DocID018710 Rev 3

7/34

L6208Q

Pin connection

34

15, 16

Power supply

Bridge B source pin. This pin must be connected to power ground

through a sensing power resistor.

17

Analog input

Bridge B current controller reference voltage. Do not leave this pin

open or connected to GND.

18

HALF/FULL

Logic input

Step mode selector. High logic level sets half step mode, low logic

level sets full step mode. If not used, it must be connected to GND or

+5 V.

19

CONTROL

Logic input

Decay mode selector. High logic level sets slow decay mode. Low

logic level sets fast decay mode. If not used, it must be connected to

GND or +5 V.

20

EN

Chip enable. Low logic level switches off all power MOSFETs of both

bridge A and bridge B. This pin is also connected to the collector of

the overcurrent and thermal protection to implement overcurrent

protection. If not used, it must be connected to +5 V through

a resistor.

21

VBOOT

Supply voltage

Bootstrap voltage needed for driving the upper power MOSFETs of

both bridge A and bridge B.

22, 23

Power output

Bridge B output 2.

34, 35

Power supply

Bridge A power supply voltage. It must be connected to the supply

26, 27

Power supply

Bridge B power supply voltage. It must be connected to the supply

38, 39

Power Output Bridge A output 2.

40

VCP

Output

Charge pump oscillator output.

41

RESET

Logic Input

Reset pin. Low logic level restores the home state (state 1) on the

phase sequence generator state machine. If not used, it must be

connected to +5 V.

42

Analog Input

Bridge A current controller reference voltage. Do not leave this pin

open or connected to GND.

1. Also connected at the output drain of the overcurrent and thermal protection MOSFET. Therefore, it must be driven putting

in series a resistor with a value in the range of 2.2 k

 - 180 k, recommended 100 k.

Table 3. Pin description (continued)

Pin

Name

Type

Function