KA3080DM 查看數據表（PDF） - Fairchild Semiconductor

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KA3080DM

3-Phase BLDC Motor Driver

Fairchild Semiconductor 

KA3080/KA3080D/KA3080DM

Application Information (32-SDIPH: Ο , 28-SSOPH: (#))

1. Hall Input

The input signal of the hall sensor requires larger amplitude than 100mVo-p. The operating voltage level of the hall sensor is

from 1.2V ~ VCC1-0.8V.

(15) 1

(17) 3

(19) 5

VCC1

2 (16)

4 (18)

6 (20)

More than 1.7V

More than 100mVo-p

More than 1.3V

2. Output Current Detection

16 (1) VCC2

13 (26) UOUT

14 (27) VOUT

15 (28) WOUT

RS (0.5Ω)

11

(22 Pin)

12

(25 Pin)

The RS (Output current sensing resistor ) is connected to GOUT and Approx. 0.5Ω, It converts motor current to a voltage

which is feedback amplifier.

3. Motor Speed Control (Input Current Limitation)

The maxmum output current is limitted by the ILIM (Current limiting) voltage.

If current limitation is not in use then connect it to VCC1.

The control gain is approx. 0.67A/V as follows.

GML = ∆IO / ∆VLIM = (IO2 − IO1) / (VLIM2 − VLIM1), where VLIM1 = 1.45V → Output current=IO1

VLIM2 = 1.55V → Output current=IO2

11

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