FSCM0465R Green Mode Fairchild Power Switch (FPS™) Features Description Internal Avalanche Rugged SenseFET The FSCM0465R is an integrated Pulse-Width Modulator (PWM) and SenseFET specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components. This device is an integrated high-voltage powerswitching regulator that combines an avalanche rugged SenseFET with a current mode PWM control block. The PWM controller includes an integrated fixed-frequency oscillator, under-voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current sources for a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, it can reduce total cost, component count, size, and weight while simultaneously increasing efficiency, productivity, and system reliability. This device is a basic platform well suited for cost-effective designs of flyback converters. Low Start-up Current (max. 40µA) Low Power Consumption; under 1W at 240VAC and 0.4W Load Precise Fixed Operating Frequency (66kHz) Frequency Modulation for Low EMI Pulse-by-Pulse Current Limiting (Adjustable) Over-Voltage Protection (OVP) Overload Protection (OLP) Thermal Shutdown Function (TSD) Auto-Restart Mode Under-Voltage Lock Out (UVLO) with Hysteresis Built-in Soft-Start (15ms) Applications SMPS for VCR, SVR, STB, DVD, and DVCD Adaptor SMPS for LCD Monitor Related Application Notes AN-4137: Design Guidelines for Off-line Flyback Converters Using Fairchild Power Switch (FPS) AN-4140: Transformer Design Consideration for Off-line Flyback Converters using Fairchild Power Switch AN-4141: Troubleshooting and Design Tips for Fairchild Power Switch Flyback Applications AN-4148: Audible Noise Reduction Techniques for FPS Applications Ordering Information Product Number Package Pb-Free Marking Code BVDSS RDS(ON) Max. Packing Method FSCM0465RJ D2-PAK-6L Yes Tube FSCM0465RJX D2-PAK-6L Yes Tape & Reel FSCM0465RIWDTU(1) I2-PAK-6L Yes TO-220-6L Yes (1) FSCM0465RGWDTU CM0465R 650V 2.6 Ω Tube Tube Note: 1. WDTU: Forming Type FPSTM is a trademark of Fairchild Semiconductor Corporation. © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 1 FSCM0465R Green Mode Fairchild Power Switch (FPS™) June 2006 DC OUT AC IN Drain PWM Ilimit Vfb Vcc GND FSCM0465R Rev. 00 Figure 1. Typical Flyback Application Output Power Table Product 230VAC ±15%(3) Adapter (1) Open Frame 85–265VAC (2) Adapter (1) Open Frame(2) FSCM0465RJ 40W 55W 30W 40W FSCM0565RJ 50W 65W 40W 50W FSCM0765RJ 65W 70W 50W 60W FSCM0465RI 60W 70W 40W 50W FSCM0465RG 60W 70W 40W 50W FSCM0565RG 70W 85W 60W 70W FSCM0765RG 85W 95W 70W 85W Notes: 1. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient 2. Maximum practical continuous power in an open-frame design at 50°C ambient 3. 230 VAC or 100/115 VAC with doubler © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 2 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Typical Circuit N.C. VCC 5 3 Drain 1 VCC Good 0.3/0.5V + Internal Bias Freq. Modulation VCC Vref 8V/12V VCC OSC IDELAY IFB PWM S Q R Q 2.5R FB 4 Gate Driver R 6 I_limit Soft start LEB 0.3K VSD VCC 2 GND S Q R Q Vovp TSD Vcc Good VCC UV Reset FSCM0465R Rev. 00 Figure 2. Functional Block Diagram of FSCM0465R © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 3 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Internal Block Diagram FSCM0465RJ FSCM0465RI D2-PAK-6L I2-PAK-6L 6 : I_limit 5 : N.C. 4 : FB 3 : VCC 2 : GND FSCM0465RI FSCM0465RJ 6 : I_limit 5 : N.C. 4 : FB 3 : VCC 2 : GND 1 : Drain 1 : Drain FSCM0465RG TO-220-6L FSCM0465RG 6. I_limit 5. N.C. 4. FB 3. VCC 2. GND 1. Drain Figure 3. Pin Configuration (Top View) Pin Definitions Pin Number Pin Name Pin Function Description 1 Drain SenseFET Drain. This pin is the high-voltage power SenseFET drain. It is designed to drive the transformer directly. 2 GND Ground. This pin is the control ground and the SenseFET source. 