L6228PD datasheet(4/26 Pages) STMICROELECTRONICS

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L6228

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PIN DESCRIPTION

PACKAGE

Name

Type

Function

SO24/

PowerDIP24

PowerSO36

PIN #

CLOCK

Logic Input

Step Clock input. The state machine makes one step on

each rising edge.

CW/CCW

Logic Input

Selects the direction of the rotation. HIGH logic level sets

clockwise direction, whereas LOW logic level sets

counterclockwise direction.

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

SENSEA

Power Supply

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

Ground through a sensing power resistor.

413

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.

OUT1A

Power Output

Bridge A Output 1.

6, 7,

18, 19

1, 18,

19, 36

GND

Ground terminals. In PowerDIP24 and SO24 packages,

these pins are also used for heat dissipation toward the

PCB. On PowerSO36 package the slug is connected to

these pins.

OUT1B

Power Output

Bridge B Output 1.

924

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.

SENSEB

Power Supply

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

Ground through a sensing power resistor.

VREFB

Analog Input

Bridge B Current Controller Reference Voltage.

Do not leave this pin open or connected to GND.

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 has to be connected to GND or +5V.

CONTROL

Logic Input

Decay Mode Selector. HIGH logic level sets SLOW

DECAY Mode. LOW logic level sets FAST DECAY Mode.

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

Logic Input (6)

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 over current protection.

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

resistor.

VBOOT

Supply

Voltage

Bootstrap Voltage needed for driving the upper Power

MOSFETs of both Bridge A and Bridge B.

OUT2B

Power Output

Bridge B Output 2.

VSB

Power Supply

Bridge B Power Supply Voltage. It must be connected to

the Supply Voltage together with pin VSA

VSA

Power Supply

Bridge A Power Supply Voltage. It must be connected to

the Supply Voltage together with pin VSB

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