STEVAL-ISA211V1 STMicroelectronics

STEVAL-ISA211V1 Data brief 100 W, ultra-wide range flyback converter based on L6566BH Features Wide input voltage range: 230 to 690 V AC 250 to 1000 V DC Output 24 V/100 W Short time undervoltage (long time for 50 W output) down to 150 V /180 V DC AC Selectable fixed-frequency or quasi-resonant operation Embedded 1 kV high voltage startup Modified soft-start circuit Optional brownout protection RoHS compliant Description The STEVAL-ISA211V1 flyback converter is designed for industrial or photovoltaic sectors to be used as an auxiliary power supply. The 24 V/100 W output with reinforced isolation can be used in several applications. The input voltage range starts from standard Europe voltage (230 V ) and ends at AC 690 V or 1 kVDC. For short-time periods or lower output power, the converter can AC operate with voltage decreased down to 150 V . DC The STEVAL-ISA211V1 is based on the L6566BH multi-mode controller and STW12N170K5 1700 V MDmesh K5 Power MOSFET, in one-switch Flyback topology Product summary with isolated output. 100 W, ultra-wide L6566BH integrates 840 V high voltage startup which is boosted by the range flyback STEVAL- STD1NK60T4 Power MOSFET up to 1 kV. converter based on ISA211V1 L6566BH The converter operates in fixed-frequency mode but it can be easily set to quasi- resonant mode by changing one resistor. Multi-mode controller L6566BH for SMPS N-channel 1700 V, 2.3 Ohm typ., 5 A STW12N170K5 MDmesh K5 Power MOSFET Auxiliary SMPS Applications Industrial Power Supply DB4245 - Rev 1 - December 2020 www.st.com For further information contact your local STMicroelectronics sales office.STEVAL-ISA211V1 Schematic diagrams DB4245 - Rev 1 page 2/4 1 Schematic diagrams Figure 1. STEVAL-ISA211V1 circuit schematic F1 N/A V+ D1 L2 680uH NTC NTC NTC L1 C7 C8 La Lb Lc Ld Le 2x3.6mH W V+a + F2 SPF 8A R1 R2 R3 N/A N/A Cc1 Cc2 C5 C6 J1 10R 10R 10R V R4 C10 1 L 100nF 100nF N/A 2 N Na - D2 D3 D4 D5 D6 D7 U Cc3 3 PE N/A N/A N/A SGBJ2516 Input C2 C4 1.5KE350A 1.5KE350A 1.5KE350A C9 PEa N/A GND 2n2 2n2 Snubber D8 STTH112 C1 C3 PEb 2n2 2n2 Rf Rh C34 C35 V+ R12 4n7 4n7 R14 R15 R16 R17 R18 1K ca1M ca1M ca1M ca1M ca100k R13 GND2 Re Rg Ri GND ca1M R5 R19 470k C15 C24 R20 1K R21 Ra 330k / N/A 2n2 2n2 C11 C12 0R 68uF / 400V 68uF / 400V R6 Q2 R22 470k 1 BC817 R7 Q1 1k5 H2 Ga G 1 D15 D13 GND STD1NK60 STPS1150 1K C18 R8 33u Vout J2+ BAT48 T1 470k D12 C19 D14 S C20 J4 15V U1 L6566B(H) 47u 18V 6 14 2 Rb 100n D11 C13 C14 1 68uF / 400V 68uF / 400V GS 1 16 R9 HV AC OK D17 STPS20LCD200 C31 C32 Output C36 C37 470k 1200uF 1200uF J3 100n 100n 15V 15 VFF R28 Rc 7 47k 14 5 8 SS VCC GND GND R26 R10 12 11 Mode/SC ZCD 470k GND N/A / 0R GND2 D10 D9 10 4 Rd C16 C17 VREF GD BAT48 BAT48 V+ 68uF / 400V 68uF / 400V C21 R23 6 7 3 1 R11 FMODCS IN Gate N/A 16k / 330k 470k C27 13 9 4 5 1 OSC COMP GND Source R24 33n Snubber N/A C22 R27 GD1 330p N/A GND C23 C26 GND C25 C29 R25 10n 33n 3 100n N/A 39k Q3 R30 N/A D16 N/A GND C30 H1 Vout N/A U2 R35 1 R31 10R 330R R36 R37 R32 9k1 Optoisolator1 FF: R28 & R26 N/A R25 39k R23 330k 1k1 0R GND QR: R26 0R R25 16k GND R33 C28 GND OCP Latch: D9 N/A 330m S1 N/A R38 OCP AutoRestart: D9 BAT41 AC OK & VFF not used -> R20 330k, R19 0R 22k R39 S2 C33 120k AC OK & VFF not used - > R12-18 N/A, C15 & C24 N/A U3 10n GND GND TL431 SMD S3 R34 1k R40 S4 15k GND2 3 2 VAR 8 DIS 3 GND 1 3 2 4 2 VCC 2 3 3 2