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Reference design: wide range 200W L6599-based HB LLC resonant converter for LCD TV & flat panels

AN2393

AN2393 Application note
Reference design: wide range 200W L6599-based HB LLC resonant converter for LCD TV & flat panels
Introduction
October 2007
www.st.com
Contents
AN2393
Contents
Resonant power transformer specification . . . . . . . . . . . . . . . . . . . . . 27
7.1 Electrical characteristics and mechanical aspect . . . . . . . . . . . . . . . . . . . 28
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List of figures
Main characteristics and circuit description
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Main characteristics and circuit description
The main characteristics of the SMPS are listed below:
Universal input mains range: 90 to 264 Vac and frequencies between 45 and 65 Hz Output voltages: - - - - 24 V@6 A continuous operation 12 V@ 5 A continuous operation 3.3 V@ 0.7 A continuous operation 5 V@ 1 A continuous operation
The circuit consists of three stages. A front-end PFC pre-regulator implemented by the controller L6563 (Figure 2), a half-bridge resonant DC / DC converter based on the resonant controller L6599 (Figure 3) and a 7 W flyback converter intended for stand-by management (Figure 4) utilizing the VIPer12A-E off-line primary switcher. The PFC stage delivers a stable 400 VDC supply and provides for the reduction of the mains harmonics, in order to meet the requirements of the European norm EN61000-3-2 and the JEIDA-MITI norm for Japan. The PFC controller is the L6563 (U1), working in FOT (fixed off-time) mode and integrating all functions needed to operate the PFC and interface the downstream resonant converter. Note: The FOT control is implemented through components C15, C17, D5, Q3, R14, R17 and R29 (see AN1792 for a complete description of a FOT PFC pre-regulator). The power stage of the PFC is a conventional boost converter, connected to the output of the rectifier bridge through a differential mode filtering cell (C5, C6 and L3) for EMI reduction. It includes a coil (L4), diode (D3) and two capacitors (C7 and C8). The boost switch is represented by the Power MOSFET (Q2) which is directly driven by the L6563 output drive thanks to the high current capability of the IC. The divider (R30, R31 and R32) provides the L6563 (MULT Pin 3) with the information of the instantaneous voltage that is used to modulate the boost current and to derive some further information like the average value of the AC line used by the VFF (voltage feed-forward) function. This function is used to keep the output voltage almost independent of the mains one. The first divider (R3, R6, R8, R10 and R11) is dedicated to detecting the output voltage while the second divider (R5, R7, R9, R16 and R25) is used to protect the circuit in case of voltage loop fail. The second stage is an LLC resonant converter, with half bridge topology, working in ZVS (zero voltage switching) mode. The controller is the L6599 integrated circuit that incorporates the necessary functions to drive properly the two half-bridge MOSFETs by a 50 percent fixed duty cycle with dead-time,
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Vrect D1 1N5406 D2 D15XB60 L3 D3 STTH8R06 C7 470nF / 630V C8 220uF / 450V C9 R2 Vdc NTC 2R5-S237 +400V + DM-LSR-72uH-3A C2 100nF-X2 Jumper ~ 330nF-X2 680nF-X2 330nF / 630V 680nF / 630V C3 C4 C5 C6 PQ35-900uH L4 Jumper ~
Figure 2.
CM-TF2628V-5mH-3A
6.3A / 250V
CON2-IN
C10 2nF2-Y 2 2nF2-Y2
C11 2nF2-Y1
R4 R3 Vaux 47 680k R6 680k 100nF 10uF / 50V C12 C13
Main characteristics and circuit description
R7 680k
R9 R10 C14 100k 100nF R14 C16 1k5 R17 C17 15k INV COMP MULT CS VFF TBO R20 PWM-Latch 1k0 R26 150k C20 470nF 240k 2nF2 1k5 R28 C21 R29 C18 R21 330pF 2R2 0R68 0R68 0R68 R22 R23 R24 PFC-OK PWM-LATCH PWM-STOP RUN 1k CS ZCD GND CS GD 6R8 R19 VCC 220pF LL4148 LL4148 R18 Q2 STP12NM50FP D5 D6 U1 L6563 1uF 56k R13 100pF 15k C15 R11
PFC pre-regulator electrical diagram
Q3 BC857C
Vrect
620k R32 10k 10nF C22
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AN2393 Figure 3.
