전자부품 데이터시트 검색엔진 |
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SI786CG 데이터시트(PDF) 10 Page - Vishay Siliconix |
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SI786CG 데이터시트(HTML) 10 Page - Vishay Siliconix |
10 / 14 page Si786 Vishay Siliconix www.vishay.com 10 Document Number: 70189 S-40807—Rev. J, 26-Apr-04 SCHEMATIC DRAWINGS COMPARATOR SUPPLY INPUT CS3 FB3 SS5 Si786 DH5 ON3 LX3 D1 BST3 D2 VH Q2 DL5 V+ VL 17 16 18 22 25 27 26 23 21 15 19 24 1 28 Q1 FB5 GND PGND REF DL3 SYNC BST5 SHDN ON5 SS3 LX5 DH3 CS5 8 4 6 14 3 13 12 2 20 7 5 11 9 10 N3 D1 D1FS4 (Note 1) N3 D1 D1FS4 (Note 1) INPUT 5.5 V to 30 V 3.3 V at 3 A C7 150 mF C12 150 mF R1 25 mW L1 10 mH N1 N2 D2A 1N4148 D2B 1N4148 C5 0.1 mF C4 0.1 mF C1 22 mF C10 22 mF 10 mF 5 V at 5 mA 5 V at 3 A C6 330 mF R2 25 mW L2 10 mH C9 0.01 mF C8 0.01 mF 3.3 V ON/OFF 5 V ON/OFF SHUTDOWN OSC SYNC IN OUT IN OUT COMPARATOR 1 COMPARATOR 2 3.3 V at 5 mA C3 1 mF FIGURE 1. Si786 Application Circuit Note 1: Use short, Kelvin-connected PC board traces placed very close to one another. 0.1 mF 100 W FIGURE 2. Si786 Block Diagram 5-V LDO Linear Regulator 3.3-V Reference ON 300 kHz/200 kHz Oscillator ON 3.3-V PWM Controller (See Figure 3) 5-V PWM Controller (See Figure 3) STANDBY FB3 CS3 BST3 DH3 LX3 DL3 SS3 ON3 ON5 VH Q1 Q2 PGND FB5 CS5 BST5 DH5 LX5 DL5 SS5 V+ VL REF SHDN SYNC D1 1.65 V D2 1.65 V 4.5 V 4 V 2.8 V ON ON |
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