NJM3717FM2 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJM3717FM2

STEPPER MOTOR DRIVER

Japan Radio Corporation  

200 mA/div

1 ms/div

21

NJM3717

0

100µs/div

Figure 4. Motor current (I ),

M

Vertical : 200 mA/div, Horizontal: 1

ms/div, expanded part 100 µs/div

3

RS

Motor Current

1

2

3

Fast Current Decay

Slow Current Decay

Time

Figure 5. Output stage with current

paths for fast and slow current decay

Phase shift here

gives fast

current decay

I 0A

I 1A

Ph A

Ph B

I 0B

I 1B

I MA

100%

60%

–20%

–60%

–100%

I MB

100%

60%

20%

–60%

–100%

Full step position

Half step position

Stand by mode

at 20 %

Half step mode at 100 %

Phase shift here

gives slow

current decay

Figure 6. Principal operating sequence

Full step mode at 60 %

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