C23 Q5 LL4148 47 STP14NK50Z 16 2uH2 Q6 4 LL4148 C28 C27 VBOOT 13 C29 2200uF / 35V R38 Vaux 47 12 2uH2 C34 C31 220pF / 630V 10uF / 50V R43 9 150 D12 LL4148 C39 220nF 75R LL4148 R45 D11 C37 2200uF / 25V C38 2200uF / 25V 100nF 10 C32 11 D10B STPS20L40CF C35 470uF / 25V L6 D10A STPS20L40CF C30 2200uF / 35V HVG OUT NC VCC LVG GND PFC-STOP 47 STP14NK50Z 22nF / 630V 100nF 14 R40 0R 15 U2 L6599 D8B STPS20H100CF C25 470uF / 35V L5 R35 0R D8A STPS20H100CF
R33 +24V
R34 J2 T1 T-RES-ER49 2 D9 R39
470nF
DELAY
270pF
RFMIN
CC by rework
Resonant converter electrical diagram
PWM-Latch
C40 R51 2k2 R52 5k6 D13 C-12V C41 R53 10uF / 50V 33k
R54 U3B SFH617A-2 U3A SFH617A-2 R56 1k0 R57 15k R58 0R
R60 C44 47nF U4 TL431 R59 3k9 27k
R61 3k9
Main characteristics and circuit description
+5Vst-by L7 D15 1N5822 C45 33uH 100uF / 10V +3V3 PKC-136 L8 D16 4 8 Vs 9 - 10 1000uF / 10V 100uF / 10V D20 2 BAV103 D18 1 B-10V C-30V 10uF / 50V R62 47 C52 47nF R64 1k6 C51 100nF D19 C50 1N5821 C47 33uH C49 St-By 1000uF / 10V C46 S D14 7 S FB Vdd D D D D +5Vst-by T2 T-FLY -AUX-E20 5 6 J3 1 2 3 4 5 6 7 8 9 10 CON10
Figure 4.
Vdc +400V
U5 VIPER-12A
C48 LL4148 U6B D17 SFH617A-2
Main characteristics and circuit description
10uF / 50V
R83 Vdc +400V 1M0 R84 150k U8A SFH617A-2 R68 Vs R69 0R Q8 BC847C 10k R72 10k D21 Q9 BC857C B-27V D23 Q10 BC847C C56 R79 100nF 1k0 U8B SFH617A-2 B-15V 1k5 0R 1k5 R82 +12V R75 R76 +24V R71 St-By 22k 1k0 R66 +5Vst-by
Q11 BC557C
U6A SFH617A-2
R67 1k0
Auxiliary converter electrical diagram
C53 2nF2 R73 8k2 U7 TL431 R77 4k7 C54 100nF
Q7 BC547C
10uF / 50V
C-15V
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Electrical test results
Efficiency measurements
Table 1 and Table 2 show the output voltage measurements at the nominal mains voltages of 115 Vac and 230 Vac, with different load conditions. For all measurements, both at full load and at light load operation, the input power is measured using a Yokogawa WT-210 digital power meter. Particular attention has to be paid when measuring input power at full load in order to avoid measurement errors due to the voltage drop on cables and connections. Therefore please connect the WT210 voltmeter termination to the board input connector. For the same reason please measure the output voltage at the output connector or use the remote sense option of your active load for a correct output voltage measurement.
Table 1.
Table 2.
