FSDM0465RE, FSDM0565RE, FSDM07652RE Green Mode Fairchild Power Switch (FPS™) Features Description Internal Avalanche-Rugged SenseFET The FSDM0465RE, FSDM0565RE and FSDM07652RE are 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 power-switching regulator that combines an avalanche-rugged SenseFET with a current mode PWM control block. The PWM controller includes an integrated fixed-frequency oscillator, undervoltage 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. Advanced Burst-Mode Operation Consumes Under 1W at 240VAC & 0.5W load Precision Fixed Operating Frequency (66kHz) Internal Start-up Circuit Improved Pulse-by-Pulse Current Limiting Over-Voltage Protection (OVP) Overload Protection (OLP) Internal Thermal Shutdown Function (TSD) Auto-Restart Mode Under-Voltage Lockout (UVLO) with hysteresis Low Operating Current (2.5mA) Built-in Soft-Start Applications SMPS for LCD monitor and STB Adaptor Ordering Information Product Number Package Marking Code BVDSS RDS(ON) Max. FSDM0465REWDTU(1) TO-220F-6L (Forming) DM0465RE 650V 2.6 Ω FSDM0565REWDTU TO-220F-6L (Forming) DM0565RE 650V 2.2 Ω FSDM07652REWDTU TO-220F-6L (Forming) DM07652RE 650V 1.6 Ω Note: 1. WDTU: Forming Type. All packages are lead free per JEDEC: J-STD-020B standard. FPSTM is a trademark of Fairchild Semiconductor Corporation. © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) October 2007 AC IN DC OUT Vstr Drain PWM VCC FB Source FSDM0565RE Rev: 00 Figure 1. Typical Flyback Application Output Power Table Product 230VAC ±15%(4) Adapter(2) Open 85–265VAC Frame(3) Adapter(2) Open Frame(3) FSDM0465RE 48W 56W 40W 48W FSDM0565RE 60W 70W 50W 60W FSDM07652RE 70W 80W 60W 70W Notes: 2. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient. 3. Maximum practical continuous power in an open-frame design at 50°C ambient. 4. 230VAC or 100/115VAC with doubler. © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 2 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Typical Circuit VCC Vstr 3 6 NC 5 Drain 1 Istart 0.5/0.7V + Vref 8V/12V VCC Idelay VCC good Internal Bias Vref OSC IFB 2.5R PWM S Q R Q FB 4 Gate driver R Soft-start LEB VSD 2 GND VCC S Q R Q Vovp TSD VCC good VCL FSDM0565RE Rev: 00 Figure 2. Functional Block Diagram of FSDM0x65RE © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 3 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Internal Block Diagram TO-220F-6L 6. Vstr 5. NC 4. FB 3. VCC 2. GND 1. Drain Figure 3. Pin Configuration (Top View) Pin Definitions Pin # Name 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. VCC Power Supply. This pin is the positive supply voltage input. During start-up, the power is supplied by an internal high-voltage current source connected to the Vstr pin. When VCC reaches 12V, the internal high-voltage current source is disabled and the power is supplied from the auxiliary transformer winding. 4 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 NC No Connection. Vstr Start-up. This pin is connected directly to the high-voltage DC link. At start-up, the internal high-voltage current source supplies internal bias and charges the external capacitor connected to the VCC pin. Once VCC reaches 12V, the internal current source is disabled. 3 6 © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 4 FSDM0465RE, FSDM0565RE, FSDM07652RE — 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 Value Unit Drain Source Breakdown Voltage 650 V Vstr Max. Voltage at Vstart pin 650 V IDM Drain Current Pulsed(5) BVDSS Parameter FSDM0465RE TC=25°C 9.6 FSDM0565RE TC=25°C 11 FSDM07652RE TC=25°C 15 TC=25°C 2.2 FSDM0465RE ID Continuous Drain Current FSDM0565RE FSDM07652RE TC=100°C 1.4 TC=25°C 2.8 TC=100°C 1.7 TC=25°C 3.8 TC=100°C 2.4 ADC A FSDM0465RE EAS Single Pulsed Avalanche Energy(6) FSDM0565RE 190 FSDM07652RE 370 mJ VCC Supply Voltage 20 V VFB Input Voltage Range -0.3 to VCC V PD(Watt H/S) Total Power Dissipation (TC=25°C) 45 W Internally limited °C 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 Vstr and FB) 2.0 (GND-Vstr/VFB=1.5kV) kV ESD Capability, Machine Model (All pins except Vstr and FB) 300 (GND-Vstr/VFB=225V) V Value Unit Junction-to-Ambient Thermal Resistance 49.90 °C/W Junction-to-Case Thermal Resistance 2.78 °C/W TSTG Notes: 5. Repetitive rating: Pulse width limited by maximum junction temperature. 