Characteristics (Continued) 1.20 1.20 1.15 1.15 1.10 1.10 Normalized to 25 °C Normalized to 25 °C (These characteristic graphs are normalized at TA= 25°C) 1.05 1.00 0.95 0.90 1.00 0.95 0.90 0.85 0.85 0.80 -40 1.05 -20 0 20 40 60 80 0.80 -40 100 120 140 160 -20 0 20 Temperature [°C] 1.3 1.15 Normalized to 25 °C Normalized to 25 °C 1.20 1.2 100 120 140 160 1.1 1.0 0.9 1.10 1.05 1.00 0.95 0.90 0.85 -20 0 20 40 60 80 0.80 -40 100 120 140 160 -20 0 20 40 60 80 100 120 140 160 Temperature [°C] Temperature [°C] Figure 17. Feedback Sink Current vs. Temp. Figure 18. Burst Mode Low Threshold Voltage vs. Temp. 1.20 1.20 1.15 1.15 1.10 1.10 Normalized to 25 °C Normalized to 25 °C 80 Figure 16. Peak Current vs. Temp. 1.4 1.05 1.00 0.95 0.90 0.85 0.80 -40 60 Temperature [°C] Figure 15. Normal Mode Regulation Voltage vs. Temp. 0.8 -40 40 1.05 1.00 0.95 0.90 0.85 -20 0 20 40 60 80 0.80 -40 100 120 140 160 0 20 40 60 80 100 120 140 160 Temperature [°C] Temperature [°C] Figure 19. Burst Mode High Threshold Voltage vs. Temp. FS8S0765RCB Rev. 1.0.2 -20 9 Figure 20. Burst Mode Enable Voltage vs. Temp. www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Typical Performance Characteristics (Continued) FS8S0765RCB Fairchild Power Switch (FPS™) Typical Performance Characteristics (Continued) (These characteristic graphs are normalized at TA= 25°C) 1.20 Normalized to 25 °C 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 -40 -20 0 20 40 60 80 100 120 140 160 Temperature [°C] Figure 21. Burst Mode Peak Current vs. Temp. FS8S0765RCB Rev. 1.0.2 10 www.fairchildsemi.com 3. Protection function: FS8S0765RCB has four selfprotective functions such as abnormal over current protection (AOCP), overload protection (OLP), overvoltage protection (OVP) and thermal shutdown (TSD). Because these protection circuits are fully integrated into the IC without external components, the reliability can be improved without cost increase. In the event of these fault conditions, the FPS enters into auto-restart operation. Once the fault condition occurs, switching operation is terminated and MOSFET remains off, which forces Vcc to be reduced. When Vcc reaches 9V, the protection is reset and the supply current reduces to 80 μA. Then, Vcc begin to increase with the current provided through the start-up resistor. When Vcc reaches 15V, the FPS resumes normal operation if the fault condition is removed. In this manner, the autorestart alternately enables and disables the switching of the power MOSFET until the fault condition is eliminated, as illustrated in Figure 24. 1. Start up: To guarantee stable operation of the control IC, FS8S0765RCB has UVLO circuit with 6V hysteresis band. Figure 22 shows the relation between the supply current (Icc) and the supply voltage (Vcc). Before Vcc reaches 15V, the FPS consumes only startup current of 80mA, which is usually provided by the DC link through the start-up resistor. When Vcc reaches 15V, the FPS begins operation and the operating current increases to 15mA as shown. Once the control IC starts operation, it continues normal operation until Vcc goes below the stop voltage of 9V. Icc 15mA Protection is activated (OCP,OLP,OVP or TSD) V Vds 80uA Vstop=9V Vstart=15V OVP Vcc Figure 22. High Voltage Current Source 2. Feedback Control: FS8S0765RCB employs primary side regulation, which permits elimination of feedback circuit components in the secondary side, such as optocoupler and TL431. Figure 23 shows the primary side control circuit. The primary side regulation voltage (Vpsr) is controlled to the breakdown voltage of zener diode (Dz). Because current mode control is employed, the drain current of the power MOSFET is limited by the inverting input of PWM comparator (Vfb*). When MOSFET turns on, usually there exists high current spike in the MOSFET current caused by primary-side capacitance and secondary-side rectifier reverse recovery. To prevent premature termination of the switching pulse due to the current spike, the FPS employs leading edge blanking (LEB). The leading edge blanking circuit inhibits the PWM comparator for a short time after the