Datenblatt-Suchmaschine für elektronische Bauteile |
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SLA7021M Datenblatt(PDF) 5 Page - Sanken electric |
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SLA7021M Datenblatt(HTML) 5 Page - Sanken electric |
5 / 10 page 18 SLA7024M, SLA7026M, SLA7027MU, SLA7022MU, SLA7029M, SMA7022MU, SMA7029M, SLA7020M, SLA7021M and SDK03M Application Note Fig. 6 Circuit for fixing the coil current Fig. 7 Circuit for fixing the coil current Fig. 8 and 9 show the graphs of equations q and w , respectively. Fig. 8 Output current Io vs. Current detection resistor Rs Fig. 9 Output current lOPD vs. Variable current resistor rx NOTE: Ringing noise is produced in the current detection resistor Rs when the MOSFET is switched ON and OFF through chopping. This noise is also generated in feedback signals from Rs which may therefore causes the comparator to malfunction. To prevent chopping malfunctions, r5(r6) and C3(C4) are added in order to act as noise filter. However, when the values of these constants are increased, the response from Rs to the comparator becomes slow. Hence, the value of the output current lo is higher to some extent than the computed value. SLA7024M SLA7026M SLA7027MU C3 r2 r1 r6 r5 Vb(5V) 9,(10) 3,(14) rX Tr Power down signal SDK03M RS C3 r2 r1 r6 r5 Vb(5V) 10 3 rX Tr Power down signal 13 15 4 3 2 1 0 01234 Current detection resistor RS ( Ω) SLA7024M, SLA7026M, SLA7029M, SLA7027MU, SLA7022MU, SLA7020M, SLA7021M, SMA7029M, SMA7022MU, SDK03M IO= r1+r2 RS r1=510 Ω r2=100 Ω rx= ∞ Vb=5V r2 · Vb 2 1.5 1 0.5 00 2.0 4.0 6.0 8.00 Variable current resistor rX ( Ω) SLA7024M, SLA7026M, SLA7029M, SLA7027MU, SLA7022MU, SLA7020M, SLA7021M, SMA7029M, SMA7022MU, SDK03M 1000 1200 RS =0.5 Ω RS =0.8 Ω RS =1 Ω IOPD= 1+ RS r1=510 Ω r2=100 Ω Vb=5V 1 · Vb r1(r2+rX) r2 · rX |
Ähnliche Teilenummer - SLA7021M |
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Ähnliche Beschreibung - SLA7021M |
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