EVL6566A-75WADP

EVL6566A-75WADP 19 V - 75 W laptop adapter with tracking boost PFC pre-regulator, using the L6563 and the L6566A Data Brief Features ■ Universal input mains range: 90÷264Vac Frequency 45 ÷ 65 Hz ■ Output voltage: 19 V@4 A continuous operation ■ Mains harmonics: Acc. to EN61000-3-2 Class-D ■ ST-by mains consumption: Less than 0.25 W @265Vac ■ Overall efficiency: Better than 86% ■ EMI: According to EN55022-Class-B ■ Safety: According to EN60950 ■ Low profile design: 25 mm maximum height ■ PCB single layer: single side, 70 µm, CEM-1, 78x174 mm, Mixed PTH/SMT Description In this data brief of the EVL6566A-75WADP demo board, the main characteristics and features of a 75 W adapter wide-range input mains, powerfactor-corrected AC-DC adapter using the new L6566A controller and the L6563 dedicated to the PFC stage are described. High efficiency and the very low standby input consumption are highlighted in the following figures and tables. The board is programmed for working at fixed frequency (65 kHz) under nominal condition (19 V at 4 A). On the secondary side the TSM1014 with a precise voltage reference and the optocoupler SFH617A-4 to transfer the error amplifiers information to the primary side have been used. September 2007 Rev 1 For further information contact your local STMicroelectronics sales office. 1/8 www.st.com 8 Efficiency 1 EVL6566A-75WADP Efficiency Table 1 below shows the efficiency with two different input voltages. The table begins with the nominal load at 80 W on the output and it displays the efficiency at every power decrease of 5 W. Table 1. Efficiency measurements 230 V-50 Hz 115 V-60 Hz Pin Pout Eff. Pin Pout Eff. 85.73 75.05 87.5% 87.24 75.06 86.0% 80.56 70.00 86.9% 80.73 70.00 86.7% 74.91 65.01 86.8% 74.34 65.01 87.4% 68.68 59.97 87.3% 68.95 60.00 87.0% 62.40 55.01 88.2% 63.80 55.02 86.2% 56.96 50.00 87.8% 58.03 50.04 86.2% 52.31 45.02 86.1% 51.80 45.05 87.0% 47.03 40.00 85.1% 45.45 40.00 88.0% 41.01 35.05 85.5% 40.53 35.05 86.5% 34.40 30.00 87.2% 35.15 30.00 85.3% 29.60 25.02 84.5% 29.00 25.02 86.3% 24.70 20.00 81.0% 23.07 20.00 86.7% 17.86 14.94 83.7% 18.36 15.05 82.0% 11.98 10.00 83.5% 11.88 10.00 84.2% 6.64 5.01 75.5% 6.10 5.05 82.8% 2.73 1.99 72.9% 2.53 1.99 78.7% Above the 20 W power output, the efficiency is constant over 85%. Figure 1. 2/8 Overall efficiency versus output power at nominal mains voltages EVL6566A-75WADP 2 Full load Full load Figure 2 and Figure 3 below show the drain and gate fly-back waveforms and the relevant switching frequency at full load. Figure 2. L6566A fly-back stage waveforms at 115 V-60 Hz full load CH1: drain 6566A CH2: gate 6566A Figure 3. L6566A fly-back stage waveforms at 230 V-50 Hz full load CH1: drain 6566A CH2: gate 6566A 3/8 Light load condition (fold back frequency) 3 EVL6566A-75WADP Light load condition (fold back frequency) To improve the efficiency at light load, a frequency shifting has been implemented on the board. Thus, at decreasing load, the frequency also decreases. Figure 4 and Figure 5 below show the drain and gate fly-back