MOSFET is turned on. Vcc V psr Vfb DZ 15V 9V Vcc Figure 24. Auto restart operation after protection 3.1 Abnormal Over Current Protection (AOCP): When the secondary rectifying diodes or the transformer pins are shorted, a steep current with extremely high di/dt can flow during the LEB time. Therefore, the abnormal overcurrent protection (AOCP) block is added to ensure the reliability, as shown in Figure 25. It turns off the SenseFET within 300ns after the abnormal over-current condition is sensed. FB 4 OVP OSC D1 Cfb D2 OLP TSD 2.5R Vfb* Gate driver R S Q' GATE DRIVER SenseFE T R RZ UVLO V SD Auto restart time Vref 0.9m A 2uA time V Vcc PWM Comp OLP AOCP COMP. Vsense : 1V Figure 23. Pulse-Width Modulation (PWM) Circuit FS8S0765RCB Rev. 1.0.2 Figure 25. AOCP block 11 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Functional Description 3.3 Over Voltage Protection (OVP): In case of malfunction in the primary side feedback circuit or feedback loop open caused by a defect of solder, the current through primary side control transistor becomes almost zero. Then, Vfb climbs up in a similar manner to the overload situation, forcing the preset maximum current to be supplied to the secondary side until the over load protection is activated. Because more energy than required is provided to the output, the output voltage may exceed the rated voltage before the over load protection is activated, resulting in the breakdown of the devices in the secondary side. To prevent this situation, an over-voltage protection (OVP) circuit is employed. When the Vcc voltage touches 37V, the OVP block is activated. 3.4 Thermal Shutdown (TSD): The SenseFET and the control IC are built in one package. This allows the control IC to detect the heat generation from the SenseFET. If the temperature exceeds approximately 160°C, the thermal shutdown is activated. V Vds 4. Soft Start: Figure 28 shows the soft-start circuit. During the initial start up, the 0.9 mA current source leaks out through Css and Rss. As Css is charged, the leakage current decreases. By choosing much bigger Css than Cfb, it is possible to increase the feedback voltage slowly, forcing the SenseFET current to increase slowly. After Css reaches its steady state value, D3 is blocked and the soft switching circuit is decoupled from the feedback circuit. If the value of Css is too large, there is possibility that Vfb increases to 7.5V, activating the over load protection during soft start time. To avoid this situation, it is recommended that the value of Css should not exceed 100 times the Cfb. time V 22V 15V Vcc 9V Auto restart Overload protection V time 7.5V Vfb time Vref 50K Figure 26. The waveforms at the OLP and auto restart Css 5 Rss D3 VFB 2.5R Cfb Overload protection D OSC 4 2μA PWM COMP. S GATE DRIVER 0.9mA R 7.5V Voffset FS8S0765RCB 2.7V Figure 28. The circuit for the soft start T12= Cfb*(7.5-2.7)/Idelay T1 T2 t Figure 27. Overload protection FS8S0765RCB Rev. 1.0.2 12 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) 3.2 Overload Protection (OLP): When the load current exceeds a preset level for longer than the predetermined time, protection circuit should be activated to protect the SMPS. Because of the pulse-by-pulse current limit capability, the maximum peak current through the SMPS is limited, and the maximum input power is restricted with a given input voltage. If the output consumes beyond this maximum power, the output voltage, together with primary side regulation voltage, decrease below the set voltage. This reduces the current through primary side regulation transistor, which increases feedback voltage (Vfb). If Vfb exceeds 2.7V, D1 is blocked and the 2μA current source starts to charge Cfb slowly, compared to when the 0.9mA current source charges Cfb. In this condition, Vfb continues increasing until it reaches 7.5V and the switching operation is terminated at that time, as shown in Figure 27. The delay time for shutdown is the time required to charge Cfb from 2.7V to 7.5V with 2μA. operation. At the end of the section 3, the load is eliminated and the feedback voltage (Vfb) drops