AM7232

Motor Driver ICs

http://www.amtek-semi.com

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Specifications subject to change without notice

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5. Minimum Speed Control:

When the IC using as minimum speed control. The minimum speed is setting by RMI pin, and

minimum speed can be adjusted by RM1 and RM2 ratio. The relation is shown as the Fig. 3

below. When not need this feature, set the RMI pin connected to Vref, avoid noise interference..

PWM +RMI type control

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10%

20%

30%

40%

50%

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70%

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100%

PWM Duty (%)

PWM

PWM+RMI_20%

PWM+RMI_10%

PWM+RMI_30%

Fig.3

6. Slope Low duty control:

When the IC using as Slope low duty control. The low duty control is setting by VH pin, and low

duty control can be adjusted by RH1 and RH2 ratio. Typical setting is 0.75VREF, The relation is

shown as the Fig. 4 below.

Fig.4