GSD200 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

GSD200

2/2.5A BIPOLAR STEPPER MOTOR DRIVE MODULES

STMicroelectronics 

GS-D200/GS-D200S

Figure 14: GS-D200 and GS-D200S Phase Current Programming

12

9

1

12

9

1

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 Vss (pin 12, see fig. 15).

The resistor value is calculated according to the

formula:

Rf

=

306

fc − 17

=

kΩ

where fc = kHz Rf≥ 18kΩ

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

=

80.5

− 4.7fc

fc

=

nF

where fc = kHz

Figure 15: Chopper Frequency Programming

12

osc 8

1

12/17

fC < 17 KHz

12

osc

8

1

fC > 17 KHz

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