L8229 Datasheet, PDF (1/42 Pages) STMicroelectronics – Dual DMOS full bridge stepper/DC motor driver

L8229
Dual DMOS full bridge stepper/DC motor driver
Preliminary Data
Features
■ Flexible Motor Driver configurations:
– Dual Full Bridge for one bipolar Stepping motor.
– Dual or single DC motor driver.
■ Programmable by two input pins to achieve
one of the following functionalities:
PwSSO24
– Pin to pin compatible with ST L6219 or
– Stepping motor direct control with 8 current
levels or
) _{– Driver parameters control by means of}
t(s ^{Serial Port.}
c _{■ Mixed Decay.}
du ^{■ Micro stepping function.}
ro ^{■ BCD5 technology (No Charge Pump required).}
P _{■ Supply Range from 8V to 38V.}
te ^{■ I}OUT ^{up to 1.2A (1.5A peak).}
le ■ R_DSon= 0.85Ω (typ) for each switch.
o _{■ Input logic level compatible with 3.3V or 5V}
bs ^{control signals.}
O ^{■ Package: PwSSO24.}
) ^- _Description
t(s This IC is designed to be very flexible in driving
c _{Stepping or DC motors.}
du By connecting to Vcc or to Gnd two program pins
ro ^{(pin 7 and 18) the user has the possibility to set}
up the device in different configurations.
P _{1. The first configuration is an identical}
te _{application of ST L6219 but with increased}
le current. In this configuration L8229 provides
oa continuous current of the output stage up
s_{to 1.2A (1.5A peak).}
b_{2. The second configuration allows a}
O _{functionality similar to previous one but with}
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
the possibility of choosing 8 different current
common serial bus.
Order code
Part number
L8229
Package
PwSSO24
Packing
Tube
September 2006
Rev 5
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
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