below 1V, forcing the FPS to stop switching operation. During the section 4, Vcc goes down to 11V. During section 5, Vcc is hysteresis controlled between 11V and 12V. When the external sync signal is applied on the pin 5, the FPS resumes normal operation. To minimize the power consumption in standby mode, it is recommended to set the value of Vcc during normal operation as high as possible (about 29V). V 5V Vsync 3V Vref V Vfb SYNC COMP. Css 5 7.2V External Sync Rss 5.8V D3 1V D OSC 4 Cfb 2.5R 2μA PWM COMP. V S GATE DRIVER 0.9mA Vds R Voffset FS8S0765RCB V Vcc Figure 29. The circuit for the synchronization with external sync Vcc 15V 12V 11V 9V 6. Burst mode operation: To minimize the power dissipation at standby mode, FS8S0765RCB has a burst mode operation. In burst mode, the FPS reduces the effective switching frequency and output voltage. The FPS enters burst mode when the voltage of the soft start pin is higher than 3V. No sync signal is applied and the feedback voltage is lower than 1V. During the burst mode operation, Vcc is hysteresis controlled between 11V and 12V. Once the FPS enters burst mode, it stops switching operation until Vcc drops to 11V. When Vcc reaches 11V, the FPS starts switching with switching frequency of 40kHz and peak MOSFET current of 0.6A until Vcc reaches 12V. When Vcc reaches 12V, the switching operation is terminated again until Vcc reduces to 11V. Figure 30 shows operating waveforms. The soft start during the initial start-up is shown in the section 1. During this period, there is no external sync signal and the switching frequency is 20kHz. The section 2 represents the normal mode operation. The switching frequency is synchronized with the external sync signal. In the section 3, the external sync signal is removed; however, the load still exists and the feedback voltage (Vfb) is higher than 1V. In this period, the FPS does the normal switching operation with switching frequency of 20kHz. The section 4 and 5 show the burst mode FS8S0765RCB Rev. 1.0.2 Section 4 Section I Section 2 Section 3 Section 5 Section 6 time Figure 30. The operation of the FS8S0765RCB at the normal mode and the off mode 13 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) 5. Synchronization: To reduce the effect of switching noise on the screen, the SMPS for monitor synchronizes its switching frequency to an external signal, typically the horizontal sync flyback signal. The switching frequency of the FPS can vary from 20 kHz to 150 kHz according to the external sync signal. The internal sync comparator detects the sync signal and determines the SenseFET turn-on time. The SenseFET is turned on at the negative edge of the sync comparator output. The reference voltage of the sync comparator is an inverted saw tooth with a base frequency of 20kHz and a varying range between 5.8V and 7.2V, as shown in the Figure 29. The inverted saw tooth reference gets rid of the excessive switching noise at the first synchronized turn-on. The external sync signal is recommended to have an amplitude higher than 4.2V. 1. 80W Universal Input Power Supply For CRT Monitor T1 D201 L201 BD101 3 C107 10nF/630V C106 220μF/400V + R101 56K/2W + - 1 16 2 15 3 14 C201 22μF/160V + R102 3.3 D102 5 4 3 C110 1μF/50V + C104 4.7nF C102 100nF C108 22μF/50V Vcc + 1 Drain 2 GND 8 C206 1000μF/25V L204 C207 1000μF/25V 7 + C208 1000μF/25V R105 560 ZD101 6.2VZD 2N3904 10 C111 0.1μF C109 47nF C101 TNR 14V D204 D103 C114 1nF + -14V D205 L205 C112 47μF/16V + R106 100 9 C301 4.7nF F101 FUSE + C205 1000μF/25V 11 FS8S0765RCB R104 2.2K 50V L203 S/S + C103 4.7nF 12 C204 47μF/100V D203 IC101 Vfb + C203 47μF/100V 13 6 100nF Line Filter: LF101 80V L202 D101 4 C105 C202 22μF/160V D202 4 R103 600K 0 RT101 + + + 2 1 + C209 1000μF/16V C210 1000μF/16V 6.5V C302 4.7nF 0 Regulator ouput_5V C113 1μF Sync trans Hsync_O 2 0.1μF 1nF 1N4148 1 C115 Micro controller DC5 V R201 0.1K 0 R202 4k KSC945 R203 0.7k Off signal On --> normal mode: Off --> off mode 2. Transformer Schematic Diagram Lm : 420uH 1 16 15 14 Np : 40T 13 12 4 11 6 10 Nvcc : 12T Nreg : 3T FS8S0765RCB Rev. 1.0.2 Nvo2 : 22T Nvo3 : 6T