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| FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) October 2007 FSDM0465RE, FSDM0565RE, FSDM07652RE Green Mode Fairchild Power Switch (FPSTM) Features Internal Avalanche-Rugged SenseFET 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 Description 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. Applications SMPS for LCD monitor and STB Adaptor Ordering Information Product Number FSDM0465REWDTU(1) FSDM0565REWDTU FSDM07652REWDTU Note: 1. WDTU: Forming Type. Package TO-220F-6L (Forming) TO-220F-6L (Forming) TO-220F-6L (Forming) Marking Code DM0465RE DM0565RE DM07652RE BVDSS 650V 650V 650V RDS(ON) Max. 2.6 2.2 1.6 All packages are lead free per JEDEC: J-STD-020B standard. FPSTM is a trademark of Fairchild Semiconductor Corporation. (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Typical Circuit AC IN DC OUT Vstr PWM FB Drain VCC Source FSDM0565RE Rev: 00 Figure 1. Typical Flyback Application Output Power Table Product FSDM0465RE FSDM0565RE FSDM07652RE 230VAC 15%(4) Adapter(2) 48W 60W 70W 85-265VAC Frame(3) Adapter(2) 40W 50W 60W Open Open Frame(3) 48W 60W 70W 56W 70W 80W Notes: 2. Typical continuous power in a non-ventilated enclosed adapter measured at 50C ambient. 3. Maximum practical continuous power in an open-frame design at 50C ambient. 4. 230VAC or 100/115VAC with doubler. (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 2 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Internal Block Diagram VCC 3 NC 5 0.5/0.7V + VCC Idelay FB 4 R Q Vstr 6 Istart Vref Internal Bias Drain 1 8V/12V VCC good Vref OSC IFB 2.5R PWM S Q Soft-start R LEB Gate driver VSD VCC S Q Q 2 GND Vovp TSD VCC good R VCL FSDM0565RE Rev: 00 Figure 2. Functional Block Diagram of FSDM0x65RE (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 3 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Pin Configuration TO-220F-6L 6. Vstr 5. NC 4. FB 3. VCC 2. GND 1. Drain Figure 3. Pin Configuration (Top View) Pin Definitions Pin # 1 2 Name Drain GND Description SenseFET drain. This pin is the high-voltage power SenseFET drain. It is designed to drive the transformer directly. Ground. This pin is the control ground and the SenseFET source. 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. 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 FPSTM. No Connection. 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 VCC 4 FB 5 NC 6 Vstr (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 4 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Absolute Maximum Ratings 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 = 25C, unless otherwise specified. Symbol BVDSS Vstr IDM Parameter Drain Source Breakdown Voltage Max. Voltage at Vstart pin FSDM0465RE Drain Current Pulsed(5) FSDM0565RE FSDM07652RE FSDM0465RE TC=25C TC=25C TC=25C TC=25C TC=100C TC=25C TC=100C TC=25C TC=100C FSDM0465RE FSDM0565RE FSDM07652RE Value 650 650 9.6 11 15 2.2 1.4 2.8 1.7 3.8 2.4 190 370 20 -0.3 to VCC 45 Internally limited -25 to +85 -55 to +150 2.0 (GND-Vstr/VFB=1.5kV) 300 (GND-Vstr/VFB=225V) Unit V V ADC ID Continuous Drain Current FSDM0565RE FSDM07652RE A EAS VCC VFB TJ TA TSTG Single Pulsed Avalanche Energy(6) Supply Voltage Input Voltage Range Operating Junction Temperature Operating Ambient Temperature Storage Temperature ESD Capability, HBM Model (All pins except Vstr and FB) ESD Capability, Machine Model (All pins except Vstr and FB) mJ V V W C C C kV V PD(Watt H/S) Total Power Dissipation (TC=25C) Notes: 5. Repetitive rating: Pulse width limited by maximum junction temperature. 