3 VCC Power Supply. This pin is the positive supply voltage input. During startup, the power is supplied through the startup resistor from DC link. When VCC reaches 12V, the power is supplied from the auxiliary transformer winding. 4 Feedback (FB) Feedback. 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. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 6.0V, the overload protection is activated, resulting in shutdown of the FPS. 5 N.C. 6 I_limit This pin is not connected. Current Limit. This pin is for the pulse-by-pulse current limit level programming. By using a resistor to GND on this pin, the current limit level can be changed. If this pin is left floating, the typical current limit is 2.0A. © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 4 FSCM0465R Green Mode 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. TA = 25°C unless otherwise specified. Symbol Parameter (1) BVDSS Drain-Source Breakdown Voltage VDGR Value Unit 650 V Drain-Gate Voltage (RGS=1MΩ) 650 V VGS Gate-Source (GND) Voltage ±30 V IDM Drain Current Pulsed(2) 16 ADC TC = 25°C 4.0 ADC TC = 100°C 2.5 ADC TC = 25°C 2.3 ADC TC = 100°C 1.4 ADC 20 V Continuous Drain Current (TO-220-6L, I2-PAK-6L) ID Continuous Drain Current (D2-PAK-6L) VCC Supply Voltage VFB Feedback Voltage Range PD Derating PD Derating PD Derating -0.3 to VCC V 140 W -1.1 W/°C 75 W -1.5 W/°C 80 W -0.64 W/°C Internally limited °C Total Power Dissipation (TO-220-6L) Total Power Dissipation (I2-PAK-6L) Total Power Dissipation (D2-PAK-6L) TJ Operating Junction Temperature TA Operating Ambient Temperature -25 to +85 °C Storage Temperature -55 to +150 °C ESD Capability, HBM Model (All pins except Vfb) 2.0 (GND-Vfb = 1.5kV) (VCC-Vfb = 1.0kV) kV ESD Capability, Machine Model (All pins except Vfb) 300 (GND-Vfb = 250V) (VCC-Vfb = 100V) V TSTG Notes: 1. Tj = 25°C to 150°C 2. Repetitive rating: Pulse-width limited by maximum junction temperature 3. TC: Case back surface temperature with infinite heat sink © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 5 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Absolute Maximum Ratings TA = 25°C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit SenseFET SECTION IDSS Zero Gate Voltage Current VDS = Max, Rating VGS = 0V - - 250 µA Static Drain Source on Resistance(1) VGS = 10V, ID = 2.3A - 2.2 2.6 Ω COSS Output Capacitance VGS = 0V, VDS = 25V, f = 1MHz - 60 - pF td(on) Turn-on Delay Time - 23 - - 20 - - 65 - - 27 - RDS(ON) tr td(off) tf Rise Time VDD = 325V, ID = 3.2A(4) Turn-off Delay Time Fall Time ns CONTROL SECTION 60 66 72 kHz ΔfMOD fOSC Switching Frequency Modulation Range - ±3 - kHz tMOD Switching Frequency Modulation Cycle - 4 - ms 0 1 3 % fSTABLE Switching Frequency VCC = 14V, VFB = 5V Switching Frequency Stability 10V ≤ VCC ≤ 17V −25°C ≤ TA ≤ +85°C ΔfOSC Switching Frequency - ±5 ±10 % DMAX Maximum Duty Cycle 75 80 85 % DMIN Minimum Duty Cycle - - 0 % 11 12 13 V VSTART Variation(2) UVLO Threshold Voltage VFB = GND IFB Feedback Source Current VFB = GND tS/S Internal Soft-Start Time VSTOP 7 8 9 V 0.7 0.9 1.1 mA 10 15 20 ms BURST MODE SECTION VBURH VBURL Burst Mode Voltages VCC = 14V 0.4 0.5 0.6 V VCC = 14V 0.24 0.3 0.36 V VCC = 14V, VFB = 5V 2.2 2.5 2.8 A PROTECTION SECTION ILIMIT Peak Current Limit(3) VOVP Over-Voltage Protection 18 19 20 V Thermal Shutdown Temperature(2) 130 145 160 °C TSD IDELAY VSD Shutdown Delay Current VFB = 4V 3.5 5.3 7 µA Shutdown Feedback Voltage VFB ≥ 5.5V 5.5 6 6.5 V - 20 40 µA - 2.5 5 mA TOTAL DEVICE SECTION Istart IOP(MIN) IOP(MAX) Startup Current Operating Supply Current VCC = 10V, VFB = 0V VCC = 20V, VFB = 0V Notes: 1. Pulse Test: Pulse width ≤ 300µS, duty ≤ 2% 2. These parameters, although guaranteed at the design, are not tested in mass production. 3. These parameters indicate the inductor current. Where packages are I2PAK or D2PAK, this should be decreased to 2.0A by external resistor. 