Electrical test results
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Overall efficiency versus output power at nominal mains voltages
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Electrical test results Overall efficiency versus output power at several input voltage values
O utput power (W )
Resonant stage operating waveforms
Figure 7 shows some waveforms during steady state operation of the resonant circuit at full load. The Ch3 waveform is the half-bridge square voltage on Pin 14 of L6599, driving the resonant circuit. In the picture it is not evident, but the switching frequency is normally slightly modulated following the PFC pre-regulator 100-Hz ripple that is rejected by the resonant control circuitry. The switching frequency has been selected approximately at 95-kHz in order to have a good trade off between transformer losses and dimensions. The Ch4 waveform represents the transformer primary current flowing into the resonant tank. As shown, it is almost sinusoidal because the operating frequency is close to the resonance of the leakage inductance of the transformer and the resonant capacitor (C28). In this condition, the circuit has a good margin for ZVS operation, providing good efficiency,
Electrical test results while the almost sinusoidal current waveform just allows for an extremely low EMI generation.
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Figure 8 shows the same waveforms of previous figure, when both the outputs are not loaded. This picture demonstrates the ability of the converter to operate down to zero load, with the output voltages still within regulation. The resonant tank current has obviously a triangular shape and represents the magnetizing current flowing into the transformer primary side. Figure 7. Resonant circuit primary side waveforms at full load
Ch3: half-bridge square voltage Ch4: resonant tank current
Figure 8.
Resonant circuit primary side waveforms at no-load condition
Ch1: +12V output voltage Ch2: +24V output voltage Ch3: half-bridge square voltage Ch4: resonant tank current
In Figure 9 and Figure 10, waveforms relevant to the secondary side are represented: the rectifiers reverse voltage is measured by CH1 (for both +24 V and +12 V outputs) and the peak to peak value is indicated on the right side of the figure. It is a bit higher than the theoretical value that would be 2(VOUT+VF): it is possible to observe a small ringing on the bottom side of the waveform, responsible for this difference.
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Electrical test results Waveform CH3 shows the current flowing into one of the two output diodes for each output voltage (respectively D8A and D10A). Also this current shape is almost a sine wave, whose average value is one half the output current. The ripple and noise on the output voltage is shown on CH2. Thanks to the advantages of the resonant converter, the high frequency noise of the output voltages is less than 50 mV, while the residual ripple at twice the mains frequency is lower than 75 mV at maximum load and any line condition, as shown in Figure 11.
Figure 9.
Resonant circuit secondary side waveforms: +24 V output
Figure 10. Resonant circuit secondary side waveforms: +12 V output
+24 V output waveforms: Ch1: +24 V diode reverse voltage Ch2: high freq. ripple on +24 V output voltage Ch3: diode D8A current
+12 V output waveforms: Ch1: +12V diode reverse voltage Ch2: high freq. ripple on +12 V output voltage Ch3: diode D10A current
Figure 11. Low frequency (100 Hz) ripple voltage on the output voltages
Ch1: 100 Hz ripple voltage on +12 V Ch2: 100 Hz ripple voltage on +24 V
Electrical test results
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Dynamic load +24 V @0-6 A - 12 V @ max load (5 A) Ch1: +24 V output voltage Ch2: +12 V output current Ch3: PFC output voltage (400 V) Ch4: + 24 V output current
Dynamic load +12 V @0-5 A - 24 V @ max load (6 A) Ch1: +24 V output voltage Ch2: +12 V output current Ch3: PFC output voltage (400 V) Ch4: + 12 V output current
Stand-by and no load power consumption
The board is specifically designed for light load and zero load operation, as during Stand-by or Power-off operation, when no power is requested from the +24 V and +12 V outputs. Though the resonant converter can operate down to zero load, some tricks are required to keep very low the input power drawn from the mains when the system is in this load condition. Thus, when entering this power management mode, the ST-BY signal needs to be set high (by the microcontroller of the system). This forces the PFC pre-regulator and the resonant stage to switch off (because the supply voltage of the two control ICs is no longer present (Figure 4) and only the auxiliary flyback converter continues working just to supply the microprocessor circuitry. Table 3 and Table 4 show the measurements of the input power in several light load conditions at 115 and 230 Vac. These tables show that at no load the input power is lower than 0.5 W.
