LV8044LP_11 Datasheet, PDF (13/26 Pages) Sanyo Semicon Device – 6-channel Motor Driver IC

LV8044LP,LV8044LQ
Channels 1 and 2 Driver Circuit (Microstep drive stepping mode driver)
STEP1 Pin Function
ST
Low
High
Input
STEP1
*
High
Operating mode
Standby mode
Excitation step feed
Excitation step hold
Excitation Mode Setting (D0 = 0, D1 = 0, D2 = 0)
D3
D4
Excitation mode
Initial position
1ch
2ch
0
0
2 phase excitation
100%
-100%
1
0
1-2 phase excitation (full torque)
100%
0%
0
1
1-2 phase excitation
100%
0%
1
1
4W1-2 phase excitation
100%
0%
The initial state at power on is the initial position for each excitation mode when the counter is reset.
Reference Voltage Setting Serial Data: (D0 = 0, D1 = 0, D2 = 0)
D5
D6
0
0
1
0
0
1
1
1
Current setting reference voltage (When microstep is 100%)
0.2V
0.134V
0.1V
0.066V
The output current setting reference voltage can be switched between four levels with the serial data.
This setting is useful for saving power in the motor powered hold state.
Calculating the Set Current
Since the reference voltage can be modified (0.2, 0.134, 0.1, and 0.66V) with the serial data, the output current can be
set with the reference voltage and the resistor RF connected between the RF pin and ground.
IOUT = (<reference voltage> × <set current ratio>)/<RF resistor value>
Example: If the reference voltage is 0.2 V, the set current ratio is 100%, and the RF resistor value is 1Ω, then the output
current will be that shown below.
IOUT = 0.2V × 100%/1Ω = 200mA
No.A0438-13/26