4. MOSFET switching time is essentially independent of operating temperature. © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 6 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Electrical Characteristics Function FSDM0465RB FSCM0465R Frequency Modulation N/A Available - Frequency modulation range (ΔfMOD) = ±3kHz - Frequency modulation cycle (tMOD) = 4ms Pulse-by-pulse Current Limit Internally fixed (2.0A max.) Programmable using external resistor (2.8A max.) Internal Startup Circuit Available N/A (Requires a startup resistor) Startup current: 40µA (max.) Packages TO-220F-6L TO-220-6L I2-PAK-6L D2-PAK-6L © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 7 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Comparison Between FSDM0465RB and FSCM0465R These characteristic graphs are normalized at TA= 25°C. 1.60 Stop Threshold Voltage (Normalized to 25°C) 1.20 Start up Current (Normalized to 25°C) 1.40 1.20 1.00 0.80 0.60 1.12 1.04 0.96 0.88 0.80 -50 -25 0 25 50 75 100 125 -50 -25 Junction Temperature [°C] 50 75 100 125 Figure 5. Stop Threshold voltage vs. Temp. 1.20 Start Threshold Voltage (Normalized to 25°C) 1.20 1.12 Maximum Duty Cycle (Normalized to 25°C) 25 Junction Temperature [°C] Figure 4. Startup Current vs. Temp. 1.04 0.96 0.88 0.80 1.12 1.04 0.96 0.88 0.80 -50 -25 0 25 50 75 100 125 -50 -25 Junction Temperature [°C] 0 25 50 75 100 125 Junction Temperature [°C] Figure 6. Maximum Duty Cycle vs. Temp. Figure 7. Start Threshold Voltage vs. Temp. 1.20 1.20 1.12 1.12 FB Source Current (Normalized to 25°C) Initial Frequency (Normalized to 25°C) 0 1.04 0.96 0.88 0.80 1.04 0.96 0.88 0.80 -50 -25 0 25 50 75 100 -50 125 0 25 50 75 100 125 Junction Temperature [°C] Junction Temperature [°C] Figure 8. Initial Frequency vs. Temp. Figure 9. Feedback Source Current vs. Temp. © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 -25 www.fairchildsemi.com 8 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics These characteristic graphs are normalized at TA= 25°C. 1.20 Burst Mode Enable Voltage (Normalized to 25°C) Shutdown FB Voltage (Normalized to 25°C) 1.20 1.12 1.04 0.96 0.88 1.12 1.04 0.96 0.88 0.80 0.80 -50 -25 0 25 50 75 100 -50 125 -25 Figure 10. Shutdown Feedback voltage vs. Temp. 50 75 100 125 1.20 Shutdown Delay Current (Normalized to 25°C) Maximum Drain Current (Normalized to 25°C) 25 Figure 11. Burst Mode Enable Voltage vs. Temp. 1.20 1.12 1.04 0.96 0.88 1.12 1.04 0.96 0.88 0.80 0.80 -50 -25 0 25 50 75 100 -50 125 -25 0 25 50 75 100 125 Junction Temperature [°C] Junction Temperature [°C] Figure 12. Maximum Drain Current vs. Temp. Figure 13. Shutdown Delay Current vs. Temp. 1.20 1.20 Operating Supply Current (Normalized to 25°C) Burst Mode Disable Voltage (Normalized to 25°C) 0 Junction Temperature [°C] Junction Temperature [°C] 1.12 1.04 0.96 0.88 0.80 1.12 1.04 0.96 0.88 0.80 -50 -25 0 25 50 75 100 125 -50 Junction Temperature [°C] 0 25 50 75 100 125 Junction Temperature [°C] Figure 14. Burst Mode Disable Voltage vs. Temp. Figure 15. Operating Supply Current vs. Temp. © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 -25 www.fairchildsemi.com 9 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics (Continued) The minimum current supplied through the startup resistor is given by: 1. Startup: Figure 16 shows the typical startup circuit and transformer auxiliary winding for the FSCM0465R application. Before the FSCM0465R begins switching, it consumes only startup current (typically 20µA) and the current supplied from the DC link supply current consumed by the FPS (ICC) and charges the external capacitor (Ca) connected to the VCC pin. When VCC reaches start voltage of 12V (VSTART), the FSCM0465R begins switching and the current consumed by the FSCM0465R increases to 2.5mA. Then the FSCM0465R continues its normal switching operation and the power required for this device is supplied from the transformer auxiliary winding, unless VCC drops below the stop voltage of 8V (VSTOP). To guarantee the stable operation of the control IC, VCC has under-voltage lockout (UVLO) with 4V hysteresis. Figure 17 shows the relationship between the current consumed by the FPS (ICC) and the supply voltage (VCC). Isup min = FSCM0465R 1 Rstr (1) startup resistor should be chosen so that Isupmin is larger than the maximum startup current (40µA). If not, VCC can not be charged to the start voltage and FPS fails to start. 