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AN1625 APPLICATION NOTE

Figure 38. PractiSPIN ST7 Evaluation Board

4.2 EVAL6235N

An evaluation board has been produced to help the evaluation of the device in PowerDIP package. It imple-

ments a typical application with several added components. Figure 40 shows the electrical schematic of the

board; in the table below the part list is reported.

The Evaluation Board provides external connectors for the supply voltage, an external 5 V reference for the logic

inputs, three outputs for the motor and a 34-pin connector to control the main functions of the board through an

external

µC board.

Running the evaluation board in stand-alone mode, instead, four switches (S1) allow enabling the device, set-

ting the direction of the rotation, braking the motor, choosing to run in torque or speed mode. R17 and R22 set

CN1, CN2

2-poles connector

JP1, JP2

2-pin jumper

CN3

3-poles connector

R1

700

Ω 0.6W resistor

CN4

34-poles connector

R2,R3,R4,R7,R8,R9

10k

Ω resistor

C1

220nF/100V Ceramic or Polyester capacitor

R5

100

Ω resistor

C2

220nF/100V Ceramic or Polyester capacitor

R15,R6

1k

Ω resistor

C3

100µF/63V capacitor

R11,R10

100k

Ω trimmer

C4

10nF/100V Ceramic capacitor

R12,R13,R14

1

Ω 1% resistor

C5

10µF/16V Capacitor

R16

1M

Ω resistor

C6

33nF Capacitor

R17

20k

Ω resistor

C7

1nF Capacitor

R18

4.7k

Ω resistor

C8

820pF Capacitor

R19

5.6k

Ω resistor

C9

10nF Capacitor

R20

2.2k

Ω resistor

C10

220nF Capacitor

R21

1.8k

Ω resistor

C11

68nF Capacitor

R22

5k

Ω trimmer

C12

100nF Capacitor

S1

quad switch

D1, D2

1N4148 Diode

U1

L6235N

D3

BZX79C5V1 5.1V Zener Diode

U2

LM358