+3.3 V(V) @load(A) 3.35 - 0.102 3.35 - 0.079 3.35 - 0.046 3.35 - 0.023 3.35 - 0.000
Electrical test results
+5 V(V) @load(A) 5.08 - 0.018 5.04 - 0.018 4.98 - 0.018 4.92 - 0.018 4.47 - 0.000
POUT (W) 0.43 0.36 0.24 0.17 0.00
PIN (W) 0.863 0.751 0.582 0.445 0.221
Table 4.
+3.3 V(V) @load(A) 3.35 - 0.102 3.35 - 0.079 3.35 - 0.046 3.35 - 0.023 3.35 - 0.000 POUT (W) 0.43 0.36 0.24 0.17 0.00 PIN (W) 1.138 1.022 0.857 0.740 0.470
+5 V(V) @load(A) 5.08 - 0.018 5.04 - 0.018 4.98 - 0.018 4.92 - 0.018 4.47 - 0.000
Short-circuit protection
Electrical test results
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side of the figure the very low mean current flowing in the shorted output which is less than 0.3 A. Figure 14. +24 V output short-circuit waveforms Figure 15. +12 V output short-circuit waveforms
Short circuit on +24 V output voltage
Ch1: +24 V output voltage Ch2: L6599 pin 6 (ISEN) Ch3: L6599 pin 2 (DELAY) Ch4: +24 V output current
Short circuit on +12 V output voltage
Ch1: +12 V output voltage Ch2: L6599 pin 6 (ISEN) Ch3: L6599 pin 2 (DELAY) Ch4: +12 V output current
Overvoltage protection
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Thermal tests
In order to check the design reliability, a thermal mapping by means of an IR Camera was performed. Figure 16 and Figure 17 show the thermal measurements of the board, component side, at nominal input voltage. The correlation between measurement points and components is indicated for both diagrams. Figure 16. Thermal map @115 Vac - full load
Figure 17. Thermal map at 230 Vac - full load
Thermal tests Table 5. Key components temperature at 115 Vac - full load
Ambient temperature: 25° C Item D2 Q2 D3 L1 L3 L4 (Fe) L4 (Cu) C8 R2 Q5 Q6 D8A D8B D10A D10B C29 C30 C37 C38 L5 L6 T1 T1 U5 D14 D15 D16 T2 Temp (°C) 44.9 53.7 50.3 47.0 46.0 45.8 49.2 37.3 78.0 40.2 46.7 56.2 56.7 42.1 42.7 45.1 46.1 42.0 41.6 71.2 56.0 51.7 56.8 81.4 74.2 57.6 55.3 56.4
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AN2393 Table 6. Key components temperature at 230 VAC - full load
Ambient temperature: 25° C Item D2 Q2 D3 L1 L3 L4 (Fe) L4 (Cu) C8 R2 Q5 Q6 D8A D8B D10A D10B C29 C30 C37 C38 L5 L6 T1 (Fe) T1 (Cu) U5 D14 D15 D16 T2 Temp (°C) 37.1 46.6 44.0 33.6 34.9 39.1 41.2 37.1 65.8 38.3 43.7 56.4 55.6 42.1 43.8 48.2 47.4 44.3 44.5 73.6 57.3 51.3 58.8 81.8 74.4 59.4 56.3 56.8
Thermal tests
All other board components work within the temperature limits, assuring a reliable long term operation of the power supply. Note that the temperatures of L4 and T1 have been measured both on the ferrite core (Fe) and on the copper (Cu).
