FAN7602C Green Current Mode PWM Controller Features Description Green Current Mode PWM Controller The FAN7602C is a green current-mode PWM controller. It is specially designed for off-line adapter applications; DVDP, VCR, LCD monitor applications; and auxiliary power supplies. Random Frequency Fluctuation for Low EMI Internal High-Voltage Startup Switch Burst Mode Operation Line Voltage Feedforward to Limit Maximum Power Line Under-Voltage Protection Latch Protection & Internal Soft-Start (10ms) Function Overload Protection (OLP) The internal high-voltage startup switch and the burst mode operation reduce the power loss in standby mode. As a result, the input power is lower than 1 W when the input line voltage is 265 VAC and the load is 0.5 W. At no-load condition, input power is under 0.15 W. The maximum power can be limited constantly, regardless of the line voltage change, using the power limit function. Over-Voltage Protection (OVP) Over-Temperature Protection (OTP) Low Operation Current: 1 mA Typical The switching frequency is not fixed and has random frequency fluctuation. Available in the 8-Lead SOP Package The FAN7602C includes various protections for the system reliability and the internal soft-start prevents the output voltage over-shoot at startup. Applications Adapter LCD Monitor Power Auxiliary Power Supply Related Resources AN-6014- Green Current Mode PWM Controller (Except for frequency fluctuation part in AN-6014) Ordering Information Part Number Operating Junction Temperature Package Packing Method Top Mark FAN7602CMX -40°C to +150°C 8-Lead Small Outline Package (SOP) Tape and Reel FAN7602C © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com FAN7602C — Green Current Mode PWM Controller November 2013 FAN7602C — Green Current Mode PWM Controller Typical Application Diagram VSTR LUVP Latch/ Plimit CS/FB NC FAN7602C GND VCC Out Figure 1. Typical Flyback Application Internal Block Diagram VSTR 8 6 VCC LUVP LUVP 1 OVP OLP 2V/1.5V SS End Auto Restart Protection TSD 19V 5V Ref OVP Latch 12V/8V Reset Circuit Latch Protection UVLO VCC 10ms Soft-Start Driver Circuit SS End Plimit Offset PWM Block OSC 5 OUT Delay Circuit Random 3 CS/FB 0.95V/0.88V Latch/ 2 Plimit Latch PWM+ OLP SoftStart 4V Plimit Offset Generator Plimit Offset Power Limit Plimit Offset OLP 4 GND Soft-Start Figure 2. Functional Block Diagram © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 2 VSTR NC VCC Out 8 7 6 5 FAN7602C YWW 1 2 3 4 LUVP Latch/ Plimit CS/FB GND Figure 3. Pin Configuration (Top View) Pin Definitions Pin # Name Description 1 LUVP 2 Latch/Plimit 3 CS/FB 4 GND Ground Pin. This pin is used for the ground potential of all the pins. For proper operation, the signal ground and the power ground should be separated. 5 OUT Gate Drive Output Pin. This pin is an output pin to drive an external MOSFET. The peak sourcing current is 450 mA and the peak sinking current is 600 mA. For proper operation, the stray inductance in the gate driving path must be minimized. 6 VCC Supply Voltage Pin. IC operating current and MOSFET driving current are supplied using this pin. 7 NC No Connection. 8 VSTR Startup Pin. This pin is used to supply IC operating current during IC startup. After startup, the internal JFET is turned off to reduce power loss. Line Under-Voltage Protection Pin. This pin is used to protect the set when the input voltage is lower than the rated input voltage range. Latch Protection and Power Limit Pin. When the pin voltage exceeds 4 V, the latch protection works. The latch protection is reset when the VCC voltage is lower than 5 V. For the power limit function, the OCP level decreases as the pin voltage increases. Current Sense and Feedback Pin. This pin is used to sense the MOSFET current for the current mode PWM and OCP. The output voltage feedback information and the current sense information are added using an external RC filter. