GS-D200S SGS-Thomson-Microelectronics, GS-D200S Datasheet - Page 12

• Manufacturer Part Number: GS-D200S
• Description: 2 / 2.5 A BIPOLAR STEPPER MOTOR DRIVE MODULE
• Manufacturer: SGS-Thomson-Microelectronics

Figure 14: GS-D200 and GS-D200S Phase Current Programming
GS-D200/GS-D200S
Chopper Frequency Programming
The chopper frequency is internally set to 17kHz,
and it can be changed by addition of external
components as follows. To increase the chopper
frequency a resistor must be connected between
Oscillator (pin 8) and V
The resistor value is calculated according to the
formula:
Figure 15: Chopper Frequency Programming
12/17
osc
9
8
ss
(pin 12, see fig. 15).
12
f
1
C
< 17 KHz
12
1
Rf
To decrease the chopper frequency a capacitor
must be connected between Oscillator (pin 8) and
Gnd1 (pin 1). The capacitor value is calculated
according to the formula:
Cf
fc
80.5
306
17
fc
4.7fc
k
osc
nF where fc
8
where fc
9
f
C
> 17 KHz
12
12
1
1
kHz Rf 18k
kHz