Conducted emission pre-compliance test
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Conducted emission pre-compliance test
The limits indicated on both diagrams at 115 Vac and 230 Vac comply with EN55022 Class-B specifications. The measurements have been taken in Quasi Peak detection mode. Figure 18. CE quasi peak measurement at 115 Vac and full load
Figure 19. CE quasi peak measurement at 230 Vac and full load
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Bill of materials
Table 7.
Item C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33
Bill of materials
Part type / value 100 nF-X2 330 nF-X2 680 nF-X2 330 nF / 630 V 680 nF / 630 V 470 nF / 630 V 220 µF / 450 V 2nF2-Y1 2nF2-Y1 2nF2-Y1 100 nF 10 µF / 50 V 100 nF 100 pF 1 µF 220 pF 330 pF 10 nF 470 nF 2nF2 10 nF 2 µF2 470 nF 470 µF / 35 V 270 pF 100 nF 22 nF / 630 V / 400 Vac 2200 µF / 35 V 2200 µF / 35 V 10 µF / 50 V 100 nF 4 nF7 Description 275 Vac X2 Safety Capacitor MKP R46 275 Vac X2 Safety Capacitor MKP R46 275 Vac X2 Safety Capacitor MKP R46 Polypropylene Capacitor High Ripple MKP R71 Polypropylene Capacitor High Ripple MKP R71 Polypropylene Capacitor High Ripple MKP R71 Aluminium ELCAP USC Series 85 DEG SNAP-IN 400 Vac Y1 Safety Ceramic Disk Capacitor 250 Vac Y1 Safety Ceramic Disk Capacitor 250 Vac Y1 Safety Ceramic Disk Capacitor 50 V 1206 SMD Cercap General Purpose Aluminium ELCAP General Purpose 85 DEG 50 V 1206 SMD Cercap General Purpose 100 V 0805 SMD Cercap General Purpose 25 V 1206 SMD Cercap General Purpose 100 V 0805 SMD Cercap General Purpose 100 V 0805 SMD Cercap General Purpose 100 V 0805 SMD Cercap General Purpose 50 V 1206 SMD Cercap General Purpose 100 V 1206 SMD Cercap General Purpose 100 V 0805 SMD Cercap General Purpose 25 V 1206 SMD Cercap General Purpose 25 V 1206 SMD Cercap General Purpose Aluminium ELCAP YXF Series 105 DEG 100 V 0805 SMD Cercap General Purpose 50 V 1206 SMD Cercap General Purpose Polypropylene Capacitor High Ripple PHE450 Aluminium ELCAP YXF Series 105 DEG Aluminium ELCAP YXF Series 105 DEG Aluminium ELCAP General Purpose 85 DEG 50 V 1206 SMD Cercap General Purpose 100 V 1206 SMD Cercap General Purpose Supplier Arcotronics Arcotronics Arcotronics Arcotronics - Epcos Arcotronics - Epcos Arcotronics - Epcos Rubycon Murata Murata Murata BC Components Rubycon BC Components BC Components BC Components BC Components BC Components BC Components BC Components BC Components BC Components BC Components BC Components Rubycon BC Components BC Components RIFA-EVOX Rubycon Rubycon Rubycon BC Components BC Components
Bill of materials Table 7.
