GS-D200 datasheet(12/17 Pages) STMICROELECTRONICS

Part #	GS-D200

Description	2/2.5A BIPOLAR STEPPER MOTOR DRIVE MODULES

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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12 / 17 page

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

osc

fC < 17 KHz

fC >17KHz

Figure 15: Chopper Frequency Programming

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:

306

− 17 =

Ω

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:

80.5

− 4.7fc

= nF where fc = kHz

GS-D200/GS-D200S

GS-D200 Datasheet(PDF) 12 Page - STMicroelectronics