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SMA7022MU 数据表(PDF) 5 Page - Sanken electric |
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SMA7022MU 数据表(HTML) 5 Page - Sanken electric |
5 / 7 page 9 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation) sDetermining the chopper frequency Determining TOFF The SLA7000M and SMA7000M series are self-excited chop- pers. 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 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) VCC =2 4V VCC =36V TOFF =12 s RS =1 Ω Lm =1~3ms Rm = = r3 C1 r4 C2 47k Ω 500pF µ Fig. 6 Chopper frequency vs. Motor coil resistance 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 |
类似零件编号 - SMA7022MU |
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类似说明 - SMA7022MU |
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