Item C34 C35 C37 C38 C39 C40 C41 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 D1 D2 D3 D5 D6 D7 D8A-B D9 D10A-B D11 D12 D13 D14
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Bill of materials (continued)
Part type / value 220 pF / 630 V 470 µF / 25 V 2200 µF / 25 V 2200 µF / 25 V 220 nF 10 nF 10 µF / 50 V 47 nF 1000 µF / 10 V 100 µF / 10 V 1000 µF / 10 V 10 µF / 50 V 100 µF / 10 V 10 µF / 50 V 100 nF 47 nF 2 nF2 100 nF 10 µF / 50 V 100 nF 1nF0 10 nF 1N5406 D15XB60 STTH8R06 LL4148 LL4148 LL4148 STPS20H100CF LL4148 STPS20L40CF LL4148 LL4148 C-12 V PKC-136 Description Polypropylene Capacitor High Ripple PFR Aluminium ELCAP YXF Series 105 DEG Aluminium ELCAP YXF Series 105 DEG Aluminium ELCAP YXF Series 105 DEG 50 V 1206 SMD Cercap General Purpose 100 V 1206 SMD Cercap General Purpose Aluminium ELCAP General Purpose 85 DEG 100 V 1206 SMD Cercap General Purpose Aluminium ELCAP YXF Series 105 DEG Aluminium ELCAP YXF Series 105 DEG Aluminium ELCAP YXF Series 105 DEG Aluminium ELCAP General Purpose 85 DEG Aluminium ELCAP YXF Series 105 DEG Aluminium ELCAP General Purpose 85 DEG 100 V 0805 SMD Cercap General Purpose 100 V 0805 SMD Cercap General Purpose 100 V 0805 SMD Cercap General Purpose 50 V 1206 SMD Cercap General Purpose Aluminium ELCAP General Purpose 85 DEG 50 V 1206 SMD Cercap General Purpose 100 V 0805 SMD Cercap General Purpose 50 V X7R Standard Ceramic Capacitor General Purpose Rectifier Single Phase Bridge Rectifier TO220FP Ultrafast High Voltage Rectifier MINIMELF Fast Switching Diode MINIMELF Fast Switching Diode MINIMELF Fast Switching Diode TO220FP Power Schottky Rectifier MINIMELF Fast Switching Diode TO220FP Power Schottky Rectifier MINIMELF Fast Switching Diode MINIMELF Fast Switching Diode BZV55-C Series Zener Diode Peak Clamp Transil Supplier RIFA-EVOX Rubycon Rubycon Rubycon BC Components BC Components Rubycon BC Components Rubycon Rubycon Rubycon Rubycon Rubycon Rubycon BC Components BC Components BC Components BC Components Rubycon BC Components BC Components BC Components Vishay Shindengen STMicroelectronics Vishay Vishay Vishay STMicroelectronics Vishay STMicroelectronics Vishay Vishay Vishay STMicroelectronics
AN2393 Table 7.
Item D15 D16 D17 D18 D19 D20 D21 D22 D23 F1 J1 J2 J3 L1 L3 L4 L5 L6 L7 L8 Q2 Q3 Q5 Q6 Q7 Q8 Q9 Q10 Q11 R1 R2 R3 R4 R5 R6
Bill of materials Bill of materials (continued)
Bill of materials Table 7.
Item R7 R8 R9 R10 R11 R13 R14 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R45
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Bill of materials (continued)
AN2393 Table 7.
Item R46 R47 R51 R52 R53 R54 R56 R57 R58 R59 R60 R61 R62 R64 R66 R67 R68 R69 R70 R71 R72 R73 R74 R75 R76 R77 R79 R82 R83 R84 T1 T2 U1 U2 U3
Bill of materials Bill of materials (continued)
PFC coil specification Table 7.
Item U4 U5 U6 U7 U8
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Bill of materials (continued)
Note:
Q9 and R72: Mounted by reworking on PCB Q11, R83, R84 and C58: Added by reworking on PCB
PFC coil specification
Application type: Consumer, home appliance Transformer type: Open Coil former: vertical type, 6+6 pins Maximum temperature rise: 45° C Maximum operating ambient temperature: 60° C
Electrical characteristics
Note:
Measured between Pins 2 and 3 and Pins 10 and 11 Figure 20. PFC coil electrical diagram
4-5 Primary 1-2 12 Auxiliary 8
Note:
The auxiliary winding is not used in this design, but is foreseen for another application
AN2393 Table 8.