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 3 FAN7602C — Green Current Mode PWM Controller 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 Parameter Min. Max. Unit 25 V VCC Supply Voltage IO Output Current -600 +450 mA VCS/FB CS/FB Input Voltage -0.3 20.0 V VLUVP LUVP Input Voltage -0.3 10.0 V VLatch Latch/Plimit Input Voltage -0.3 10.0 V VSTR VSTR Input Voltage 600 V TJ TSTG PD ESD Junction Temperature +150 °C Recommended Operating Junction Temperature -40 +150 Storage Temperature Range -55 +150 °C 1.2 W Power Dissipation Electrostatic Discharge Capability Human Body Model, JESD22-A114 3500 Charged Device Model, JESD22-C101 2000 V Thermal Impedance Symbol θJA Parameter (1) Thermal Resistance , Junction-to-Ambient Value Unit 150 °C/W Note: 1. Regarding the test environment and PCB type, please refer to JESD51-2 and JESD51-10. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 4 FAN7602C — Green Current Mode PWM Controller Absolute Maximum Ratings VCC = 14V, TA = -25°C~125°C, unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit VSTR = 30 V, TA = 25°C 0.7 1.0 1.4 mA Startup Section ISTR VSTR Startup Current Under Voltage Lock Out Section Vth_start Start Threshold Voltage VCC Increasing 11 12 13 V Vth_stop Stop Threshold Voltage VCC Decreasing 7 8 9 V HY_UVLO UVLO Hysteresis 3.6 4.0 4.4 V Supply Current Section IST Startup Supply Current TA = 25°C 250 320 µA ICC Operating Supply Current Output Not Switching 1.0 1.5 mA 5 10 15 ms 59 65 73 kHz Soft-Start Section tSS Soft-Start Time (2) PWM Section fOSC Operating Frequency ∆fOSC Frequency Fluctuation VCS/FB1 tD VCS/FB = 0.2 V, TA = 25°C (2) ±3 CS/FB Threshold Voltage Propagation Delay to Output DMAX Maximum Duty Cycle DMIN Minimum Duty Cycle TA = 25°C 0.9 (2) 70 kHz 1.0 1.1 V 100 150 ns 75 80 % 0 % Burst Mode Section VCS/FB2 Burst On Threshold Voltage TA = 25°C 0.84 0.95 1.06 V VCS/FB3 Burst Off Threshold Voltage TA = 25°C 0.77 0.88 0.99 V VLatch/Plimit = 2 V, TA = 25°C 0.12 0.16 0.20 11.5 12.0 14.0 V Power Limit Section KPlimit Offset Gain Output Section VOH Output Voltage High TA = 25°C, Isource = 100 mA VOL Output Voltage Low TA = 25°C, Isink = 100 mA 1.0 2.5 V (2) TA = 25°C, CL = 1 nF 45 150 ns (2) TA = 25°C, CL= 1 nF 35 150 ns tR Rising Time tF Falling Time Continued on the following page… © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 5 FAN7602C — Green Current Mode PWM Controller Electrical Characteristics VCC = 14V, TA = -25°C~125°C, unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit 3.6 4.0 4.4 V 20 22 24 ms 30 37 44 ms 0 0.1 V Protection Section VLATCH tOLP tOLP_ST VOLP Latch Voltage Overload Protection Time (2) Overload Protection Time at Startup Overload Protection Level VLUVPoff Line Under-Voltage Protection On to Off TA = 25°C 1.9 2.0 2.1 V VLUVPon Line Under-Voltage Protection Off to On TA = 25°C 1.4 1.5 1.6 V Over-Voltage Protection TA = 25°C 18 19 20 V VOVP TSD Shutdown Temperature (2) HYS 170 °C 60 °C Note: 2. These parameters, although guaranteed, are not 100% tested in production. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 6 FAN7602C — Green Current Mode PWM Controller Electrical Characteristics (Continued) 1.20 1.15 1.15 1.10 1.10 Normalized 1.20 1.05 1.00 0.95 1.05 1.00 0.95 0.90 0.90 0.85 0.85 0.80 0.80 -50 -25 0 25 50 75 100 -50 125 -25 0 25 50 75 100 125 Temperature [°C] Figure 5. Stop Threshold Voltage vs. Temperature 1.20 1.40 1.15 1.30 1.10 1.20 Normalized Normalized Figure 4. Start Threshold Voltage vs. Temperature 1.05 1.00 0.95 1.10 1.00 0.90 0.90 0.80 0.85 0.70 0.80 0.60 -50 -25 0 25 50 75 100 -50 125 -25 0 Figure 6. UVLO Hysteresis vs. Temperature 50 75 100 125 Figure 7. Startup Threshold