KA3084D 데이터 시트보기 (PDF) - Fairchild Semiconductor

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KA3084D

2-Phase BLDC Motor Driver

Fairchild Semiconductor 

ICTL

IO

AT

KA3084D

Figure 2.

IO

IOmax

AT

ICOmax

ICTL

Figure 3.

3. VOLTAGE CONTROL

Even though KA3084D command uses Ic to control the magnitude of IO, it can also use voltage. KA3084D mainly uses volt-

age control and has option to use current control.

VCTL

V/I

Converter

ICTL

IO

AT

Figure 4 shows the principle of the voltage control.

Figure 4.

The VCTL is the motor speed control voltage, and the ICTL is converted to current through the V / I converter.

Figure 5 shows the graph of VCTL vs. IO.

IO

IOmax

AT

GM

0.48 × VREG (TYP)

Figure 5.

10

VCTL

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