6. L=14mH, starting TJ=25C. Thermal Impedance TA=25C, unless otherwise specified. Symbol JA(7) JC(8) Parameter Junction-to-Ambient Thermal Resistance Junction-to-Case Thermal Resistance Value 49.90 2.78 Unit C/W C/W Notes: 7. Free-standing, with no heat-sink, under natural convection. 8. Infinite cooling condition - refer to the SEMI G30-88. (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 5 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Electrical Characteristics TA = 25C unless otherwise specified. Symbol SenseFET SECTION Parameter Condition VDS = 650V, VGS = 0V VDS = 520V, VGS = 0V, TC = 125C VDS = 650V, VGS = 0V VDS = 520V, VGS = 0V, TC = 125C VDS = 650V, VGS = 0V VDS = 520V, VGS = 0V, TC = 125C Min. Typ. Max. Unit 250 250 500 500 500 500 2.20 2.60 2.20 1.60 pF 1.76 1.40 60 A FSDM0465RE IDSS Zero Gate Voltage Drain Current FSDM0565RE FSDM07652RE FSDM0465RE RDS(ON) Static Drain Source on Resistance(9) FSDM0565RE FSDM07652RE FSDM0465RE COSS Output Capacitance FSDM0565RE FSDM07652RE FSDM0465RE td(on) Turn-On Delay Time FSDM0565RE FSDM07652RE FSDM0465RE tr Rise Time FSDM0565RE FSDM07652RE FSDM0465RE td(off) Turn-Off Delay Time FSDM0565RE FSDM07652RE FSDM0465RE tf Fall Time FSDM0565RE FSDM07652RE CONTROL SECTION fOSC fSTABLE fOSC IFB DMAX DMIN VSTART VSTOP tS/S Switching Frequency Switching Frequency Stability Switching Frequency Variation Feedback Source Current FSDM0465RE Maximum Duty Cycle FSDM0565RE FSDM07652RE Minimum Duty Cycle UVLO Threshold Voltage Internal Soft-Start Time (10) VGS = 10V, ID = 2.5A VGS = 0V, VDS = 25V, f = 1MHz 78 100 23 VDD = 325V, ID = 5A 22 22 20 ns VDD = 325V, ID = 5A 52 60 65 ns VDD = 325V, ID = 5A 95 115 27 ns VDD = 325V, ID = 5A 50 65 ns VFB = 3V 13V VCC 18V -25C TA 85C VFB = GND 60 0 0 0.7 77 77 75 66 1 5 0.9 82 82 80 12 8 10 72 3 10 1.1 87 87 85 0 13 9 15 kHz % % mA % % % % V V ms VFB = GND VFB = GND VFB = 3 11 7 (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 6 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Electrical Characteristics (Continued) TA = 25C unless otherwise specified. Symbol BURST MODE SECTION VBURH VBURL VSD IDELAY tLEB ILIMIT VOVP TSD IOP IOP(MIN) IOP(MAX) Parameter Condition VCC = 14V VCC = 14V VFB 5.5V VFB = 5V Min. Typ. Max. Unit 0.7 0.5 5.5 2.8 1.60 2.00 2.20 18 130 6.0 3.5 250 1.80 2.25 2.50 19 145 6.5 4.2 2.00 2.50 2.70 20 160 V C A V V V A ns Burst Mode Voltages PROTECTION SECTION Shutdown Feedback Voltage Shutdown Delay Current Leading-Edge Blanking Time FSDM0465RE Peak Current Limit (11) VFB = 5V, VCC = 14V VFB = 5V, VCC = 14V FSDM0565RE FSDM07652RE VFB = 5V, VCC = 14V Over-Voltage Protection Thermal Shutdown Temperature(10) VFB = GND, VCC = 14V Operating Supply Current(12) VFB = GND, VCC = 10V VFB = GND, VCC = 18V TOTAL DEVICE SECTION 2.5 5.0 mA Notes: 9. Pulse test: Pulse width 300S, 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. (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 7 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Comparison Between FS6M0765RTC and FSDM0x65RE Function FS6M0765RTC FSDM0x65RE FSDM0x65RE Advantages Gradually increasing current limit during soft-start reduces peak current and voltage component stresses Eliminates external soft-start components in most applications Reduces or eliminates output overshoot Improves light-load efficiency Reduces no-load consumption Soft-Start Adjustable soft-start Internal soft-start with time using an external typically 10ms (fixed) capacitor Burst-Mode Operation Built into controller Output voltage drops to around half Built into controller Output voltage fixed (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 8 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Typical Performance Characteristics These characteristic graphs are normalized at TA= 25C. 1.2 Start Thershold Voltage (Vstart) 1.0 Operating Current (I op) 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Junction Temperature [C] Junction Temperature [C] Figure 4. Operating Current vs. Temp. Figure 5. Start Threshold Voltage vs. Temp. 1.2 Stop Threshold Voltage (Vstop) Operating Frequency (f osc) -25 0 25 50 75 100 125 150 1.0 0.8 0.6 0.4 0.2 0.0 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Junction Temperature [C] Junction Temperature [C] Figure 6. Stop Threshold Voltage vs. Temp. Figure 7. Operating Frequency vs. Temp. 1.2 Maximum Duty Cycle (D MAX) 1.