Current vs. Temperature 1.50 1.20 1.40 1.15 1.30 1.10 Normalized Normalized 25 Temperature [°C] Temperature [°C] 1.20 1.10 1.00 1.05 1.00 0.95 0.90 0.90 0.85 0.80 0.80 -50 -25 0 25 50 75 100 -50 125 0 25 50 75 100 125 Temperature [°C] Temperature [°C] Figure 8. Operating Supply Current vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 -25 Figure 9. VSTR Startup Current vs. Temperature www.fairchildsemi.com 7 FAN7602C — Green Current Mode PWM Controller Typical Performance Characteristics 1.20 1.20 1.15 1.15 1.10 CSFB2 CSFB3 1.05 Normalized Normalized 1.10 1.00 0.95 1.05 1.00 0.95 0.90 0.90 0.85 0.85 0.80 0.80 -50 -25 0 25 50 75 100 125 -50 -25 0 50 75 100 125 Figure 11. Operating Frequency vs. Temperature 1.20 1.20 1.15 1.15 1.10 1.10 Normalized Normalized Figure 10. Burst On/Off Voltage vs. Temperature 1.05 1.00 0.95 1.05 1.00 0.95 0.90 0.90 0.85 0.85 0.80 0.80 -50 -25 0 25 50 75 100 -50 125 -25 0 25 50 75 100 125 Temperature [°C] Temperature [°C] Figure 12. Offset Gain vs. Temperature Figure 13. Maximum Duty Cycle vs. Temperature 1.20 1.20 1.15 1.15 1.10 1.10 Normalized Normalized 25 Temperature [°C] Temperature [°C] 1.05 1.00 0.95 1.05 1.00 0.95 0.90 0.90 0.85 0.85 0.80 0.80 -50 -25 0 25 50 75 100 -50 125 Figure 14. OVP Voltage vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 -25 0 25 50 75 100 125 Temperature [°C] Temperature [°C] Figure 15. Latch Voltage vs. Temperature www.fairchildsemi.com 8 FAN7602C — Green Current Mode PWM Controller Typical Performance Characteristics (Continued). 1.20 1.15 1.15 1.10 1.10 Normalized Normalized 1.20 1.05 1.00 0.95 1.05 1.00 0.95 0.90 0.90 0.85 0.85 0.80 0.80 -50 -25 0 25 50 75 100 -50 125 -25 0 25 50 75 100 125 Temperature [°C] Temperature [°C] Figure 16. LUVP On-to-Off Voltage vs. Temperature Figure 17. LUVP Off-to-On Voltage vs. Temperature 1.20 1.15 Normalized 1.10 1.05 1.00 0.95 0.90 0.85 0.80 -50 -25 0 25 50 75 100 125 Temperature [°C] Figure 18. CS/FB Threshold Voltage vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 9 FAN7602C — Green Current Mode PWM Controller Typical Performance Characteristics (Continued) IDS 1. Startup Circuit and Soft-Start Block tSW=1/fSW The FAN7602C contains a startup switch to reduce the power loss of the external startup circuit of the conventional PWM converters. The internal startup circuit charges the VCC capacitor with 0.9 mA current source if the AC line is connected. The startup switch is turned off 15 ms after IC starts up, as shown in Figure 19. The soft-start function starts when the VCC voltage reaches the start threshold voltage of 12 V and ends when the internal soft-start voltage reaches 1 V. The internal startup circuit starts charging the VCC capacitor again if the VCC voltage is lowered to the minimum operating voltage, 8 V. The UVLO block shuts down the output drive circuit and some blocks to reduce the IC operating current and the internal soft-start voltage drops to zero. If the VCC voltage reaches the start threshold voltage, the IC starts switching again and the soft-start block works as well. tSW ∆t fSW Figure 20. Frequency Fluctuation Waveform 3. Current Sense and Feedback Block The FAN7602C performs the current sensing for the current mode PWM and the output voltage feedback with only one pin, pin 3. To achieve the two functions with one pin, an internal Leading-Edge Blanking (LEB) circuit to filter the current sense noise is not included because the external RC filter is necessary to add the output voltage feedback information and the current sense information. Figure 21 shows the current sense and feedback circuits. RS is the current sense resistor to sense the switch current. The current sense information is filtered by an RC filter composed of RF and CF. According to the output voltage feedback