Start pins 12 4 and 5
Resonant power transformer specification PFC coil winding characteristics
End pins 8 1 and 2 Turn number 5 (spaced) 70 Wire type Single Multistrand - G2 Wire diameter (mm) 0.28 Litz 0.2 x 20 Notes Bottom Top
Mechanical aspect and pin numbering
Maximum height from PCB: 38 mm Cut pins: 7, 10 and 11 Pin distance: 5.08 mm Row distance: 35.5 mm
Figure 21. PFC coil pin side view
Note:
External copper shield 15 x 0.05 (mm) connected to pin 12 by tinned wire Manufacturer: DELTA ELECTRONICS - Part number: 86H-5409
Resonant power transformer specification
Application type: Consumer, home appliance Transformer type: Open Coil former: Horizontal type, 7+7 pins, 2 Slots Maximum temperature rise: 45° C Maximum operating ambient temperature: 60° C Mains insulation: Compliance with EN60065 specifications
Resonant power transformer specification
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Electrical characteristics and mechanical aspect
Note:
Measured between Pins 1 and 3 Measured between Pins 1 and 3 with ONLY a secondary winding shorted Figure 22. Mechanical aspect and pin numbering of resonant transformer
Table 9.
Resonant transformer dimensions
Dimensions (mm)
39.0 MAX
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Resonant power transformer specification Figure 23. Resonant transformer electrical diagram
14 SEC. A 13 SEC. B 1 PRIM. 3 11 SEC. C 10 9 SEC. D 8 12
Table 10.
Pins 1-3 14 - 13 13 - 12 11 - 10 9-8
Resonant transformer winding characteristics
Winding Primary Sec. A Sec. B Sec. C
RMS current 1.5 ARMS 6.7 ARMS 6.7 ARMS 5.6 ARMS 5.6 ARMS
Turn number 36 4 4 2 2
Wire type mm LITZ - dia. 0.15x20 LITZ - dia. 0.20x30 LITZ - dia. 0.20x30 LITZ - dia. 0.20x30 LITZ - dia. 0.20x30
Sec. D (2)
1. Secondary windings A and B must be wound in parallel 2. Aux winding is wound on top of primary winding
Figure 24. Resonant transformer winding position on coil former
Note:
Manufacturer: DELTA ELECTRONICS - Part number: 86H-5411
Auxiliary flyback power transformer
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Auxiliary flyback power transformer
Application type: Consumer, home appliance Transformer type: Open Winding type: Layer Coil former: Horizontal type, 4+5 pins Maximum temperature rise: 45° C Maximum operating ambient temperature: 60° C Mains insulation: Complies with EN60065 specifications
Electrical characteristics
Note:
Measured between Pins 4 and 5 Measured between Pins 4 and 5 with all secondary windings shorted Figure 25. Auxiliary transformer electrical diagram
5 Primary 4 2 Auxliary 1 6 +5V 7 8 +3.3V 10
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Auxiliary flyback power transformer Figure 26. Auxiliary transformer winding position on coil former Insulating Coil Former 3.3 V / 5 V Auxiliary Primary
Table 11.
Pins Start - End 4-5 2-1 8-10 6-7
Auxiliary transformer winding characteristics
Winding PRIMARY AUX 3.3 V 5V RMS current 0.2 ARMS 0.05 ARMS 1.2 ARMS 1 ARMS Number of turns 140 29 7 3 Wire type G2 - 0.25 mm G2 - 0.25 mm TIW - 0.75 mm TIW - 0.75 mm
Note:
Manufacturer: DELTA ELECTRONICS - Part number: 86A-6079-R
Reference design board layout
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Reference design board layout
Figure 27. Copper tracks
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Reference design board layout Figure 28. Thru-hole component placing and top silk screen
Figure 29. SMT component placing and bottom silk screen
Revision history
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Revision history
Table 12.
Date 02-Aug-2006 08-Sep-2006 25-Jan-2007 23-Apr-2007 25-Oct-2007
Document revision history
Revision 1 2 3 4 5 Initial release Figure 2. modified Minor text change - Cross references updated - Table 7: Bill of materials modified - Modified: Section 8.1: Electrical characteristics - VIPer12A replaced by VIPer12A-E Changes
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