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 FB Source Current (I FB) 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Junction Temperature [C] Junction Temperature [C] Figure 8. Maximum Duty Cycle vs. Temp. Figure 9. Feedback Source Current vs. Temp. (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 9 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Typical Performance Characteristics (Continued) These characteristic graphs are normalized at TA= 25C. 1.2 Shutdown Delay Current (I DELAY) -25 0 25 50 75 100 125 150 Shutdown FB Voltage (VSD) 1.0 0.8 0.6 0.4 0.2 0.0 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 Junction Temperature [C] Junction Temperature [C] Figure 10. Shutdown Feedback Voltage vs. Temp. Figure 11. Shutdown Delay Current vs. Temp. FB Burst-Mode Enable Voltage (VFBE) 1.2 Over-Voltage Protection (Vovp) 1.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 50 75 100 125 150 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -25 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. FB Burst-Mode Disable Voltage (VFBD) 1.2 1.0 Peak Current Limit (Self protection) (I over) -25 0 25 50 75 100 125 150 0.8 0.6 0.4 0.2 0.0 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -50 -25 0 25 50 75 100 125 Junction Temperature [C] Junction Temperature [C] Figure 14. Burst-Mode Disable Voltage vs. Temp. Figure 15. Current Limit vs. Temp. (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 10 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Typical Performance Characteristics (Continued) These characteristic graphs are normalized at TA= 25C. 1.2 1.0 Soft-Start Time (Normalized to 25C) 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. . (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 11 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Functional Description 1. Start-up: In previous generations of Fairchild Power Switches (FPSTM), 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. 2.1 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 = 2.8k), 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. 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 VCC Idelay Vref IFB OSC VCC 3 Istart Vref 8V/12V VCC good Internal Bias 6 Vstr VO H11A817A VFB CB 4 D1 D2 2.5R + Vfb* SenseFET R Gate driver KA431 - VSD FSDM0565RE Rev: 00 OLP Rsense 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. (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 12 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) VDS Power on Fault occurs Fault removed VFB FSDM0565RE Rev: 00 Overload protection 6.0V 2.5V VCC T12= CFB*(6.0-2.5)/Idelay 12V 8V T1 T2 t t Normal operation Fault situation Normal operation Figure 20. Overload Protection FSDM0565RE Rev: 00 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 3.5A 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 3.5A. A 10 ~ 50ms delay time is typical for most applications. 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. 