STEVAL-ISA143V1

STEVAL-ISA143V1 12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6699 and SRK2000 Data brief • Efficiency at nominal load: > 91% at 115 VAC • EMI: in accordance with EN55022 Class-B • Safety: in accordance with EN60950 • Dimensions: 65 x 154 mm, maximum component height = 28 mm • PCB: double-sided, 70 µm, FR-4, mixed PTH/SMT • RoHS compliant Features • Input mains range: 90 - 264 VAC, 45 - 65 Hz • Output voltage: 12 V at 12.5 A continuous operation • Mains harmonics: in accordance with EN61000-3-2 Class-D or JEITA-MITI Class-D • No load consumption: < 0.15 W according to European CoC Tier 2 for external power supplies • Minimum four points average efficiency in active mode: > 89% according to European CoC Tier 2 for external power supplies • Minimum efficiency in active mode at 10% load of full rated output current: > 79% according to European CoC Tier 2 for external power supplies • Light load efficiency: complies with ErP Lot 6 Tier 2 (> 50% @ 250 mW) May 2014 DocID025362 Rev 2 For further information contact your local STMicroelectronics sales office. 1/5 www.st.com Description 1 STEVAL-ISA143V1 Description The STEVAL-ISA143V1 system evaluation board is made up of two stages: a front-end PFC using the L6563H, an LLC resonant converter based on the L6699 and the SRK2000, controlling the SR MOSFETs on the secondary side. The SR driver and the rectifier MOSFETs are mounted on a daughterboard. The L6563H is a current mode PFC controller operating in transition mode and implements a high voltage startup source to power on the converter. The L6699 integrates all the functions necessary to properly control the resonant converter with a 50% fixed duty cycle and work with variable frequency. The output rectification is managed by the SRK2000, an SR driver dedicated to LLC resonant topology. The PFC stage works as pre-regulator and powers the resonant stage with a constant voltage of 400 V. The downstream converter operates only if the PFC is on and regulating. In this way, the resonant stage can be optimized for a narrow input voltage range. The L6699’s LINE pin (pin 7) is dedicated to this function. It is used to prevent the resonant converter from working with too low an input voltage, which can cause incorrect capacitive mode operation. If the bulk voltage (PFC output) is below 380 V, the resonant startup is not allowed. The L6699 LINE pin internal comparator has a hysteresis allowing the turn-on and turn-off voltage to be independently set. The turn-off threshold is set to 300 V, allowing the resonant stage to operate in case of mains sag and consequent PFC output dip. The transformer uses the integrated magnetic approach, incorporating resonant series inductance. Therefore, no external, additional coil is needed for the resonance. The transformer configuration chosen for the secondary winding is center tap. On the secondary side, the SRK2000 core function switches on each synchronous rectifier MOSFET whenever the corresponding transformer half-winding starts conducting (i.e. when the MOSFET body diode starts conducting) and then switches it off when the flowing current approaches zero. For this purpose, the IC is provided with two pins (DVS1 and DVS2) sensing the MOSFETs’ drain voltage level. The SRK2000 automatically detects light load operation and enters Sleep mode, disabling MOSFET driving and decreasing its own consumption. This function allows greater power saving at light load compared to benchmark SR solutions. In order to decrease the output capacitor size, aluminum solid capacitors