for further information contact your local stmicroelectronics sales office. may 2014 docid025362 rev 2 1/5 STEVAL-ISA143V1 12 v - 150 w resonant converter with synchronous rectification using the l6563h, l6699 and srk2000 data brief 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) ? 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 m, fr-4, mixed pth/smt ? rohs compliant www.st.com
description STEVAL-ISA143V1 2/5 docid025362 rev 2 1 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.
docid025362 rev 2 3/5 STEVAL-ISA143V1 schematic diagram 5 2 schematic diagram figure 1. STEVAL-ISA143V1 circuit schematic 12v-12.5a 90-264v a c evl s rk2000-l-40 rev 1. 3 connection made by rework 56k 0 1 r0 1 r 2 7 6 4 9 10 12 13 8 11 14 t1 1860.0069 r77 1k0 c14 6 68 8n n 1n0 0 1 c0 1 c c20 2n2-y1 2 4 r2 4 r 0 k 10 k 1 1 s gnd 2 en 3 dv s 1 4 dv s 2 gd2 5 pgnd 6 gd1 7 vcc 8 u501 s rk2000 r54 0r0 d6 ll414 8 2 1 d12 bzv55-c4 3 c22 220pf r66 n.m. r501 10r c4 470n-x2 0r22 2 2 r 2 2 r 2k2 1 5 r5 r33 2 4 3 u4 s fh617a-2 4n7 c4 3 1 3 2 q6 n.m. r69 24k r79 270r r502 10r cc 33 66 11 uu v 0 5 - fv 0 5 - f c2 8 22nf 470n c3 2 j2 fa s ton 1 6 r1 6 r . m . n. m . n 2 1 d15 n.m. 1 3 2 q5 n.m. 9 4 r9 4 r k 1 9k 1 9 c501 4nf7 r11 2m2 c24 220 uf-50v 5 7 r5 7 r 0 r 00 r 0 1 2 d17 ll414 8 . m . n. m . n cc 33 55 100n cc 33 99 c3 0 470 uf-16v c41 n.m. 1 inv 2 comp 3 mult 4 cs 5 vff 6 tbo 7 pfc-ok 8 pwm-latch pwm- s top 11 run 12 zcd 1 3 gnd 14 gd 15 vcc 16 hv s 9 nc 10 u1 l656 3 h r5 8 100k 5k6 r6 8 c502 100nf r 7 4r 7 4 rr 33 22 c11 2n2 r71 1k0 10 11 1 2 3 4 5 6 7 8 9 12 13 1 0 5 p j 1 0 5 p j c15 47uf-50v r16 2k7 1 2 ll414 8 d2 rx1 0r0 r20 33r rr 33 66 m 1m 188 c2 2n2-y1 1 2 4 3 l1 2019.0002 100r r41 r60 10k c37 470 uf-16v 2 4 3 1 d1 gbu gbu 8 8 j j ++ ~~ ~~ __ 2 1 1 bzv55-b15 0 2 d0 2 d c19 100n c50 3 1 u f 3 2 q 8 bc 8 47c r64 10meg c45 220nf 220nf r 1 5r 1 5 4 r4 r 33 1 y - 2 n 21 y - 2 n 2 cc 33 1 2 3 4 10 5 6 7 8 9 11 12 1 3 1 2 d18 ll414 8 r74 n.m. r56 n.m. r40 0r6 8 k 7 4k 7 4 4 r 4 r88 r505 33k c4 8 1n0 r25 56r 56r r38 n.m. r39 2m2 r3 d502 ba s3 16 330pf 7 1 c 7 1 c n.m. 2 6 r 2 6 r r21 22r 5 5 r5 5 r 7 k 27 k 2 r45 3 3 r r 3 3 470n - 520v 5 c 5 c r19 56k 56k 100k 6 4 r6 4 r r5 75r n.m. cc 33 11 q502 s tl140n4llf5 r24 1m0 1m0 c12 1uf r27 470r r9 160k 9 2 r9 2 r 0 k 10 k 1 22r r7 3 r507 330r c40 100n c8 10u f-50v 4 cv- cv_out 5 1 v_ref 3 cc+ gnd 6 2 cc- cc_out 7 vcc 8 u5 t s m1014ai s t 1 2 d4 s tth5l06 r14 100k c9 100 uf - 450v r2 5m6 r 3 4 8 k2 r504 150k c25 1.5nf 4 4 c4 4 c f n 5 . 1 f n 5 . 1 r4 n.m. n.m. r7 8 33r r44 6k2 c50 470 uf-16v 2m2 r8 0 5 r 0 5 r k 2 1k 2 1 r506 330r c33 1n5 1 2 d3 1n4005 1n4005 n 0 0 1n 0 0 1 cc 33 44 c52 1n0 hs 1 heat- sink r59 100k r70 22k d505 n.m. c46 n.m. r57 r002 2 1 3 q3 stf 8 nm50n r7 2m2 q501 s tl140n4llf5 c7 100n 1 2 d19 ll414 8 9k1 r1 3 r 3 5 180k c21 2n2-y1 c38 100n 220k r 37 c42 100n r12 2m2 5 1 r5 1 r k 6 5k 6 5 r1 8 82k 10n c2 3 1 x p j1 x p j r6 ntc 2r5- s 237 470n-x2 1 c1 c 11 3 9 5 l2 1975.0004 4u7f 1 c1 c88 c26 10uf-50v 1 2 d14 ll414 ll414 8 8 r1 6m 8 r6 3 0r0 1 css 2 delay 3 cf 4 rfmin 5 s tby 6 is en 7 line gnd 10 lvg 11 vcc 12 nc 13 out 14 hvg 15 vboot 16 u2 l6699d 8 dis pfc- s top 9 r 33 n.m. 1 2 d5 ll414 8 1 2 3 q7 n.m. 1 o u t 2 gnd 3 vp vm 4 vcc 5 u6 t s c101 1 2 n.m. d13 r67 n.m. 20k r509 n.m. rr 33 11 r76 33 k c29 470 u f-16v 1 2 d16 n.m. n.m. f1 fu s e t4a j3 fa s ton 1 2 4 3 u3 s fh617a-2 r72 330k 1 2 d21 ll414 8 c504 n.m. r50 8 n.m. 1 2 3 j1 mkd s 1,5/ 3-5,0 8 c49 470 uf-16v c16 2n2 2n2 1m0 6 2 r6 2 r c1 3 68 0n c47 1n0 c27 220pf-6 30v d50 3 n.m. c6 330n c505 n.m. d501 ba s3 16 1 3 2 q9 bc 8 47c 2 1 3 q4 s tf 8nm50n 1 5 r 1 5 r k 1 9k 1 9 r65 n.m. r52 1k5 7 4 r 7 4 r . m . n. m . n 10r r50 3 r2 8 33 k 1 2 3 q2 bc 8 57 1 2 d7 1 2 s stp tp s s 140z 140z d9 s tp s 2h100a 10r rr 33 00 c51 100n 0r22 2 r 2 r 33 r17 2m2 2 1 3 q1 s tf21nm65m5
revision history STEVAL-ISA143V1 4/5 docid025362 rev 2 3 revision history table 1. document revision history date revision changes 15-jan-2014 1 initial release. 08-may-2014 2 added new features.
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