Nvo4 : 5T Nvo5 : 3T 7 8 Nvo1 : 10T 9 14 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Typical Application Circuit No Pin (s→f) Wire Turns Winding Method 4→1 φ 40 Solenoid Winding 10 Center Winding 3 Solenoid Winding 22 Center Winding 40 Solenoid Winding 6 Solenoid Winding 5 Solenoid Winding 3 Solenoid Winding 12 Solenoid Winding Np1 0.3 × 1 Insulation: Polyester Tape t = 0.050mm, 2 Layers 16 → 15 Nvo1 0.3φ × 1 Insulation: Polyester Tape t = 0.050mm, 2 Layers 7→8 Nreg 0.2φ × 1 Insulation: Polyester Tape t = 0.050mm, 2 Layers 14 → 13 Nvo2 0.3φ × 3 Insulation: Polyester Tape t = 0.050mm, 2 Layers 4→1 Np2 0.3φ × 1 Insulation: Polyester Tape t = 0.050mm, 2 Layers 12 → 9 Nvo3 0.3φ × 2 Insulation: Polyester Tape t = 0.050mm, 2 Layers 9 → 11 Nvo4 0.3φ × 1 Insulation: Polyester Tape t = 0.050mm, 2 Layers 10 → 9 Nvo5 0.3φ × 2 Insulation: Polyester Tape t = 0.050mm, 2 Layers 6→8 Nvcc 0.2φ × 1 Outer Insulation: Polyester Tape t = 0.050mm, 2 Layers 4. Electrical Characteristics Pin Specification Remarks Inductance 1-4 420μH ± 10% 300kHz, 1V Leakage Inductance 1-4 5μH Max 2nd all short 5. Core & Bobbin Core: EER 3540 Bobbin: EER3540 Ae(mm2): 107 FS8S0765RCB Rev. 1.0.2 15 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) 3. Winding Specification Part Value Note Fuse F101 3A/250V RT101 10D-9 NTC Resistor R101 Part Value Note C201 22nF/160V Electrolytic Capacitor C202 22nF/160V Electrolytic Capacitor C203 47nF/100V Electrolytic Capacitor C204 47nF/100V Electrolytic Capacitor C205 1000nF/25V Electrolytic Capacitor 56kΩ 2W C206 1000nF/25V Electrolytic Capacitor R102 3.3Ω 1/4W C207 1000nF/25V Electrolytic Capacitor R103 600kΩ 1W C208 1000nF/25V Electrolytic Capacitor R104 2.2kΩ 1/4W C209 1000nF/25V Electrolytic Capacitor R105 0.56kΩ 1/4W C210 1000nF/25V Electrolytic Capacitor R106 0.1kΩ 1/4W C211 0.1μF/50V Ceramic Capacitor R201 0.1kΩ 1/4W C301 4.7nF AC Filter Capacitor R202 4kΩ 1/4W C302 4.7nF AC Filter Capacitor R203 0.7kΩ 1/4W Sync trans 22mH Inductor L201 ~ L205 13uH Diode Capacitor D101 UF4007 D102 TVR10G C101 471D10 TNR D103 TVR10G C102 100nF Box Capacitor D201 UF4007 C103 4.7nF AC Filter Capacitor D202 UF5404 C104 4.7nF AC Filter Capacitor D203 UF5402 C105 100nF Box Capacitor D204 UF5402 C106 220μF/400V Electrolytic Capacitor D205 UF5401 C107 10nF/630V Ceramic Capacitor C108 22μF/50V Electrolytic Capacitor BD101 KBL406 C109 47nF/50V Ceramic Capacitor C110 1μF/50V Electrolytic Capacitor LF101 24mH C111 0.1μF/50V Ceramic Capacitor C112 47μF/50V Electrolytic Capacitor IC101 FS8S0765RC (7A, 650V) IC201 KSC945 NPN Transistor C113 1μF/50v Electrolytic Capacitor C114 1nF/50V Ceramic Capacitor C115 1nF/50V Ceramic Capacitor FS8S0765RCB Rev. 1.0.2 Bridge Diode Line Filter IC 16 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) 6. Demo Circuit Part List TO-220-5L Dimensions in millimeters June 2002, Rev. C FS8S0765RCB Rev. 1.0.2 17 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Package Dimensions TO-220-5L (Forming) Dimensions in millimeters June 2002, Rev. A FS8S0765RCB Rev. 1.0.2 18 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) Package Dimensions (Continued) The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACEx™ FAST® FASTr™ ActiveArray™ FPS™ Bottomless™ FRFET™ Build it Now™ GlobalOptoisolator™ CoolFET™ GTO™ CROSSVOLT™ HiSeC™ DOME™ I2C™ EcoSPARK™ i-Lo™ E2CMOS™ EnSigna™ ImpliedDisconnect™ FACT™ IntelliMAX™ FACT Quiet Series™ Across the board. Around the world.™ The Power Franchise® Programmable Active Droop™ ISOPLANAR™ LittleFET™ MICROCOUPLER™ MicroFET™ MicroPak™ MICROWIRE™ MSX™ MSXPro™ OCX™ OCXPro™ OPTOLOGIC® OPTOPLANAR™ PACMAN™ POP™ Power247™ PowerEdge™ PowerSaver™ PowerTrench® QFET® QS™ QT Optoelectronics™ Quiet Series™ RapidConfigure™ RapidConnect™ μSerDes™ ScalarPump™ SILENT SWITCHER® SMART START™ SPM™ Stealth™ SuperFET™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 SyncFET™ TCM™ TinyLogic® TINYOPTO™ TruTranslation™ UHC™ UniFET™ UltraFET® VCX™ Wire™ DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. Rev. I19 FS8S0765RCB Rev. 1.0.2 19 www.fairchildsemi.com FS8S0765RCB Fairchild Power Switch (FPS™) TRADEMARKS