L6228Q(2008) Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

L6228Q
(Rev.:2008)

DMOS driver for bipolar stepper motor

STMicroelectronics 

Pin connection

L6228Q

Table 4.

N°

Pin description

Pin

Type

Function

1, 21

GND

GND Ground terminals.

9

OUT1B Power Output Bridge B Output 1.

11

RCB

RC Pin

RC Network Pin. A parallel RC network connected between this pin and

ground sets the Current Controller OFF-Time of the Bridge B.

12

SENSEB

Power

Supply

Bridge B Source Pin. This pin must be connected to Power Ground through a

sensing power resistor.

13

VREFB

Analog Input

Bridge B Current Controller Reference Voltage.

Do not leave this pin open or connected to GND.

Step Mode Selector. HIGH logic level sets HALF STEP Mode, LOW logic

14 HALF/FULL Logic Input level sets FULL STEP Mode.

If not used, it has to be connected to GND or +5 V.

Decay Mode Selector. HIGH logic level sets SLOW DECAY Mode. LOW logic

15 CONTROL Logic Input level sets FAST DECAY Mode.

If not used, it has to be connected to GND or +5 V.

Chip Enable. LOW logic level switches OFF all Power MOSFETs of both

16

EN

Logic Input Bridge A and Bridge B. This pin is also connected to the collector of the

(1)

Overcurrent and Thermal Protection to implement over current protection.

If not used, it has to be connected to +5 V through a resistor.

17

VBOOT

Supply

Voltage

Bootstrap Voltage needed for driving the upper Power MOSFETs of both

Bridge A and Bridge B.

19

OUT2B Power Output Bridge B Output 2.

20

VSB

Power

Supply

Bridge B Power Supply Voltage. It must be connected to the Supply Voltage

together with pin VSA

22

VSA

Power

Supply

Bridge A Power Supply Voltage. It must be connected to the Supply Voltage

together with pin VSB

23

OUT2A Power Output Bridge A Output 2.

24

VCP

Output Charge Pump Oscillator Output.

Reset Pin. LOW logic level restores the Home State (State 1) on the Phase

25

RESET Logic Input Sequence Generator State Machine.

If not used, it has to be connected to +5 V.

26

VREFA

Analog Input

Bridge A Current Controller Reference Voltage.

Do not leave this pin open or connected to GND.

27

CLOCK Logic Input Step Clock input. The state machine makes one step on each rising edge.

Selects the direction of the rotation. HIGH logic level sets clockwise direction,

28 CW/CCW Logic Input whereas LOW logic level sets counterclockwise direction.

If not used, it has to be connected to GND or +5 V.

29

SENSEA

Power

Supply

Bridge A Source Pin. This pin must be connected to Power Ground through a

sensing power resistor.

30

RCA

RC Pin

RC Network Pin. A parallel RC network connected between this pin and

ground sets the Current Controller OFF-Time of the Bridge A.

31

OUT1A Power Output Bridge A Output 1.

1. Also connected at the output drain of the Over current and Thermal protection MOSFET. Therefore, it has to be driven

putting in series a resistor with a value in the range of 2.2 kΩ - 180 kΩ, recommended 100kΩ

6/32

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