2. Feedback Control: The FSCM0465R employs current mode control, as shown in Figure 18. An optocoupler (such as the H11A817A) and a shunt regulator (such as the KA431) are typically used to implement the feedback network. Comparing the feedback voltage with the voltage across the Rsense resistor makes it possible to control the switching duty cycle. When the reference pin voltage of the KA431 exceeds the internal reference voltage of 2.5V, the H11A817A LED current increases, pulling down the feedback voltage and reducing the duty cycle. This event typically happens when the input voltage is increased or the output load is decreased. 2.1 Pulse-by-pulse Current Limit: Because current mode control is employed, the peak current through the SenseFET is determined by the inverting input of the PWM comparator (Vfb*) as shown in Figure 18. When the current through the opto-transistor is zero and the current limit pin (#5) is left floating, the feedback current source (IFB) of 0.9mA flows only through the internal resistor (R+2.5R=2.8k). In this case, the cathode voltage of diode D2 and the peak drain current have maximum values of 2.5V and 2.5A, respectively. The pulse-bypulse current limit can be adjusted using a resistor to GND on the current limit pin (#5). The current limit level using an external resistor (RLIM) is given by: AC line (Vlinemin - Vlinemax) Rstr Da VCC ) 2 ⋅ Vline min − Vstar t ⋅ where Vlinemin is the minimum input voltage, Vstart is the start voltage (12V) and Rstr is the startup resistor. The CDC ISUP ( ICC Ca FSCM0465R Rev. 00 Figure 16. Startup Circuit ILIM = RLIM ⋅ 2.5 A 2.8K Ω + RLIM (2) ICC Vcc Vref Idelay IFB 0.9mA Vfb Vo 3mA 4 H11A817A SenseFET OSC D1 CB D2 2.5R 0.3k + Vfb* Power Up Power Down KA431 25μA FSCM0465R Rev. 00 VCC Vstop=8V Vstart=12V - RLI M Vz VSD OLP Rsense FSCM0465R Rev. 00 Figure 17. Relation Between Operating Supply Current and VCC Voltage Figure 18. Pulse Width Modulation (PWM) Circuit © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 6 Gate driver R www.fairchildsemi.com 10 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Functional Description Ilim_spec × Vdc × Ry ≅ Na Np 3. Protection Circuit: The FSCM0465R has several self-protective functions, such as overload protection (OLP), over-voltage protection (OVP) and thermal shutdown (TSD). Because these protection circuits are fully integrated into the IC without external components, the reliability is improved without increasing cost. Once the fault condition occurs, switching is terminated and the SenseFET remains off. This causes VCC to fall. When VCC reaches the UVLO stop voltage of 8V, the current consumed by the FSCM0465R decreases to the startup current (typically 20µA) and the current supplied from the DC link charges the external capacitor (Ca) connected to the VCC pin. When VCC reaches the start voltage of 12V, the FSCM0465R resumes normal operation. In this manner, the auto-restart can alternately enable and disable the switching of the power SenseFET until the fault condition is eliminated (see Figure 20). (3) Ifb × ΔIlim_comp where, Ilim_spec is the limit current stated on the specification; Na and Np are the number of turns for VCC and primary side, respectively; Ifb is the internal current source at feedback pin with a typical value of 0.9mA; and ΔIlim_comp is the current difference which must be eliminated. In case of capacitor in the circuit 1µF, 100V is good choice for all