6. L=14mH, starting TJ=25°C. Thermal Impedance TA=25°C, unless otherwise specified. Symbol θJA(7) θJC(8) Parameter Notes: 7. Free-standing, with no heat-sink, under natural convection. 8. Infinite cooling condition - refer to the SEMI G30-88. © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 5 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Absolute Maximum Ratings TA = 25°C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit SenseFET SECTION FSDM0465RE IDSS Zero Gate Voltage Drain Current FSDM0565RE FSDM07652RE VDS = 650V, VGS = 0V 250 VDS = 520V, VGS = 0V, TC = 125°C 250 VDS = 650V, VGS = 0V 500 VDS = 520V, VGS = 0V, TC = 125°C 500 VDS = 650V, VGS = 0V 500 VDS = 520V, VGS = 0V, TC = 125°C 500 2.20 2.60 1.76 2.20 FSDM07652RE 1.40 1.60 FSDM0465RE 60 FSDM0465RE RDS(ON) COSS Static Drain Source on Resistance(9) Output Capacitance FSDM0565RE FSDM0565RE VGS = 10V, ID = 2.5A VGS = 0V, VDS = 25V, f = 1MHz 78 FSDM07652RE tr td(off) tf Turn-On Delay Time Rise Time Turn-Off Delay Time Fall Time FSDM0565RE 22 22 FSDM0465RE 20 VDD = 325V, ID = 5A 60 FSDM0465RE 65 VDD = 325V, ID = 5A ns 95 FSDM07652RE 115 FSDM0465RE 27 FSDM0565RE ns 52 FSDM07652RE FSDM0565RE pF 23 VDD = 325V, ID = 5A FSDM07652RE FSDM0565RE Ω 100 FSDM0465RE td(on) µA VDD = 325V, ID = 5A ns 50 FSDM07652RE ns 65 CONTROL SECTION fOSC ΔfSTABLE ΔfOSC IFB DMAX Switching Frequency Switching Frequency Stability Switching Frequency Variation (10) Feedback Source Current VFB = 3V 60 66 72 kHz 13V ≤ VCC ≤ 18V 0 1 3 % -25°C ≤ TA ≤ 85°C 0 ±5 ±10 % 0.7 0.9 1.1 mA FSDM0465RE VFB = GND 77 82 87 % Maximum Duty Cycle FSDM0565RE 77 82 87 % 75 80 85 % 0 % VFB = GND 11 12 13 V VFB = GND 7 8 9 V 10 15 ms FSDM07652RE DMIN VSTART VSTOP tS/S Minimum Duty Cycle UVLO Threshold Voltage Internal Soft-Start Time © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 VFB = 3 www.fairchildsemi.com 6 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Electrical Characteristics TA = 25°C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit BURST MODE SECTION VBURH VBURL Burst Mode Voltages VCC = 14V 0.7 V VCC = 14V 0.5 V PROTECTION SECTION VSD IDELAY tLEB Shutdown Feedback Voltage VFB ≥ 5.5V 5.5 Shutdown Delay Current VFB = 5V 2.8 Leading-Edge Blanking Time (11) ILIMIT Peak Current Limit VOVP Over-Voltage Protection TSD Thermal Shutdown 6.0 6.5 V 3.5 4.2 µA 250 ns FSDM0465RE VFB = 5V, VCC = 14V 1.60 1.80 2.00 FSDM0565RE VFB = 5V, VCC = 14V 2.00 2.25 2.50 FSDM07652RE VFB = 5V, VCC = 14V 2.20 2.50 2.70 18 19 20 V 130 145 160 °C 2.5 5.0 mA Temperature(10) A TOTAL DEVICE SECTION VFB = GND, VCC = 14V IOP IOP(MIN) Operating Supply Current(12) IOP(MAX) VFB = GND, VCC = 10V VFB = GND, VCC = 18V Notes: 9. Pulse test: Pulse width ≤ 300µS, duty cycle ≤ 2%. 10. These parameters, although guaranteed at the design, are not tested in production. 11. These parameters indicate the inductor current. 12. This parameter is the current flowing into the control IC. © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 7 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Electrical Characteristics (Continued) Function FS6M0765RTC FSDM0x65RE FSDM0x65RE Advantages Gradually increasing current limit during Soft-Start soft-start reduces peak current and voltAdjustable soft-start Internal soft-start with age component stresses time using an external typically 10ms (fixed) Eliminates external soft-start components capacitor in most applications Reduces or eliminates output overshoot Built into controller Built into controller Improves light-load efficiency Burst-Mode Operation Output voltage Output voltage fixed Reduces no-load consumption drops to around half © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 8 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Comparison Between FS6M0765RTC and FSDM0x65RE These characteristic graphs are normalized at TA= 25°C. 1.2 1.2 Start Thershold Voltage (Vstart) Operating Current (I op) 1.0 0.8 0.6 0.4 0.