AP1025BEN Datasheet, PDF (8/21 Pages) Asahi Kasei Microsystems – 45V Single Stepper Motor Driver IC

[AP1025BEN]
10. Functional Description
10.1 Input terminal and protection circuit
 Common description (Parallel input mode and Clock-in input mode)
Table 2. Internal circuit operation by the ENABLE(EN) signal
EN pin
UVLO
TSD
Reference Voltage Circuit
H-Bridge
H
L
L
H
ON
ON
Output
Hi-Z
H
-
OFF
Hi-Z
L
-
-
OFF
Hi-Z
Note 10. UVLO, TSD and Reference Voltage Circuit show internal status. “-“ is Don’t Care.
Table 3. Selection of the chopper frequency by the SYN signal
SYN pin
FS pin
OSC pin
PWM chopper frequency
L
L
Output
25kHz(typ)
H
50kHz(typ)
H
-
Input
External frequency
Note 11. Do not change input level of the SYN and FS pin during operation. “-“ is Don’t Care.
Table 4. Selection of the chopper frequency by the INSEL signal
INSEL
Input Mode
Parallel input mode.
L
H-Bridge is controlled by input logic.
Excitation mode : 2phase, 1-2phase(1/2step), W1-2phase(1/4step)
Clock-in input mode.
H
H-Bridge is controlled by the count number of the clock.
Excitation mode : 2phase, 1-2phase(1/2step), W1-2phase(1/4step), 4W1-2phase(1/16step)
Note 12. Do not change input level of the INSEL terminal during operation.
015000434-E-00
-8-
2015/01