SC4905A/B High Performance Voltage Mode PWM Controller POWER MANAGEMENT SC4905A/B Isolated 36V TO 72V Vin RCD reset Single switch Forward 12V 120W Output non Synchronous Rectification www.semtech.com SC4905A/B High Performance Voltage Mode PWM Controller POWER MANAGEMENT Start up An input supply voltage for the VIN ranging from 36V to 72V should be applied to CON2 Pin 1 (Positive), and CON2 Pin 4 (Negative). The output voltage of 12V @ 120W (Vout) can be loaded at CON1 Pin 9 (Positive), and CON1 Pin 5 (Negative) and verified at CON1 Pin 8 (Positive), and CON1 Pin 6 (Negative). An ON/OFF (ON open, OFF pulled to input ground) is also provided at CON1 Pin 2. Before applying the supply voltage, following steps should be performed by the user to analyze the SC4905 evaluation board: 1- Connect the supply to above mentioned terminals. If possible minimize all stray inductance due to long wiring by using twisted wires or short wire connection from the power supply to the terminals. 2- Connect all instruments (DVM, current meters, Loads, oscilloscope probes, etc.). More accurate measurements can be achieved if all stray inductances are minimized. 3- Apply the VIN supply Voltage. Loads and analyze the board. www.semtech.com SC4905A/B POWER MANAGEMENT Evaluation Board Schematics Vin+ CON2 ON/OFF Vin- 1 2 4 C38 220p, 16V 5 4 3 2 1 D6 ZM4742A 220p, 16V C28 499k R18 C14 1u,100V 1u,100V C13 280k R17 2k R19 R20 8.25k R3 49.9k C16 B R4 500 VDD R14 0 C18 1u, 16V C23 2.2u, 16V REF VDD = 12V VDD 6 7 8 9 10 10u,16V C17 E FZT853 Q1 C 0.1u,16V SC4905 U1 OUT REF FB ILIM GND VDD VFF SYNC DMAX RC 1 D8 8 T2 P8208T 7 3 N = 100 R13 10k R15 2.2 LS4448 R16 383 82p R32 768 C26 2 L1 LQH4N102K04 1 C A D1 LS4448 C D2 LS4448 3 s d MURD320 4 D5 R11 2.2 39.2k R10 g SUM85N15-19 D12 CMOSH-3 D7 4 5000 R7 5000 R6 VDD C1 10u,16V GRM42-2X5R106K16 (Murata) C11 U2 1N5819HW .033uF,250V VDD 3 5 SC1301A C19 1u, 16V 1 2 A M1 6 1 4 2 4T 6T T1 0 4T PA0389 .33uF,250V C15 11 7 1 VDD 2 1 4 C2 470pF,100V R1 10 3 4 3 1u, 16V C20 1u, 16V 1 L2 5 PA1494.532 + + + + + T491X107K016AS C24 10u,16V Vref Secondary Supply 1 2 D9 B140T C U4 R27 A C33 SC4431 82pF C35 30.1k SC4431 U6 4 4.7nF Vref Secondary Supply 1 4 + 0 0.1u,16V R24 3.74k R23 39.2k C9 C3 C4 C5 C6 C7 C8 100u,16V 100u,16V 100u,16V 100u,16V 100u,16V 100u,16V 1u, 16V C21 1u, 16V Secondary Supply D11 CMOSH-3 D14 C27 0 5 5 2 R2 0 R33 121 R9 0 C40 22nF C10 1u,16V R12 TBD R8 TBD R29 80.6k