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 -25 0 25 50 75 100 125 -25 150 0 Figure 4. Operating Current vs. Temp. 75 100 125 150 Figure 5. Start Threshold Voltage vs. Temp. 1.2 1.2 1.0 1.0 Operating Frequency (f osc) Stop Threshold Voltage (Vstop) 50 Junction Temperature [°C] Junction Temperature [°C] 0.8 0.6 0.4 0.2 0.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 -25 0 Junction Temperature [°C] 25 50 75 100 125 150 Junction Temperature [°C] Figure 6. Stop Threshold Voltage vs. Temp. Figure 7. Operating Frequency vs. Temp. 1.2 1.2 1.0 1.0 FB Source Current (I FB) Maximum Duty Cycle (D MAX) 25 0.8 0.6 0.4 0.2 0.8 0.6 0.4 0.2 0.0 0.0 -25 0 25 50 75 100 125 150 -25 Junction Temperature [°C] 25 50 75 100 125 150 Junction Temperature [°C] Figure 8. Maximum Duty Cycle vs. Temp. © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 0 Figure 9. Feedback Source Current vs. Temp. www.fairchildsemi.com 9 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics These characteristic graphs are normalized at TA= 25°C. 1.2 1.0 Shutdown Delay Current (I DELAY) Shutdown FB Voltage (VSD) 1.2 0.8 0.6 0.4 0.2 0.0 1.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 -25 0 25 Junction Temperature [°C] Figure 10. Shutdown Feedback Voltage vs. Temp. FB Burst-Mode Enable Voltage (VFBE) Over-Voltage Protection (Vovp) 75 100 125 150 Figure 11. Shutdown Delay Current vs. Temp. 1.2 1.0 0.8 0.6 0.4 0.2 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 -25 0 25 50 75 100 125 -25 150 0 25 50 75 100 125 150 Junction Temperature [°C] Junction Temperature [°C] Figure 12. Over-Voltage Protection vs. Temp. Figure 13. Burst-Mode Enable Voltage vs. Temp. 1.2 1.2 1.0 1.0 Peak Current Limit (Self protection) (I over) FB Burst-Mode Disable Voltage (VFBD) 50 Junction Temperature [°C] 0.8 0.6 0.4 0.2 0.8 0.6 0.4 0.2 0.0 0.0 -25 0 25 50 75 100 125 150 -50 Junction Temperature [°C] 0 25 50 75 100 125 Junction Temperature [°C] Figure 14. Burst-Mode Disable Voltage vs. Temp. © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 -25 Figure 15. Current Limit vs. Temp. www.fairchildsemi.com 10 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics (Continued) FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics (Continued) These characteristic graphs are normalized at TA= 25°C. 1.2 Soft-Start Time (Normalized to 25°C) 1.0 0.8 0.6 0.4 0.2 0.0 -50 -25 0 25 50 75 100 125 Junction Temperature [°C] Figure 16. Soft-Start Time vs. Temp. . © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 11 2.1 Pulse-by-Pulse Current Limit: Because currentmode control is employed, the peak current through the SenseFET is limited by the inverting input of PWM comparator (VFB*) as shown in Figure 18. Assuming that the 0.9mA current source flows only through the internal resistor (2.5R + R = 2.8kΩ), the cathode voltage of diode D2 is about 2.5V. Since D1 is blocked when the feedback voltage (VFB) exceeds 2.5V, the maximum voltage of the cathode of D2 is clamped at this voltage, thus clamping VFB*. Therefore, the peak value of the current through the SenseFET is limited. 1. Start-up: In previous generations of Fairchild Power Switches (FPS™), the VCC pin had an external start-up resistor to the DC input voltage line. In this generation, the start-up resistor is replaced by an internal highvoltage current source. At start-up, the internal highvoltage current source supplies the internal bias and charges the external capacitor (Cvcc) connected to the VCC pin, as illustrated in Figure 17. When VCC reaches 12V, the FSDM0x65RE begins switching and the internal high-voltage current source is disabled. The FSDM0x65RE continues normal switching operation and the power is supplied from the auxiliary transformer winding unless VCC goes below the stop voltage of 8V. 2.2 Leading Edge Blanking (LEB): At the instant the internal SenseFET is turned on, a high-current spike occurs through the SenseFET, caused by primary-side capacitance and secondary-side rectifier reverse recovery. Excessive voltage across the Rsense resistor would lead to incorrect feedback operation in the current mode PWM control. To counter this effect, the FSDM0x65RE employs a leading-edge