Preliminary Data

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

September 2006

Rev 5

1/42

1

L8229

Dual DMOS full bridge stepper/DC motor driver

Features

– Dual Full Bridge for one bipolar Stepping motor.

– Dual or single DC motor driver.

one of the following functionalities:

– Pin to pin compatible with ST L6219 or

– Stepping motor direct control with 8 current

levels or

– Driver parameters control by means of

Serial Port.

control signals.

Description

This IC is designed to be very flexible in driving

Stepping or DC motors.

By connecting to Vcc or to Gnd two program pins

(pin 7 and 18) the user has the possibility to set

up the device in different configurations.

1.

The first configuration is an identical

application of ST L6219 but with increased

current. In this configuration L8229 provides

a continuous current of the output stage up

to 1.2A (1.5A peak).

2.

The second configuration allows a

functionality similar to previous one but with

the possibility of choosing 8 different current

levels to perform a more accurate stepping

functionality. This is achieved by multiplexing

the input pins dedicated to set the level of the

current. Additionally the user can set the

mixed mode decay for current recirculation.

3,4. The third and fourth configurations are

intended to provide a very flexible

programming for several parameters useful

to drive different kind of Stepping and DC

motors. This is achieved by means of a serial

port interface that allows the user to

configure the following parameters:

a)

Current levels (32 values for each

bridge).

b)

Current direction.

c)

Type of decay for Stepping motors

(Mix/Slow) or for DC motors (Fast/Slow).

d)

Vref input (Ext/Int).

e)

Vref divider (:5/:10).

f)

Blanking time (4 values).

g)

Oscillator freq divider (4 values).

h)

Off time (32 values).

i)

Fast decay time (16 values).

j)

Syncronous rectification.

The functionalities of the two configurations are

identical except that the internal bit address (first

bit of SPI words) can be programmed to be 1 or 0:

this enables two different L8229 to share a

common serial bus.

Order code

PwSSO24

Part number

Package

Packing

L8229

PwSSO24

Tube

www.st.com

Obsolete

Product(s)

- Obsolete

Product(s)