R31 9.1k 9 Vout- Sense- Trim Sense+ Vout+ CON1 8 7 6 5 C34 680pF R30 22.1k C39 1nF SC4905 Isolated non_sync 12V 120W (36V to 72V input voltage) SEMTECH CORPORATION C36 C37 0.1u,16V 22n, 16V R28 NA C29 C30 0.1u,16V 22n, 16V R22 2.2k CMOSH-3 C32 4 6 470pF,100V C12 10 R5 1 T3 R26 NA 1.1k R21 PE-68386 1 3 2 CMOSH-3 8 3 4 7 5 6 MOCD207 U5 D13 C25 4CMOSH-3 D10 D4 MBR2080CT 1 D3 MBR2080CT 3 5 SC1301A C22 1u, 16V U3 REF R25 1.1k C31 NA 3.74k Title Size Sheet 1 of Document Number SC4905 Isolated non_sync 12V 120W (36V to 72V input voltage) Date: Monday, April 22, 2002 1 Rev 1.2 www.semtech.com 1 2002 Semtech Corp. SC4905A/B POWER MANAGEMENT Evaluation Board Bill of Materials Bill Of Materials Item Quantity 1 2 3 4 5 6 7 8 9 10 1 1 3 2 6 4 1 1 2 1 11 7 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 1 1 2 2 2 1 1 1 1 1 3 2 1 1 1 1 5 1 1 1 1 2 3 1 1 2 2 2 2 1 1 1 1 1 1 2 1 2 1 1 1 1 1 1 1 1 1 1 1 2 2 1 2002 Semtech Corp. Reference CON1 CON2 C1,C17,C24 C12,C2 C3,C4,C5,C6,C7,C8 C9,C16,C29,C36 C10 C11 C13,C14 C15 C18,C19,C20,C21,C22,C25, C27 C23 C26 C38,C28 C30,C37 C31,C32 C33 C34 C35 C39 C40 D1,D2,D8 D3,D4 D5 D6 D7 D9 D10,D11,D12,D13,D14 L1 L2 M1 Q1 R5,R1 R2,R9,R14 R3 R4 R6,R7 R8,R12 R23,R10 R11,R15 R13 R16 R17 R18 R19 R20 R25,R21 R22 R26,R24 R27 R28 R29 R30 R31 R32 R33 T1 T2 T3 U1 U3,U2 U4,U6 U5 Part Manufacturer # 5output_half_brick 3input_half_brick 10u,16V 470pF,100V 100u,16V 0.1u,16V 1u,16V .033uF,250V 1u,100V .33uF,250V GRM42-2X5R106K16 (Murata) GHM1530X7R333K250 (Murata) GRM44-1X7R105K250AL (Murata) GHM1545X7R334K250 (Murata) Foot Print CON\5OUTPUT_HALF_BRICK CON\3INPUT_HALF_BRICK SM/C_1210_GRM SM/C_0805 EEJL1CD476R SM/C_0805 SM/C_0805 SM/C_2220 SM/C_2220 SM/C_2220 1u, 16V SM/C_0805 2.2u, 16V 82p 220p, 16V 22n, 16V NA 82pF 680pF 4.7nF 1nF 22nF LS4448 MBR2080CT MURD320 ZM4742A 1N5819HW B140T CMOSH-3 LQH4N102K04 PA1494.532 SUM85N15-19 FZT853 10 0 49.9k 500 5000 TBD 39.2k 2.2 10k 383 280k 499k 2k 8.25k 1.1k 2.2k 3.74k 30.1k NA 80.6k 22.1k 9.1k 768 121 PA0389 P8208T PE-68386 SC4905 SC1301A SC4431 MOCD207 SM/C_0805 SM/C_0805 SM/C_0805 SM/C_0805 SM/C_0805 SM/C_0805 SM/C_0805 SM/C_0805 SM/C_0805 SM/C_0805 SM/DO213AC DIODE_D2PAK DIODE_DPAK SMB/DO214 SOD123 SM/DO213AC SOD523 SDIP0302 PA1494 D2PAKFET SM/SOT223_BCEC SM/R_0805 SM/R_0805 SM/R_1206 SM/R_1210_MCR SM/R_1210_MCR SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 SM/R_0805 PA0389 P8208T PE-68386 MSOP10 SOT23_5PIN SOT23_5PIN