blanking (LEB) circuit. This circuit inhibits the PWM comparator for a short time (tLEB) after the SenseFET is turned on. VDC CVcc Vref VCC Idelay VCC 3 6 Vstr VFB VO 4 H11A817A D2 2.5R Istart + Vfb* Vref SenseFET OSC D1 CB 8V/12V IFB KA431 Gate driver R - VCC good Internal Bias VSD OLP Rsense FSDM0565RE Rev: 00 FSDM0565RE Rev: 00 Figure 18. Pulse-Width-Modulation (PWM) Circuit Figure 17. Internal Start-up Circuit 3. Protection Circuit: The FSDM0x65RE 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 a fault condition occurs, switching is terminated and the SenseFET remains off, which causes VCC to fall. When VCC reaches the UVLO stop voltage of 8V, the protection is reset and the internal high-voltage current source charges the VCC capacitor via the Vstr pin. When VCC reaches the UVLO start voltage of 12V, the FSDM0x65RE 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 19). 2. Feedback Control: FSDM0x65RE employs currentmode control, as shown in Figure 18. An opto-coupler (such as the H11A817A) and 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, plus an offset voltage, makes it possible to control the switching duty cycle. When the reference pin voltage of the shunt regulator exceeds the internal reference voltage of 2.5V, the optocoupler LED current increases, pulling down the feedback voltage and reducing the duty cycle. This event typically occurs when the input voltage is increased or the output load is decreased. © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 12 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Functional Description Power on Fault occurs FSDM0565RE Rev: 00 VFB Fault removed Overload protection 6.0V 2.5V VCC T12= CFB*(6.0-2.5)/Idelay 12V T1 8V Normal operation Fault situation Normal operation 3.2 Over-Voltage Protection (OVP): If the secondary side feedback circuit were to malfunction or a solder defect caused an opening in the feedback path, the current through the opto-coupler transistor becomes almost zero. In this event, VFB climbs 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 overvoltage protection (OVP) circuit is employed. In general, VCC is proportional to the output voltage and the FSDM0x65RE 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 below 19V. Figure 19. Auto Restart Operation 3.1 Overload Protection (OLP): Overload is defined as the load current exceeding a pre-set level due to an unexpected event. In this situation, the protection circuit should be activated to protect the SMPS. Even when the SMPS is in normal operation, the overload protection circuit can be activated during the load 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 a true overload situation. Because of the pulse-by-pulse current limit capability, the maximum peak current through the SenseFET is limited, and therefore 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, thus increasing the feedback voltage (VFB). If VFB exceeds 2.5V, D1 is blocked and the 3.5µA current source 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 20. The delay time for shutdown is the time required to charge CB from 2.5V to 6.0V with 3.5µA. A 10 ~ 50ms delay time is typical for most applications. © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 t Figure 20. Overload Protection t FSDM0565RE Rev: 00 T2 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 ~150°C, the thermal shutdown is activated. 4. Soft-Start: The FSDM0x65RE has an internal softstart circuit that increases PWM comparator inverting input voltage, together with the SenseFET current, slowly after it starts up. The typical soft-start time is 10ms. The pulse width to the power switching device is progressively increased to establish the correct working conditions for transformers, inductors, and capacitors. The voltage on the output capacitors is progressively increased with the intention of smoothly establishing the required output voltage. It also helps prevent transformer saturation and reduces the stress on the secondary diode during start-up. www.fairchildsemi.com 13 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) VDS FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) 5. Burst Operation: To minimize power dissipation in standby mode, the FSDM0x65RE enters burst-mode operation. As the load decreases, the feedback voltage decreases. As shown in Figure 21, the device automatically enters burst mode when the feedback voltage drops below VBURL(500mV). 