information, IFB charges or stops charging CF to adjust the offset voltage. If IFB is zero, CF is discharged through RF and RS to lower the offset voltage. Startup Current Soft-Start Voltage VCC t 5ms PWM Comparator PWM+ Figure 19. Startup Current and VCC Voltage Soft-Start 2. Oscillator Block Plimit Offset RFB Power Limit CS/FB IFB RF Isw 3 The oscillator frequency is set internally and FAN7602C has a random frequency fluctuation function. CF RS Fluctuation of the switching frequency of a switched power supply can reduce EMI by spreading the energy over a wider frequency range than the bandwidth measured by the EMI test equipment. The amount of EMI reduction is directly related to the range of the frequency variation. The range of frequency variation is fixed internally; however, its selection is randomly chosen by the combination of external feedback voltage and internal free-running oscillator. This randomly chosen switching frequency effectively spreads the EMI noise nearby switching frequency and allows the use of a cost-effective inductor instead of an AC input line filter to satisfy the world-wide EMI requirements. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 MAX fSW-1/2∆fSW t VCC Soft-Start Time (10ms) MAX no repetition 8V 1.5V 1V 0.5V t fSW+1/2∆fSW several miliseconds During the soft-start, pulse-width modulated (PWM) comparator compares the CS/FB pin voltage with the soft-start voltage. The soft-start voltage starts from 0.5 V and the soft-start ends when it reaches 1 V and the softstart time is 10 ms. The startup switch is turned off when the soft-start voltage reaches 1.3 V. 12V several µseconds Figure 21. Current Sense and Feedback Circuits Figure 22 shows typical voltage waveforms of the CS/FB pin. The current sense waveform is added to the offset voltage, as shown in the Figure 22. The CS/FB pin voltage is compared with PWM that is 1 V - Plimit offset. If the CS/FB voltage meets PWM+, the output drive is shut off. If the feedback offset voltage is LOW, the switch on-time is increased. If the feedback offset voltage is HIGH, the switch on-time is decreased. In this way, the duty cycle is controlled according to the output load condition. Generally, the maximum output power increases as input voltage increases because the current slope during switch on-time increases. www.fairchildsemi.com 10 FAN7602C — Green Current Mode PWM Controller Application Information 1V 5.1 Overload Protection (OLP) The FAN7602C contains the overload protection function. If the output load is higher than the rated output current, the output voltage drops and the feedback error amplifier is saturated. The offset of the CS/FB voltage representing the feedback information is almost zero. As shown in Figure 24, the CS/FB voltage is compared with 50 mV reference when the internal clock signal is HIGH and, if the voltage is lower than 50 mV, the OLP timer starts counting. If the OLP condition persists for 22 ms, the timer generates the OLP signal. The protection is reset by the UVLO. The OLP block is enabled after the soft-start finishes. Power Limit Offset PWM+ CS/FB Clock OLP FB Offset 3 CS/FB 22ms Timer 50mV Soft-Start GND On Time Figure 24. Overload Protection Circuit (a) Low Power Limit Offset Case 1V 5.2 Line Under-Voltage Protection If the input voltage of the converter is lower than the minimum operating voltage, the converter input current increases too much, causing components failure. Therefore, if the input voltage is LOW, the converter should be protected. The LUVP circuit senses the input voltage using the LUVP pin and, if this voltage is lower than 2 V, the LUVP signal is generated. The comparator has 0.5 V hysteresis. If the LUVP signal is generated, the output drive block is shut down, the output voltage feedback loop