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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L4974A датащи(PDF) 10 Page - STMicroelectronics |
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L4974A датащи(HTML) 10 Page - STMicroelectronics |
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10 / 22 page  PART LIST R1 = 30K Ω R2 = 10K Ω R3 = 15K Ω R4 = 30K Ω R5 =22 Ω R6 = 4.7K Ω R7 = see table A R8 = OPTION R9 = 4.7K Ω *C1 =C2 = 1000 µF 63V EYF (ROE) C3 =C4 =C5 =C6 = 2,2 µF 50V C7 = 390pF Film C8 = 22nF MKT 1837 (ERO) C9 = 2.7nF KP 1830 (ERO) C10 = 0.33 µF Film C11 = 1nF ** C12 =C13 =C14 = 100 µF 40V EKR (ROE) C15 =1 µF Film D1 = SB 560 (OR EQUIVALENT) L1 = 150 µH core 58310 MAGNETICS 45 TURNS 0.91mm (AWG 19) COGEMA 949181 * 2 capacitors in parallel to increase input RMS current capability. * * 3 capacitors in parallel to reduce total output ESR. Table A V0 R9 R7 12V 15V 18V 24V 4.7k Ω 4.7k Ω 4.7k Ω 4.7k Ω 6.2kW 9.1k Ω 12 Ω 18 Ω Table B SUGGESTED BOOSTRAP CAPACITORS Operatin g F requency Boo strap Cap.c10 f = 20KHz ≥680nF f = 50KHz ≥470nF f = 100KHz ≥330nF f = 200KHz ≥220nF f = 500KHz ≥100nF Figure 6a : Component Layout of fig.5 (1 : 1 scale). Evaluation Board Available L4974A 10/22 |
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