with very low ESR were favored over standard electrolytic ones. Therefore, high frequency output voltage ripple is limited and output LC filter is not required. This choice allows saving of output inductor power dissipation which can be significant in high output current applications such as this. 2/5 DocID025362 Rev 2 R 75 0R 0 BC 847C Q9 3 0R0 R54 R 26 1M0 VCC 16 GD 15 GND 14 ZCD 13 RUN 12 2 COMP 3 MULT 4 CS 5 VFF C46 N.M. R67 N.M. 1 CC3311 N.M. Q7 N.M. R 33 N.M. 1 R4 N.M. R16 2K7 C4 3 4N7 C7 100N RR3300 10R D3 1N4005 C8 10uF-50V D5 LL414 8 1 2 5 3 NC 13 4 RFMIN PFC- S TOP 9 GND 10 7 LINE 8 DIS LVG 11 6 IS EN VCC 12 OUT 14 5 S TBY HVG 15 2 DELAY VBOOT 16 2 D21 LL414 8 1 2 C40 C26 100N 10uF-50V HS 1 HEAT- S INK R 2 33 0R22 J P X1 R 35 180K R25 56R R5 8 100K 1 R59 100K R79 270R C25 R 39 1.5NF N.M. 56R R 38 1 C21 2N2-Y1 C20 2N2-Y1 C24 220 uF-50V R40 D9 S TP S 2H100A 0R6 8 1 2 R7 8 33R C27 220PF-6 30V R41 100R Q4 S TF 8NM50N Q3 S TF 8NM50N C9 100 uF - 450V D19 LL414 8 1 2 D18 LL414 8 1 2 R2 8 33K R1 3 9K1 R12 2M2 R11 2M2 R3 2M2 R8 2M2 R17 2M2 R7 2M2 R6 NTC 2R5- S 237 1 D4 S TTH5L06 Q1 S TF21NM65M5 C19 100N R 22 0R22 1 R 46 100K 3 CF 1 C SS U2 L6699D D6 LL414 8 R52 1K5 R20 33R C 33 1N5 R21 22R D14 R45 LL414 8 3 R 3 1 2 R69 D20 24K BZV55-B15 Q8 BC 847C 2 3 D2 LL414 8 R 5 33 2K2 2 D16 N.M. RR3366C 4 4 1 M881 . 5 N F 1M C6 330N C 1 7 330PF R24 1M0 C2 3 10N RR3322 47R C45 220NF 3 R 55 2K 7 R19 56K Q2 BC 857 C16 2N2 CC3399 100N R5 75R 9 11 1 C2 8 22NF C41 N.M. 7 6 4 2 13 14 10 11 12 8 9 CC3344 100N U4 S FH617A-2 CC3355 N . M. C501 4nF7 R50 8 N.M. R 4 88 47K R 49 91K CC3366 11uu F - 50V R 4 33 51R R507 R509 330RN.M. R506 330R RX1 0R0 R 47 N . M. R 42 1K 0 D505 N.M. D50 3 N.M. T1 1860.0069 U3 S FH617A-2 EVL S RK2000-L-40 J P 501 1 2 3 4 5 6 7 8 9 10 11 12 13 3 D17 LL414 8 2 R44 6K2 R 34 8K2 RR3311 20K C 1 88 4u7F R27 470R 8 PWM-LATCH HV S 9 C15 47uF-50V D7 S TP S 140Z 470N - 520V __ 1 C5 4 2 L2 1975.0004 2 4 CONNECTION MADE BY REWORK R60 10K R 29 1K 0 C 10 1N0 D1 GBU 8 J 3 ~~ 2 1 INV U1 L656 3H R 10 R9 160K 56K C4 470N-X2 L1 2019.0002 1 4 C22 6 TBO PWM- S TOP 11 220pF 7 PFC-OK NC 10 CC33 2 N 2 -Y 1 C2 2N2-Y1 C1 3 R1 8 680N 82K C14 68N C1 470N-X2 R 15 56K C11 2N2 R2 5M6 R1 6M8 D12 BZV55-C4 3 R76 33K 1N0 C52 1 1 2 3 D13 N.M. C12 1uF R 37 220K R14 100K 90-264V ac 1 1K0 R77 2 2 2 1 2 3 2 3 F1 FU S E T4A J1 MKD S 1,5/ 3-5,0 8 1 1 2 1 ~~ DocID025362 Rev 2 2 1 3 ++ 2 2 2 3 1 3 1 4 R 50 12K C504 N.M. R505 33k R71 1K0 C 32 470N R 51 91K 1 2 3 4 5 6 7 8 9 10 11 12 13 C505 N.M. R504 150K GD1 7 C47 1N0 GD2 5 C50 3 1uF R50 3 10R D501 BA S3 16 D502 BA S3 16 R502 10R R501 10R Q502 S TL140N4LLF5 Q501 S TL140N4LLF5 R72 330K R70 22K GND 6 Rev 1. 3 4 CV- CV_OUT 5 3 CC+ 2 CC- CC_OUT 7 VCC 8 U5 T S M1014AI S T 1 V_REF R64 10Meg C4 8 1N0 R74 N.M. R7 3 22R C51 100N R6 8 5K6 R 62 N.M. D15 N.M. C29 C50 C 37 C49 R56 470 uF-16V C 30 470 uF-16V 470 uF-16V 470 uF-16V 470 uF-16V N.M. 4 DV S 2 3 DV S 1 PGND 6 2 EN U501 S RK2000 1 S GND VCC 8 C502 100NF 1 Q6 N.M. R66 N.M. R57 R002 T S C101 U6 1 Out Vcc 5 2 GND 3 Vp Vm 4 R65 N.M. 1 Q5 N.M. 3 1 2 1 1 3 3 2 2 R 61 N . M. J3 FA S TON J2 FA S TON C 38 100N 12V-12.5A 100N R6 3 0R0 C42 2 2 STEVAL-ISA143V1 Schematic diagram Schematic diagram Figure 1. STEVAL-ISA143V1 circuit schematic 2 2 3/5 5 Revision history 3 STEVAL-ISA143V1 Revision history Table 1. Document revision history 4/5 Date Revision Changes 15-Jan-2014 1 Initial release. 08-May-2014 2 Added new features. DocID025362 Rev 2 STEVAL-ISA143V1 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. 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