12/17

12

9

1

12

9

1

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

12

8

1

12

8

1

osc

osc

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

The resistor value is calculated according to the

formula:

Rf

=

306

fc

− 17 =

k

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:

Cf

=

80.5

− 4.7fc

fc

= nF where fc = kHz

GS-D200/GS-D200S