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SLA7026 Arkusz danych(PDF) 5 Page - Sanken electric |
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SLA7026 Arkusz danych(HTML) 5 Page - Sanken electric |
5 / 7 page 24 SLA7027MU/SLA7024M/SLA7026M 2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation) SLA7027MU/SLA7024M/SLA7026M Fig. 6 Chopper frequency vs. Motor coil resistance 60 50 40 30 20 10 0 0 2 4 6 8 10 12 14 16 15 20 25 30 35 40 Motor coil resistance Rm ( Ω) VC C =24V VCC =36V TOFF =12 s RS =1 Ω Lm =1~3ms Rm = = r3 C1 r4 C2 47k Ω 500pF µ sDetermining the chopper frequency Determining TOFF The SLA7000M series are self-excited choppers. The chopping OFF time TOFF is fixed by r3/C1 and r4/C2 connected to terminal Td. TOFF can be calculated using the following formula: The circuit constants and the TOFF value shown below are rec- ommended. TOFF = 12 µs at r3=47kΩ, C1=500pF, Vb=5V sChopper frequency vs. Supply voltage 0 VCC (V) 50 40 30 20 10 0 10 20 30 40 50 Motor : 23LM-C202 IO = 0.8A at VCC=24V RS=1 Ω sChopper frequency vs. Output current 0 IO (A) 50 40 30 20 10 0 0.2 0.4 0.6 0.8 1.0 Motor : 23LM-C202 VCC=24V RS=1 Ω TOFF ≅−r3 • C1 n (1− = −r4 • C2 n (1− ) rr 2 Vb 2 Vb |
Podobny numer części - SLA7026 |
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Podobny opis - SLA7026 |
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