is saturated, and the OLP works if the LUVP condition persists more than 22 ms. Power Limit Offset PWM+ CS/FB FB Offset GND On Time (b) High Power Limit Offset Case Figure 22. CS/FB Pin Voltage Waveforms VIN 4. Burst-Mode Block The FAN7602C contains the burst-mode block to reduce the power loss at a light-load and no load. A hysteresis comparator senses the offset voltage of the Burst+ for the burst mode, as shown in Figure 23. The Burst+ is the sum of the CS/FB voltage and Plimit offset voltage. The FAN7602C enters the burst mode when the offset voltage of the Burst+ is higher than 0.95 V and exits the burst mode when the offset voltage is lower than 0.88 V. The offset voltage is sensed during the switch off time. 1 + − Burst+ LUVP 2V/1.5V Figure 25. Line UVP Circuit 5.3 Latch Protection The latch protection is provided to protect the system against abnormal conditions using the Latch/Plimit pin. The Latch/Plimit pin can be used for the output overvoltage protection and/or other protections. If the Latch/ Plimit pin voltage is made higher than 4 V by an external circuit, the IC is shut down. The latch protection is reset when the VCC voltage is lower than 5 V. Offset Delay Circuit − + 3 CS/FB 0.95V/0.88V 5.4 Over-Voltage Protection (OVP) If the VCC voltage reaches 19 V, the IC shuts down and the OVP protection is reset when the VCC voltage is lower than 5 V. Figure 23. Burst-Mode Block 5. Protection Block The FAN7602C contains several protection functions to improve system reliability. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 11 FAN7602C — Green Current Mode PWM Controller To limit the output power of the converter constantly, the power limit function is included in FAN7602C. Sensing the converter input voltage through the Latch/Plimit pin, the Plimit offset voltage is subtracted from 1 V. As shown in Figure 22, the Plimit offset voltage is subtracted from 1 V and the switch on-time decreases as the Plimit offset voltage increases. If the converter input voltage increases, the switch on-time decreases, keeping the output power constant. The offset voltage is proportional to the Latch/Plimit pin voltage and the gain is 0.16. If the Latch/Plimit voltage is 1 V, the offset voltage is 0.16 V. The FAN7602C contains a single totem-pole output stage to drive a power MOSFET. The drive output is capable of up to 450 mA sourcing current and 600 mA Typical Application Circuit Application Output Power Input Voltage Output Voltage Adaptor 48 W Universal Input (85 ~ 265 VAC) 12V Features Low stand-by power (<0.15 W at 265 VAC) Constant output power control Key Design Notes All the IC-related components should be placed close to IC, especially C107 and C110. If R106 value is too low, there can be subharmonic oscillation. R109 should be designed carefully to make the VCC voltage higher than 8 V when the input voltage is 265 VAC at no load. R110 should be designed carefully to make the VCC voltage lower than OVP level when the input voltage is 85 VAC at full load. R103 should be designed to keep the MOSFET VDS voltage lower than maximum rating when the output is shorted. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 12 FAN7602C — Green Current Mode PWM Controller sinking current with typical rise and fall time of 45 ns and 35 ns, respectively, with a 1 nF load. 6. Output Drive Block R206 C204 D202 D204 1 T1 12 R103 C106 BD101 C105 9 3 R114 6 D102 R109 Q101 R105 R106 ZD101 LF1 C107 RT101 C101 4 1 Vstr LUVP 2 Latch/ Plimit 3 CS/FB 4 FAN7602C R101 OP1 NC VCC GND FUSE Out R201 R113 R107 C222 5 R102 C110 R110 C109 C103 C104 C102 C202 C201 D101 R112 L201 R202 R204 1 8 3 R203 C203 2 7 3 IC201 6 R111 R104 1 2 R205 5 D103 IC101 AC INPUT 4 OP2 3 R108 Figure 26. 