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 (700mV), 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 0.7V 0.5V IDS VDS time Switching disabled FSDM0565RE Rev: 00 T1 T2 T3 Switching disabled T4 Figure 21. Waveforms of Burst Operation © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 14 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 zero load power consumption (<300mW at 240VAC input) Low standby mode power consumption (<800mW at 240VAC input and 0.3W load) Low component count Enhanced system reliability through various protection functions Internal soft-start (10ms) Key Design Notes Resistors R102 and R105 are employed to prevent start-up at low input voltage. After start-up, there is no power loss in these resistors since the start-up pin is internally disconnected after start-up. The delay time for overload protection is designed to be about 50ms with C106 of 47nF. If a faster triggering of OLP is required, C106 can be reduced to 10nF. Zener diode ZD102 is used for a safety test, such as UL. When the drain pin and feedback pin are shorted, the zener diode fails and remains short, which causes the fuse (F1) to be blown and prevents explosion of the opto-coupler (IC301). This zener diode also increases the immunity against line surge. 1. Schematic D202 T1 EER3016 MBRF10100 C103 100μF 400V R105 40kΩ BD101 2 2KBP06M3N257 1 5 4 C102 220nF 275VAC 4 ZD102 10V 2 D101 UF 4007 C202 1000μF 25V C201 1000μF 25V 8 3 IC1 FSDM0565RE 6 3 C104 2.2nF 1kV R103 56kΩ 2W 12V, 2.5A 10 1 R102 30kΩ L201 Vstr Drain 1 D201 MBRF1045 NC VCC 3 FB C106 47nF 50V GND 2 ZD101 22V C105 D102 22μF UF4004 50V R104 5Ω 4 L202 5V, 2A 7 C204 1000μF 10V C203 1000μF 10V 6 5 C301 4.7nF LF101 23mH R201 1kΩ R101 560kΩ 1W RT1 5D-9 C101 220nF 275VAC R202 1.2kΩ IC301 H11A817A F1 FUSE 250V 2A IC201 KA431 R204 5.6kΩ R203 12kΩ C205 47nF R205 5.6kΩ FSDM0565RE Rev: 00 Figure 22. Demo Circuit © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 15 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Application Information EER3016 Np/2 Np/2 1 10 2 9 3 8 4 7 Na 5 N12V N5V 6 FSDM0565RE Rev: 00 Figure 23. 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 FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 16 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) 2. Transformer Part Value Note F101 2A/250V Fuse NTC RT101 5D-9 Part Note D102 UF4004 D201 MBRF1045 D202 MBRF10100 ZD101 Zener Diode 22V ZD102 Zener Diode 10V Resistor R101 Value Bridge Diode 560kΩ 1W R102 30kΩ 1/4W R103 56kΩ 2W R104 5Ω 1/4W R105 40kΩ 1/4W R201 1kΩ 1/4W R202 1.2kΩ R203 BD101 2KBP06M 3N257 Bridge Diode Line Filter LF101 23mH Wire 0.4mm 1/4W IC101 FSDM0565RE FPS™ (5A,650V) 12kΩ 1/4W IC201 KA431 (TL431) Voltage reference R204 5.6kΩ 1/4W IC301 H11A817A Opto-coupler R205 5.6kΩ 1/4W IC Capacitor Box Capacitor C101 220nF/275VAC C102 220nF/275VAC Box Capacitor C103 100µF/400V Electrolytic Capacitor C104 2.2nF/1kV Ceramic Capacitor C105 22µF/50V Electrolytic Capacitor C106 47nF/50V Ceramic Capacitor 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 C301 4.7nF Polyester Film Cap. L201 5µH Wire 1.2mm L202 5µH Wire 1.2mm D101 UF4007 Inductor Diode © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 17 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) 6. Demo Circuit Part List FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) 7. Layout Figure 24. Layout Considerations for FSDM0565RE (Top View) Figure 25. Layout Considerations for FSDM0565RE (Bottom View) © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 18 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) Package Dimensions Figure 26. TO-220F-6L (Forming) © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 19 FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Fairchild Power Switch (FPS™) © 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 20