Datasheet LT3753 (Analog Devices) - 36
| Manufacturer | Analog Devices |
| Description | Active Clamp Synchronous Forward Controller |
| Pages / Page | 36 / 36 — TYPICAL APPLICATION. Efficiency and Power Loss. Figure 22. 18V to 72V, … |
| Revision | B |
| File Format / Size | PDF / 1.7 Mb |
| Document Language | English |
TYPICAL APPLICATION. Efficiency and Power Loss. Figure 22. 18V to 72V, 12V/8A Active Clamp Isolated Forward Converter
Model Line for this Datasheet
Text Version of Document
LT3753
TYPICAL APPLICATION
4:4 L1 V T1 6.8µH IN VOUT 18V to 12V/8A 72V C1 4.7µF • • R24 C18 D2 20k 68pF + C20 × 3 R1 100k VIN C10 C19 C17 470µF C11 UVLO_VSEC 2.2µF 22µF 2.2nF 100nF × 2 R2 C9 100V R16, 2k R25 M2 5.9k 100nF FSW 100k M3 OVLO AOUT FG FB R3 R17, 2k R26 R14 1.82k LT3753 D1 CSW 10k LT8311 11.3k R18, 1.78k M1 CSP M4 IVSEC OUT D3 CG VIN VOUT R4 240kHz RT R13, 2k R23 71.5k R5 R19, 1.78k SYNC ISENSEP 100k 31.6k CSN S PGOOD OUT OC R12 6mΩ R20, 1.5k OPTO TAO ISENSEN INTVCC COMP C15 TAS C12 SYNC PMODE 4.7µF TOS INTVCC 15nF SS TIMER GND TBLNK C6 COMP C5 4.7µF R11 R6 GND SS1 SS2 FB 10pF 100Ω R21 C16 R22 49.9k R8 2.94k 2.2µF 124k R7 100k C7 PS2801-1 C3 34k 1µF C14 0.47µF R9 C4 1µF 100k 1µF 3753 F22 R10 1k T1: CHAMPS G45R2-0404.04
Efficiency and Power Loss
2.2nF L1: CHAMPS PQR2050-6R8 96 14 M1: INFINEON BSC077N12NS3 V M2: INTERNATIONAL RECTIFIER IRF6217 IN = 48V M3: FAIRCHILD SEMI. FDMS86101DC 12 M4: INFINEON BSC077N12NS3 94 D2: CENTRAL SEMI. CMMR1U-02 10 POWER LOSS (W) D3: DIODES INC. SBR1U150SA 92 8 90 6 EFFICIENCY (%) 4
Figure 22. 18V to 72V, 12V/8A Active Clamp Isolated Forward Converter
88 2 86 0 0 2 4 6 8 10 LOAD CURRENT (A) 3753 F22a
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT3752/LT3752-1 Active Clamp Synchronous Forward Controllers with Ideal for Medium Power 24V, 48V and Up to 400V Input Applications Internal Housekeeping Controller LT8311 Preactive Secondary Synchronous and Opto Control Optimized for Use with Primary-Side LT3752-1, LT3753 and LT8310 for Forward Converters Controllers LTC3765/LTC3766 Synchronous No-Opto Forward Controller Chip Set Direct Flux Limit, Supports Self Starting Secondary Forward Control with Active Clamp Reset LTC3722/LTC3722-2 Synchronous Full Bridge Controllers Adaptive or Manual Delay Control for Zero Voltage Switching, Adjustable Synchronous Rectification Timing LT3748 100V Isolated Flyback Controller 5V ≤ VIN ≤ 100V, No Opto Flyback , MSOP-16 with High Voltage Spacing LT3798 Off-Line Isolated No-Opto Flyback Controller with VIN and VOUT Limited Only by External Components Active PFC Rev. B 36 08/19 www.analog.com For more information www.analog.com © ANALOG DEVICES, INC. 2014–2019 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Package Description Revision History Typical Application Related Parts
TYPICAL APPLICATION
4:4 L1 V T1 6.8µH IN VOUT 18V to 12V/8A 72V C1 4.7µF • • R24 C18 D2 20k 68pF + C20 × 3 R1 100k VIN C10 C19 C17 470µF C11 UVLO_VSEC 2.2µF 22µF 2.2nF 100nF × 2 R2 C9 100V R16, 2k R25 M2 5.9k 100nF FSW 100k M3 OVLO AOUT FG FB R3 R17, 2k R26 R14 1.82k LT3753 D1 CSW 10k LT8311 11.3k R18, 1.78k M1 CSP M4 IVSEC OUT D3 CG VIN VOUT R4 240kHz RT R13, 2k R23 71.5k R5 R19, 1.78k SYNC ISENSEP 100k 31.6k CSN S PGOOD OUT OC R12 6mΩ R20, 1.5k OPTO TAO ISENSEN INTVCC COMP C15 TAS C12 SYNC PMODE 4.7µF TOS INTVCC 15nF SS TIMER GND TBLNK C6 COMP C5 4.7µF R11 R6 GND SS1 SS2 FB 10pF 100Ω R21 C16 R22 49.9k R8 2.94k 2.2µF 124k R7 100k C7 PS2801-1 C3 34k 1µF C14 0.47µF R9 C4 1µF 100k 1µF 3753 F22 R10 1k T1: CHAMPS G45R2-0404.04
Efficiency and Power Loss
2.2nF L1: CHAMPS PQR2050-6R8 96 14 M1: INFINEON BSC077N12NS3 V M2: INTERNATIONAL RECTIFIER IRF6217 IN = 48V M3: FAIRCHILD SEMI. FDMS86101DC 12 M4: INFINEON BSC077N12NS3 94 D2: CENTRAL SEMI. CMMR1U-02 10 POWER LOSS (W) D3: DIODES INC. SBR1U150SA 92 8 90 6 EFFICIENCY (%) 4
Figure 22. 18V to 72V, 12V/8A Active Clamp Isolated Forward Converter
88 2 86 0 0 2 4 6 8 10 LOAD CURRENT (A) 3753 F22a
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT3752/LT3752-1 Active Clamp Synchronous Forward Controllers with Ideal for Medium Power 24V, 48V and Up to 400V Input Applications Internal Housekeeping Controller LT8311 Preactive Secondary Synchronous and Opto Control Optimized for Use with Primary-Side LT3752-1, LT3753 and LT8310 for Forward Converters Controllers LTC3765/LTC3766 Synchronous No-Opto Forward Controller Chip Set Direct Flux Limit, Supports Self Starting Secondary Forward Control with Active Clamp Reset LTC3722/LTC3722-2 Synchronous Full Bridge Controllers Adaptive or Manual Delay Control for Zero Voltage Switching, Adjustable Synchronous Rectification Timing LT3748 100V Isolated Flyback Controller 5V ≤ VIN ≤ 100V, No Opto Flyback , MSOP-16 with High Voltage Spacing LT3798 Off-Line Isolated No-Opto Flyback Controller with VIN and VOUT Limited Only by External Components Active PFC Rev. B 36 08/19 www.analog.com For more information www.analog.com © ANALOG DEVICES, INC. 2014–2019 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Package Description Revision History Typical Application Related Parts