1 R207 2 C108 ZD201 Schematic 2. Inductor Schematic Diagram 1 12 3mm 3mm Ns Np2 2 Np2 9 NVcc Shied Np1 3 5 Shield Ns 5 Ns Shield Ns Shied NVcc Np1 6 5 Figure 27. Inductor Schematic Diagram © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 13 FAN7602C — Green Current Mode PWM Controller 1. Schematic No. Pin ( S → F) Wire Turns Winding Method Np1 3→2 0.3 x 2 31 Solenoid Winding Copper Tape 0.9 Not Shorted 0.65 x 3 10 Solenoid Winding Copper Tape 0.9 Not Shorted 10 Solenoid Winding 31 Solenoid Winding φ Insulation: Polyester Tape t = 0.03 mm, 2-Layer Shield 5 Insulation: Polyester Tape t = 0.03 mm, 2-Layer Ns φ 12 → 9 Insulation: Polyester Tape t = 0.03 mm, 2-Layer Shield 5 Insulation: Polyester Tape t = 0.03 mm, 2-Layer NVcc φ 6→5 0.2 x 1 Insulation: Polyester Tape t = 0.03 mm, 2-Layer Np2 φ 2→1 0.3 x 2 Outer Insulation: Polyester Tape t = 0.03 mm, 2-Layer 4. Electrical Characteristics Pin Specification Remarks Inductance 1-3 607 µH 100 kHz, 1 V Inductance 1-3 15 µH 9 - 12 Shorted 5. Core & Bobbin Core: EER2828 Bobbin: EER2828 2 Ae(mm ): 82.1 © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 14 FAN7602C — Green Current Mode PWM Controller 3. Winding Specification Part Value Note Part Fuse Value Note Capacitor FUSE 1 A/250 V RT101 5D-9 R102, R112 10 MΩ 1/4 W R103 56 kΩ 1/2 W C107 R104 150 Ω 1/4 W C108 103 Ceramic R105 R106 R107 1 kΩ 0.5 Ω 56 kΩ 1/4 W 1/2 W 1/4 W C109 C110 C201, C202 22 µF / 25 V 473 1000 µF / 25 V Electrolytic Ceramic Electrolytic R108 10 kΩ 1/4 W C203 102 Ceramic NTC Resistor C101 220 nF / 275 V Box Capacitor C102 150 nF / 275 V Box Capacitor C103, C104 102 / 1 kV Ceramic C105 150 µF / 400 V Electrolytic C106 103 / 630 V Film 271 Ceramic R109 0Ω 1/4 W C204 102 Ceramic R110 1 kΩ 1/4 W C222 222 / 1 kV Ceramic R111 6 kΩ 1/4 W R113 180 kΩ 1/4 W R114 50 kΩ 1/4 W R201 1.5 kΩ 1/4 W D101, D102 UF4007 R202 1.2 kΩ 1/4 W D103 1N5819 R203 20 kΩ 1/4 W D202, D204 FYPF2010DN R204 27 kΩ 1/4 W ZD101, ZD201 1N4744 R205 7 kΩ 1/4 W BD101 KBP06 R206 10 Ω 1/2 W R207 10 kΩ MOSFET Q101 FQPF8N60C Fairchild Semiconductor Diode Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor TNR 1/4 W R101 IC 471 470 V Filter IC101 FAN7602C Fairchild Semiconductor LF101 23 mH 0.8 A IC201 KA431 Fairchild Semiconductor L201 10 µH 4.2 A OP1, OP2 H11A817B Fairchild Semiconductor © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 15 FAN7602C — Green Current Mode PWM Controller 6. Demo Circuit Part List FAN7602C — Green Current Mode PWM Controller 7. PCB Layout Minimize Leakage Inductance DC Link Minimize Loop Area Pulsating High Current 8 7 6 5 VSTR NC VCC OUT FAN7602C YWW LUVP Latch/P limit CS/FB GND 1 2 3 4 Separate Power and Signal Ground Place these caps. close to the IC Signal Level Low Current Figure 28. PCB Layout Recommendations 8. Performance Data 85 VAC 110 VAC 220 VAC 265 VAC Input Power at No Load 72 mW 76 mW 92 mW 107 mW Input Power at 0.5 W Load 760 mW 760 mW 785 mW 805 mW OLP Point 4.73 A 5.07 A 5.11 A 4.91 A © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 16 0.65 A 4.90±0.10 (0.635) 5 8 B 1.75 6.00±0.20 1 PIN ONE INDICATOR 5.60 3.90±0.10 4 1.27 1.27 0.25 C B A LAND PATTERN RECOMMENDATION SEE DETAIL A 0.175±0.75 0.22±0.30 C 1.75 MAX 0.10 0.42±0.09 OPTION A - BEVEL EDGE (0.86) x 45° R0.10 GAGE PLANE R0.10 OPTION B - NO BEVEL EDGE 0.36 NOTES: UNLESS OTHERWISE SPECIFIED 8° 0° A) THIS PACKAGE CONFORMS TO JEDEC MS-012, VARIATION AA. B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M. E) DRAWING FILENAME: M08Arev15 F) FAIRCHILD SEMICONDUCTOR. SEATING PLANE 0.65±0.25 (1.04) DETAIL A SCALE: 2:1 Figure 29. 8-Lead Small Outline Package (SOP) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 17 FAN7602C — Green Current Mode PWM Controller Physical Dimensions FAN7602C — Green Current Mode PWM Controller © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.1 www.fairchildsemi.com 18