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