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L4972A Datasheet(PDF) 9 Page - STMicroelectronics |
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L4972A Datasheet(HTML) 9 Page - STMicroelectronics |
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9 / 22 page  9/22 L4972A PART LIST R1 = 30K Ω R2 = 10K Ω R3 = 15K Ω R4 = 30K Ω R5 = 22 Ω R6 = 4.7K Ω R7 = see table 6 R8 = OPTION R9 = 4.7K Ω * C1 = C2 = 1000mF 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 = STPS5L60 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 6. Note: In the Test and Application Circuit for L4972D are not mounted C2, C14 and R8. Table 7. Suggested Boostrap Capacitors V0 R9 R7 12V 4.7k Ω 6.2k Ω 15V 4.7k Ω 9.1k Ω 18V 4.7k Ω 12 Ω 24V 4.7k Ω 18 Ω Operating Frequency Boostrap Cap.c10 f = 20KHz ≥680nF f = 50KHz ≥470nF f = 100KHz ≥330nF f = 200KHz ≥220nF f = 500KHz ≥100nF |
Similar Part No. - L4972A |
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Similar Description - L4972A |
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