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 ~150C, 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. (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 13 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) 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 (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 14 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Application Information Application LCD Monitor Output Power 40W Input Voltage Universal input (85-265VAC) Output Voltage (Max. Current) 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 1 C104 2.2nF 1kV 10 C201 1000F 25V 8 L201 12V, 2.5A C202 1000F 25V C103 100F 400V BD101 2 2KBP06M3N257 1 3 R102 30k R103 56k 2W 2 D101 UF 4007 3 R105 40k IC1 FSDM0565RE 6 5 4 Vstr NC VCC 3 FB GND 2 ZD101 22V C105 D102 22F UF4004 50V R104 5 4 Drain 1 D201 MBRF1045 7 C203 1000F 10V 5 6 L202 5V, 2A C204 1000F 10V 4 C102 220nF 275VAC ZD102 10V C106 47nF 50V LF101 23mH C301 4.7nF R201 1k R101 560k 1W R204 5.6k R203 12k C205 47nF R202 1.2k IC301 H11A817A RT1 5D-9 C101 220nF 275VAC F1 FUSE 250V 2A IC201 KA431 R205 5.6k FSDM0565RE Rev: 00 Figure 22. Demo Circuit (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 15 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) 2. Transformer EER3016 Np/2 1 10 N12V Np/2 2 9 3 8 4 7 N5V Na 5 6 FSDM0565RE Rev: 00 Figure 23. Transformer Schematic Diagram 3. Winding Specification No Na Np/2 N12V N5V Np/2 Pin (sf) 45 21 10 8 76 32 Wire 0.2 x1 Turns 8 18 7 3 18 Winding Method Center Winding Solenoid Winding Center Winding Center Winding Solenoid Winding Insulation: Polyester Tape t = 0.050mm, 2 Layers 0.4 x 1 0.3 x 3 0.3 x 3 0.4 x 1 Insulation: Polyester Tape t = 0.050mm, 2 Layers Insulation: Polyester Tape t = 0.050mm, 2 Layers Insulation: Polyester Tape t = 0.050mm, 2 Layers Outer Insulation: Polyester Tape t = 0.050mm, 2 Layers 4. Electrical Characteristics Pin Inductance Leakage Inductance 1-3 1-3 Specification 520H 10% 10H Max Remarks 100kHz, 1V 2nd all short 5. Core & Bobbin Core: EER 3016 Bobbin: EER3016 Ae(mm2): 96 (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 16 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) 6. Demo Circuit Part List Part F101 Value Fuse 2A/250V NTC Note Part D102 D201 D202 ZD101 ZD102 Value UF4004 MBRF1045 MBRF10100 Zener Diode Zener Diode Bridge Diode Note 22V 10V RT101 5D-9 Resistor R101 R102 R103 R104 R105 R201 R202 R203 R204 R205 560k 30k 56k 5 40k 1k 1.2k 12k 5.6k 5.6k Capacitor 1W 1/4W 2W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W BD101 2KBP06M 3N257 Line Filter Bridge Diode LF101 23mH IC Wire 0.4mm IC101 IC201 IC301 FSDM0565RE KA431 (TL431) H11A817A FPSTM (5A,650V) Voltage reference Opto-coupler C101 C102 C103 C104 C105 C106 C201 C202 C203 C204 C205 C301 220nF/275VAC 220nF/275VAC 100F/400V 2.2nF/1kV 22F/50V 47nF/50V 1000F/25V 1000F/25V 1000F/10V 1000F/10V 47nF/50V 4.7nF Inductor Box Capacitor Box Capacitor Electrolytic Capacitor Ceramic Capacitor Electrolytic Capacitor Ceramic Capacitor Electrolytic Capacitor Electrolytic Capacitor Electrolytic Capacitor Electrolytic Capacitor Ceramic Capacitor Polyester Film Cap. L201 L202 5H 5H Diode Wire 1.2mm Wire 1.2mm D101 UF4007 (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 17 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) 7. Layout Figure 24. Layout Considerations for FSDM0565RE (Top View) Figure 25. Layout Considerations for FSDM0565RE (Bottom View) (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 18 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) Package Dimensions Figure 26. TO-220F-6L (Forming) (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 19 FSDM0465RE, FSDM0565RE, FSDM07652RE -- Green Mode Fairchild Power Switch (FPSTM) (c) 2006 Fairchild Semiconductor Corporation FSDM0465RE, FSDM0565RE, FSDM07652RE Rev. 1.0.2 www.fairchildsemi.com 20 |
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