applications. Vds VDC Power On Fault occurs Fault removed Np Vcc L 12V 8V Vfb Drain t Na Vcc FSCM0465R Rev. 00 I_lim RLIM GND FSCM0465R Rev. 00 CY + Vy = VDC × Na Np Normal Operation 3.1 Overload Protection (OLP): Overload is defined as the load current exceeding a preset level due to an unexpected event. In this situation, the protection circuit should be activated to protect the SMPS. However, even when the SMPS is in the normal operation, the overload protection circuit can be activated during the load Figure 19. Constant power limit circuit © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 Fault Situation Figure 20. Auto Restart Operation compensation network RY Normal Operation www.fairchildsemi.com 11 FSCM0465R Green Mode Fairchild Power Switch (FPS™) 2.3 Leading Edge Blanking (LEB): At the instant the internal SenseFET is turned on, a high-current spike through the SenseFET usually occurs, caused by primary-side capacitance and secondary-side rectifier reverse recovery. Excessive voltage across the Rsense resistor can lead to incorrect feedback operation in the current mode PWM control. To counter this effect, the FSCM0465R employs a leading edge blanking (LEB) circuit. This circuit inhibits the PWM comparator for a short time after the SenseFET is turned on. 2.2 Constant Power Limit Circuit: Due to the circuit delay of FPS, the pulse-by-pulse limit current increases a little bit when the input voltage increases. This means unwanted excessive power is delivered to the secondary side. To compensate, the auxiliary power compensation network in Figure 19 can be used. RLIM can adjust pulseby-pulse current by absorbing internal current source (IFB: typical value is 0.9mA), depending on the ratio between resistors. With the suggested compensation circuit, additional current from IFB is absorbed more proportionally to the input voltage (VDC) and achieves constant power in wide input range. Choose RLIM for proper current to the application, then check the pulseby-pulse current difference between minimum and maximum input voltage. To eliminate the difference (to gain constant power), Ry can be calculated by: 4. Frequency Modulation: EMI reduction can be accomplished by modulating the switching frequency of a switched power supply. Frequency modulation 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 depth of the reference frequency. As can be seen in Figure 22, the frequency changes from 63KHz to 69KHz in 4ms. Drain Current FSCM0465R Rev. 00 VFB Overload Protection Ts 6.0V Ts 2.5V Ts T12= CB*(6.0-2.5)/Idelay T1 fs T2 t 69kHz 66kHz 63kHz Figure 21. Overload Protection 3.2 Over-Voltage Protection (OVP): If the secondaryside feedback circuit were to malfunction or a solder defect causes an opening in the feedback path, the current through the opto-coupler transistor becomes almost zero. In this case, Vfb climbs up in a similar manner to the overload situation, forcing the preset maximum current to be supplied to the SMPS until the overload protection is activated. Because more energy than required is provided to the output, the output voltage may exceed the rated voltage before the overload 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. In general, VCC is proportional to the output voltage and the FSCM0465R uses VCC instead of directly monitoring the output voltage. If VCC exceeds 19V, an OVP circuit is activated, resulting in the termination of the switching operation. To avoid undesired activation of OVP during normal operation, VCC should be designed to be below 19V. FSCM0465R Rev. 00 t Figure 22. Frequency Modulation 5. Soft-Start: The FSCM0465R has an internal soft-start circuit that increases PWM comparator inverting input voltage, together with the SenseFET current, slowly after it starts up. The typical soft-start time is15ms. The pulse width to the power switching device is progressively increased to