SO-8 ZM4742A (Diodes Inc.) CMOSH-3 (Central Semiconductor) LQH4N102K04 (Murata) FZT853 (Zetex) MRC1-100-5000-F-7 MRC1-100-5001-F-7 PE-68386 (Pulse) SC4905 (Semtech) SC1301A (Semtech) SC4431 (Semtech) MOCD207(Fairchild) 2 www.semtech.com SC4905A/B POWER MANAGEMENT Evaluation Board Gerber Plots Board Layout Assembly Top 2002 Semtech Corp. Board Layout Assembly Bottom 3 www.semtech.com SC4905A/B POWER MANAGEMENT Evaluation Board Gerber Plots Board Layout Top 2002 Semtech Corp. Board Layout Bottom 4 www.semtech.com SC4905A/B POWER MANAGEMENT Evaluation Board Gerber Plots Board Layout INNER1 2002 Semtech Corp. Board Layout INNER2 5 www.semtech.com SC4905A/B POWER MANAGEMENT Vin+ CON2 ON/OFF Vin- 1 2 4 C38 220p, 16V 5 4 3 2 1 D6 ZM4742A 220p, 16V C28 499k R18 C14 1u,100V 1u,100V C13 280k R17 2k R19 R20 8.25k R3 49.9k C16 B R4 500 VDD R14 0 C18 1u, 16V C23 2.2u, 16V REF VDD = 12V VDD 6 7 8 9 10 10u,16V C17 E FZT853 Q1 C 0.1u,16V SC4905 U1 OUT REF FB ILIM GND VDD VFF SYNC DMAX RC 1 D8 8 T2 P8208T 7 3 N = 100 R13 10k R15 2.2 LS4448 R16 383 82p R32 768 C26 2 L1 LQH4N102K04 1 C A D1 LS4448 C D2 LS4448 3 s d MURD320 4 D5 R11 2.2 39.2k R10 g SUM85N15-19 D12 CMOSH-3 D7 4 5000 R7 5000 R6 VDD C1 10u,16V GRM42-2X5R106K16 (Murata) C11 U2 1N5819HW .033uF,250V VDD 3 5 SC1301A C19 1u, 16V 1 2 A M1 6 1 4 2 4T 6T T1 0 4T PA0389 .33uF,250V C15 11 7 1 VDD 2 1 4 C2 470pF,100V R1 10 3 D4 4 3 1u, 16V C20 1u, 16V 1 L2 5 PA1494.532 + + + + + T491X107K016AS C24 10u,16V Vref Secondary Supply 1 2 D9 B140T C U4 R27 A C33 SC4431 82pF C35 30.1k SC4431 U6 4 4.7nF Vref Secondary Supply 1 4 + 0 0.1u,16V R24 3.74k R23 39.2k C9 C3 C4 C5 C6 C7 C8 100u,16V 100u,16V 100u,16V 100u,16V 100u,16V 100u,16V 1u, 16V C21 1u, 16V Secondary Supply D11 CMOSH-3 D14 C27 0 5 5 2 R2 0 R33 121 R9 0 C40 22nF C10 1u,16V R12 TBD R8 TBD R29 80.6k R31 9.1k 9 Vout- Sense- Trim Sense+ Vout+ CON1 8 7 6 5 C34 680pF R30 22.1k C39 1nF SC4905 Isolated non_sync 12V 120W (36V to 72V input voltage) SEMTECH CORPORATION C36 C37 0.1u,16V 22n, 16V R28 NA C29 C30 0.1u,16V 22n, 16V R22 2.2k CMOSH-3 C32 4 6 470pF,100V C12 10 R5 1 T3 R26 NA 1.1k R21 PE-68386 1 3 8 2 CMOSH-3 7 4 3 5 6 MOCD207 U5 D13 C25 4CMOSH-3 D10 MBR2080CT 1 D3 MBR2080CT 3 5 SC1301A C22 1u, 16V U3 REF R25 1.1k C31 NA 3.74k Title Size Sheet 1 of Document Number SC4905 Isolated non_sync 12V 120W (36V to 72V input voltage) Date: Monday, April 22, 2002 1 Rev 1.2 www.semtech.com 6 2002 Semtech Corp.