waveforms and the relevant switching frequency with a load of 0.2 A. Figure 4. L6566A fly-back stage waveforms at 115 V-60 Hz 0.2 A Figure 5. L6566A fly-back stage waveforms at 230 V-50 Hz full load CH1: drain 6566A CH2: gate 6566A CH1: drain 6566A CH2: gate 6566A Table 2 below shows the efficiency when we set the power input with 2.4 or 1.7 W in two different voltage inputs with the fold back network plugged in. Table 2. Standby consumption Light load condition Vin = 230 V 4/8 Vin = 115 V Pin 2.40 1.69 2.41 1.71 Pout 1.51 1.06 1.70 1.14 Efficiency 62.9% 62.7% 70.5% 66.7% EVL6566A-75WADP 4 No-load No-load Table 3 gives the power consumption of the circuit during no-load operation. Figure 6 and Figure 7 show the main waveforms under this condition. Table 3. Figure 6. No-load consumption Vin [Vrms] Input power [W] 90 0.94 115 0.107 230 0.202 265 0.260 L6566A fly-back stage waveforms at 115 V-60 Hz no-load CH1: drain 6566A CH2: Vcc 6566A CH3: Vout adapter Figure 7. L6566A fly-back stage waveforms at 230 V-50 Hz no-load CH1: drain 6566A CH2: Vcc 6566A CH3: Vout adapter 5/8 90-264Vac 1 2 3 R18 51K R15 100K R12 3M3 R7 3M3 C3 470N F1 FUSE 4A R34 390K R26 0R0 C19 2N2 C15 1u C21 470N R17 62K C25 220p C9 100N C2 2N2 C1 2N2 R30 22K 7 6 5 4 3 2 1 C26 22N PFC-OK TBO VFF CS MULT RUN ZCD GND GD VCC ~ R33 0R0 PWM-LATCH 8 9 10 11 12 13 14 D2 GBU4J PWM-STOP U1 L6563 COMP INV C4 470N L1 HF2422-203Y1R0-T01 R50 1K0 _ Q3 BC847C R23 27R C14 220N C5 470N - 400V C23 100N 8 6 D1 R62 100K R4 68K D3 STTH2L06 R27 0R33 R63 100K C38 220p R8 75K C40 10N R9 75K R6 680K R2 680K R28 680K C6 100u - 450V R1 NTC 10R-S236 C33 47u - 50V HS1 HEAT-SINK Q2 STP9NK50ZFP C32 100N R64 150K R25 470R R24 100K 3 5 1N4005 L2 SRW25CQ-T05V102 8 7 6 5 4 3 2 1 R58 M57703 R59 12K 16 9 10 11 12 13 14 15 C39 100N COMP VREF ZCD MODE/SC OSC SS VFF AC_OK OTP PROT DIS CS VCC_PFC VCC GD GND N.C. HV U6 L6566A R42 33K C30 2N2 R19 3K0 R10 33K R11 2M2 R5 2M2 R3 2M2 C41 10N C34 47N Q9 BC857C R37 10K R74 47K R70 18K R60 6K8 D16 LL4148 R72 0R0 R51 1K0 R35 2R7 R46 15R D12 R43 LL4148 4R7 D11 STTH102A R57 100R R52 0R56 R47 100K R53 0R56 HS2 HEAT-SINK Q5 STP10NK80ZFP D8 STTH108A D4 1.5KE250A R32 15K R31 39K 9 8 5-6 2-3 C8 1N0 U3 SFH617A-4 T1 SRW32EC-T01H114 C24 2N2 10-11 15-16 HS3 HEAT-SINK C7 2N2 R66 3R9 R54 47K R36 1K8 R45 2K2 C35 220N 1000u - 25V C16 R48 4K7 D7 C12 STPS20H100CFP D5 STPS20H100CFP R14 3R9 4 ~ J1 MKDS 1,5/ 3-5,08 1 + 6/8 3 R49 24K R39 56K R76 4K7 R75 1K8 D17 BZV55-B18 R78 2K2 C44 1N R68 220K R67 12K R22 R015 Q11 BC847C Q10 BC847C R77 100K 100u - 25V R65 22K 4 3 2 1 U5 CV- CC+ CC- 2 1 J2 VCC GND 6 5 C43 2N2 TSM1014AIST CV_OUT 7 8 19V@4A MKDS 1,5/ 2-5,08 CC_OUT C17 100N V_REF R69 1K0 C13 L3 TSL0706 - 1R5-4R3 C36 100N R55 22R Figure 8. 1000u - 25V 5 2 Schematic EVL6566A-75WADP Schematic EVL6562A-TM-80W schematic EVL6566A-75WADP 6 Revision history Revision history Table 4. Document revision history Date Revision 28-Sep-2007 1 Changes Initial release 7/8 EVL6566A-75WADP Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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