Datasheet LT8311 (Analog Devices) - 46
| Fabricante | Analog Devices |
| Descripción | Synchronous Rectifier Controller with Opto-Coupler Driver for Forward Converters |
| Páginas / Página | 48 / 46 — TYPICAL APPLICATIONS. 75V to 150V, 24V/14A 340W Active Clamp Isolated … |
| Formato / tamaño de archivo | PDF / 744 Kb |
| Idioma del documento | Inglés |
TYPICAL APPLICATIONS. 75V to 150V, 24V/14A 340W Active Clamp Isolated Forward Converter
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LT8311
TYPICAL APPLICATIONS 75V to 150V, 24V/14A 340W Active Clamp Isolated Forward Converter (Using Gate Drive Transformer for High Side Active Clamp)
T1 VIN VOUT 10:6 75V TO 24V 150V D3 L1 R35 INTV R19 14A CC T2 VAUX C15 • • 15µF 1k D4 R38 + 102k D2 C14 • • C10 4.7nF C1 10k 250V C8 1PB072N15N3G 470µF 2.2µF C9 4.7µF D5 25V R36 250V 10µF • 15nF C22 C23 3.3nF 102k M4 250V 220nF C13 M5 T4 M2 BSC047N08NS3 C24 22µF BSP300 • • D1 IRFL214 ×2 R38 10nF 25V C20 R16 C21 M3 0.003Ω 250V ×4 10µF R17 R18 10k R37 470pF 499Ω 0.15Ω 100Ω R21 C27 R22 100Ω 120pF 100Ω R34 IPB200N25N3 698k VIN HOUT HISENSE AOUT OUT M1 VAUX VIN OC C11 FG CG FSW CSW CSN CSP R1 SYNC I R27 SENSEP 2.2µF R30 C28 6.98k R14 100k GND R15 100k 68pF UVLO_VSEC LT8311 2k FB 0.0075Ω PGOOD R2 T3 SYNC 6.04k I R31 SENSEN LT3752-1 OVLO C6 220pF 5.36k • • R13 TO V CC R3 SOUT 560Ω OP INT PMODE TIMER SS COMP 5.76k INTV INTV CC CC GND R28 VAUX C17 C18 R29 R25 3.16k 0.33µF 100pF R11 C12 5.11k C5 100Ω 10k PS2801-1 4.7µF R20 HFB 4.7µF C19 T AO T AS T OS T BLNK IVSEC RT SS1 SS2 HCOMP FB COMP 365k R12 22nF C16 R5 R7 R9 C3 R10 806Ω 8311 TA08a 1µF 53k 80.1k 52.3k 0.22µF 22k R4 R6 R8 R24 C2 R23 R26 93.1k 10k 82.5k 22k 0.47µF C4 22k 1.2k 2.2nF 3.3nF T1: CHAMPS LT80R2-12AC-1006 T2: WÜRTH 750817020 T3: PULSE PE-68386NL T4: ICE GT05-111-100 L1: COILCRAFT AGP2923-153 D1: CENTRAL SEMI CMR1U-10 D2, D3, D5: BAS516 D4: CENTRAL SEMI CMMR1U-02
Efficiency vs Load Current
96 95 94 93 92 91 90 EFFICIENCY (%) 89 88 VIN = 75V VIN = 100V 87 VIN = 125V VIN = 150V 86 0 2.5 5 7.5 10 12.5 15 LOAD CURRENT (A) 8311 TA08b 8311f 46 For more information www.linear.com/LT8311 Document Outline Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation FUNDAMENTALS OF FORWARD CONVERTER OPERATION IN CCM LT8311 SYNCHRONOUS CONTROL SCHEMES PREACTIVE MODE SYNCHRONOUS CONTROL SYNC MODE SYNCHRONOUS CONTROL OPTO-COUPLER CONTROL Applications Information VIN BIAS SUPPLY INTVCC BIAS SUPPLY LT8311 OPTO CONTROL FUNDAMENTALS LT8311 SYNCHRONOUS CONTROL FUNDAMENTALS PREACTIVE MODE SYNCHRONOUS CONTROL SYNC MODE SYNCHRONOUS CONTROL Typical Applications Package Description Typical Application Related Parts
TYPICAL APPLICATIONS 75V to 150V, 24V/14A 340W Active Clamp Isolated Forward Converter (Using Gate Drive Transformer for High Side Active Clamp)
T1 VIN VOUT 10:6 75V TO 24V 150V D3 L1 R35 INTV R19 14A CC T2 VAUX C15 • • 15µF 1k D4 R38 + 102k D2 C14 • • C10 4.7nF C1 10k 250V C8 1PB072N15N3G 470µF 2.2µF C9 4.7µF D5 25V R36 250V 10µF • 15nF C22 C23 3.3nF 102k M4 250V 220nF C13 M5 T4 M2 BSC047N08NS3 C24 22µF BSP300 • • D1 IRFL214 ×2 R38 10nF 25V C20 R16 C21 M3 0.003Ω 250V ×4 10µF R17 R18 10k R37 470pF 499Ω 0.15Ω 100Ω R21 C27 R22 100Ω 120pF 100Ω R34 IPB200N25N3 698k VIN HOUT HISENSE AOUT OUT M1 VAUX VIN OC C11 FG CG FSW CSW CSN CSP R1 SYNC I R27 SENSEP 2.2µF R30 C28 6.98k R14 100k GND R15 100k 68pF UVLO_VSEC LT8311 2k FB 0.0075Ω PGOOD R2 T3 SYNC 6.04k I R31 SENSEN LT3752-1 OVLO C6 220pF 5.36k • • R13 TO V CC R3 SOUT 560Ω OP INT PMODE TIMER SS COMP 5.76k INTV INTV CC CC GND R28 VAUX C17 C18 R29 R25 3.16k 0.33µF 100pF R11 C12 5.11k C5 100Ω 10k PS2801-1 4.7µF R20 HFB 4.7µF C19 T AO T AS T OS T BLNK IVSEC RT SS1 SS2 HCOMP FB COMP 365k R12 22nF C16 R5 R7 R9 C3 R10 806Ω 8311 TA08a 1µF 53k 80.1k 52.3k 0.22µF 22k R4 R6 R8 R24 C2 R23 R26 93.1k 10k 82.5k 22k 0.47µF C4 22k 1.2k 2.2nF 3.3nF T1: CHAMPS LT80R2-12AC-1006 T2: WÜRTH 750817020 T3: PULSE PE-68386NL T4: ICE GT05-111-100 L1: COILCRAFT AGP2923-153 D1: CENTRAL SEMI CMR1U-10 D2, D3, D5: BAS516 D4: CENTRAL SEMI CMMR1U-02
Efficiency vs Load Current
96 95 94 93 92 91 90 EFFICIENCY (%) 89 88 VIN = 75V VIN = 100V 87 VIN = 125V VIN = 150V 86 0 2.5 5 7.5 10 12.5 15 LOAD CURRENT (A) 8311 TA08b 8311f 46 For more information www.linear.com/LT8311 Document Outline Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation FUNDAMENTALS OF FORWARD CONVERTER OPERATION IN CCM LT8311 SYNCHRONOUS CONTROL SCHEMES PREACTIVE MODE SYNCHRONOUS CONTROL SYNC MODE SYNCHRONOUS CONTROL OPTO-COUPLER CONTROL Applications Information VIN BIAS SUPPLY INTVCC BIAS SUPPLY LT8311 OPTO CONTROL FUNDAMENTALS LT8311 SYNCHRONOUS CONTROL FUNDAMENTALS PREACTIVE MODE SYNCHRONOUS CONTROL SYNC MODE SYNCHRONOUS CONTROL Typical Applications Package Description Typical Application Related Parts