establish the correct working conditions for transformers, rectifier diodes, and capacitors. The voltage on the output capacitors is progressively increased with the intention of smoothly establishing the required output voltage. Preventing transformer saturation and reducing stress on the secondary diode during startup is also helpful. © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 4ms www.fairchildsemi.com 12 FSCM0465R Green Mode Fairchild Power Switch (FPS™) 3.3 Thermal Shutdown (TSD): The SenseFET and the control IC are built in one package. This makes it easy for the control IC to detect the heat generation from the SenseFET. When the temperature exceeds approximately 145°C, the thermal protection is triggered, resulting in shutdown of the FPS. transition. To avoid this undesired operation, the overload protection circuit is designed to be activated after a specified time to determine whether it is a transient situation or an overload situation. Because of the pulse-by-pulse current limit capability, the maximum peak current through the SenseFET 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 (VO) decreases below the set voltage. This reduces the current through the optocoupler LED, which also reduces the opto-coupler transistor current, increasing the feedback voltage (Vfb). If Vfb exceeds 2.5V, D1 is blocked and the 5.3µA current source (Idelay) starts to charge CB slowly up to VCC. In this condition, Vfb continues increasing until it reaches 6V, when the switching operation is terminated as shown in Figure 21. The delay time for shutdown is the time required to charge CB from 2.5V to 6.0V with 5.3µA (Idelay). A 10 ~ 50ms delay time is typical for most applications. FSCM0465R Green Mode Fairchild Power Switch (FPS™) 6. Burst Operation: To minimize power dissipation in standby mode, the FSCM0465R enters into burst-mode operation at light load condition. As the load decreases, the feedback voltage decreases. As shown in Figure 23, the device automatically enters burst mode when the feedback voltage drops below VBURL (300mV). At this point, switching stops and the output voltages start to drop at a rate dependent on standby current load. This causes the feedback voltage to rise. Once it passes VBURH (500mV), switching resumes. The feedback voltage then falls and the process repeats. Burst mode operation alternately enables and disables switching of the power SenseFET, thereby reducing switching loss in standby mode. Vo Voset VFB 0.5V 0.3V Ids Vds time Switching disabled FSCM0465R Rev. 00 T1 T2 T3 Switching disabled T4 Figure 23. Waveforms of Burst Operation © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 13 Application Output Power Input Voltage Output Voltage (Max. Current) LCD Monitor 40W Universal Input (85-265Vac) 5V (2.0A) 12V (2.5A) Features High efficiency (>81% at 85Vac input) Low standby mode power consumption (<1W at 240Vac input and 0.4W load) Low component count Enhanced system reliability through various protection functions Low EMI through frequency modulation Internal soft-start (15ms) Key Design Notes Resistors R107 and R108 are employed to prevent startup at low input voltage The delay time for overload protection is designed to be about 50ms with C106 of 100nF. If a faster triggering of OLP is required, C106 can be reduced to 22nF. 1. Schematic T101 EER3016 C103 100μF 400V BD101 2KBP06M 2 1 C104 3.3nF 630V 8 L101 Ferrite Bead 3 IC101 FSCM0465R 6 Ilimit 3 Drain 1 D102 UF4004 4 4 C106 100nF 50V C102 220nF 275VAC FB D201 MBRF1060 VCC 3 GND 2 C105 22μF 50V R104 20Ω 4 L202 5V / 2.8A 7 C203 1000μF 10V C204 1000μF 10V 6 5 LF101 23mH 12V / 3.0A C202 1000μF 25V C201 1000μF 25V 2 D101 UF 4007 L201 10 1 R103 56kΩ 2W D202 MBRF10H100 C301 4.7nF R107 330kΩ R108 330kΩ R201 1kΩ R101 560kΩ 0.5W RT101 5D-9 C101 220nF 275VAC R202 1.2kΩ IC301 H11A817A F101 FUSE 250V 2A IC201 KA431 R204 5.6kΩ R203 10kΩ C205 47nF R205 5.6kΩ FSCM0465R Rev. 01 Figure 24. Demo Circuit © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 14 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Typical Application Circuit EER3016 Np/2 1 10 N 12V 2 9 3 8 4 7 Na 5 6 Np/2 N5V Figure 25. Transformer Schematic Diagram 3. Winding Specification No Pin (s→f) 4→5 Na Wire 0.2φ ×1 Turns Winding Method 8 Center Winding 18 Solenoid Winding 7 Center Winding 3 Center Winding 18 Solenoid Winding Insulation: Polyester Tape t = 0.050mm, 2 Layers 2→1 Np/2 0.4φ × 1 Insulation: Polyester Tape t = 0.050mm, 2 Layers 10 → 8 N12V 0.3φ × 3 Insulation: Polyester Tape t = 0.050mm, 2 Layers 7→6 N5V 0.3φ × 3 Insulation: Polyester Tape t = 0.050mm, 2 Layers 3→2 Np/2 0.4φ × 1 Outer Insulation: Polyester Tape t = 0.050mm, 2 Layers 4. Electrical Characteristics Pin Specification Remarks Inductance 1-3 520µH ± 10% 100kHz, 1V Leakage Inductance 1-3 10µH Max 2nd all Short 5. Core & Bobbin Core: EER 3016 Bobbin: EER3016 Ae(mm2): 96 © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 15 FSCM0465R Green Mode Fairchild Power Switch (FPS™) 2. Transformer Part Value Note Fuse F101 Part Value Note C301 4.7nF Polyester Film Cap. 2A/250V NTC RT101 Inductor 5D-9 L201 5µH Wire 1.2mm L202 5µH Wire 1.2mm Resistor R101 560kΩ 0.5W R103 56kΩ 2W R104 20Ω 1/4W R107 330kΩ 1/4W R108 330kΩ 1/4W D102 UF4004 R201 1kΩ 1/4W D201 MBRF1060 R202 1.2kΩ 1/4W D202 MBRF10H100 R203 10kΩ 1/4W R204 5.6kΩ 1/4W R205 5.6kΩ 1/4W Diode D101 UF4007 Bridge Diode BD101 2KBP06M 3N257 LF101 23mH Bridge Diode Capacitor Line Filter C101 220nF/275VAC Box Capacitor C102 220nF/275VAC Box Capacitor C103 100µF/400V Electrolytic Capacitor C104 3.3nF/630V Ceramic Capacitor IC101 FSCM0465R FPS™ (2.5A, 650V) C105 22µF/50V Electrolytic Capacitor IC201 KA431(TL431) Voltage Reference C106 100nF/50V Ceramic Capacitor IC301 H11A817A Opto-coupler C201 1000µF/25V Electrolytic Capacitor C202 1000µF/25V Electrolytic Capacitor C203 1000µF/10V Electrolytic Capacitor C204 1000µF/10V Electrolytic Capacitor C205 47nF/50V Ceramic Capacitor IC © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 Wire 0.4mm www.fairchildsemi.com 16 FSCM0465R Green Mode Fairchild Power Switch (FPS™) 6. Demo Circuit Part List FSCM0465R Green Mode Fairchild Power Switch (FPS™) Package Dimensions D2-PAK-6L Dimensions are in millimeters unless otherwise specified. A 1.40 1.00 10.10 9.70 MIN 9.50 9.40 9.00 MIN 9.00 (0.75) 5.10 4.70 MAX1.10 10.00 MAX0.80 MIN 4.00 0.70 0.50 2.19 MIN 0.85 1.75 2.19 1.27 1.27 3.81 1.75 10.20 9.80 B 4.70 4.30 (8.58) (4.40) 1.40 1.25 R0.45 (1.75) (0.90) (7.20) 15.60 15.00 NOTES: UNLESS OTHERWISE SPECIFIED A) THIS PACKAGE DOES NOT COMPLY TO ANY CURRENT PACKAGING STANDARD. B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH, AND TIE BAR EXTRUSIONS. D) DIMENSIONS AND TOLERANCES PER ASME Y14.5M-1994 MKT-TO263A6 © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 17 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Package Dimensions (Continued) I2-PAK-6L (Forming) Dimensions are in millimeters unless otherwise specified. MKT-TO262A6 © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 18 FSCM0465R Green Mode Fairchild Power Switch (FPS™) Package Dimensions (Continued) TO-220-6L (Forming) Dimensions are in millimeters unless otherwise specified. © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 19 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™ CROSSVOLT™ GTO™ HiSeC™ DOME™ I2C™ EcoSPARK™ 2 i-Lo™ E CMOS™ 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. 2. 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. 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 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 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 © 2006 Fairchild Semiconductor Corporation FSCM0465R Rev. 1.0.1 www.fairchildsemi.com 20 FSCM0465R Green Mode Fairchild Power Switch (FPS™) TRADEMARKS