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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L6986I 데이터시트(PDF) 43 Page - STMicroelectronics |
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L6986I 데이터시트(HTML) 43 Page - STMicroelectronics |
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43 / 60 page  8 Application board The reference evaluation board schematic is shown in the figure below. Figure 51. STEVAL-A6986IV1 evaluation board schematic optional circuitry for improved load regulation C21 TP6 VOUT1 U2 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 R12 R13 R8 R3 R1 C20 C12 TP7 GND1 R18 R16 Q1 D1 2 1 L4 U3 C17 C4 C18 VISO- GNDiso TP11 GND2 C15 GND2 U1 RST 1 VCC 2 SS/INH 3 SYNCH 4 FSW 5 MLF 6 COMP 7 DELAY 8 FB 9 SGND 10 PGND 11 PGND 12 LX 13 LX 14 VIN 15 VBIAS 16 EP 17 GND1 C16 TP4 GNDpri C11 TP10 VISO- R11 L3 VISO+ R2 GND1 TP12 VOUT2 TP5 VIN C19 C13 D3 EMI FIlter R17 GND2 C5 GND1 TP8 VISO+ TP9 GNDiso Figure 52. STEVAL-L6986IV1 evaluation board schematic optional circuitry for improved load regulation TP6 VOUT1 GND1 R12 R13 R8 R3 R1 C20 C12 TP7 GND1 C21 R16 Q1 D1 2 1 L4 U3 C17 C4 C18 VISO- GNDiso TP11 GND2 C15 GND2 U1 RST 1 VCC 2 SS/INH 3 SYNCH 4 FSW 5 MLF 6 COMP 7 DELAY 8 FB 9 SGND 10 PGND 11 PGND 12 LX 13 LX 14 VIN 15 VBIAS 16 EP 17 GND1 C16 TP4 GNDpri C11 TP10 VISO- R11 L3 VISO+ R2 R18 TP12 VOUT2 TP5 VIN C19 C13 R17 D3 EMI FIlters U4 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 GND2 C5 GND1 TP8 VISO+ TP9 GNDiso Figure 53. STEVAL-A6986IV2 evaluation board schematic TP6 VOUT1 U2 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 R12 R13 R18 R8 R3 R1 C20 C21 TP7 GND1 R16 Q1 D1 2 1 L4 U3 C17 C4 C18 GNDiso TP11 GND2 C15 GND2 U1 RST 1 VCC 2 SS/INH 3 SYNCH 4 FSW 5 MLF 6 COMP 7 DELAY 8 FB 9 SGND 10 PGND 11 PGND 12 LX 13 LX 14 VIN 15 VBIAS 16 EP 17 GND1 C16 TP4 GNDpri C11 R11 L3 VISO+ R2 GND1 TP12 VOUT2 TP5 VIN C19 C13 R17 EMI FIlter GND2 C5 GND1 TP8 VISO+ TP9 GNDiso optional circuitry for improved load regulation The additional input filter (C20, L4, C18, L3, C19) limits the conducted emission on the power supply. In case the filter is not necessary or should be by-passed for any test, a 0 Ω resistor can be placed at R16. The evaluation board of the iso-buck is available with three different assemblies, mainly differentiated by the isolation of the transformer (3.3 kV / 1.5 kV) and the isolated output options (single or dual voltage), as summarized in the following table. L6986I Application board DS13647 - Rev 2 page 43/60 |
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