L8229

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:
  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.
Mixed Decay.
Micro stepping function.
BCD5 technology (No Charge Pump required).
Supply Range from 8V to 38V.
IOUT up to 1.2A (1.5A peak).
RDSon= 0.75 (typ) for each switch.
Input logic level compatible with 3.3V or 5V control signals.
Packages:  PwSSO24.


Pinout




Specifications

Symbol	Parameter	Value	Unit
Vs	Supply voltage (including ripple).	40	V
Vcc	Logic and Low voltage analog supply voltage	7	V
Ipeak	Motor Driver Output Peak Current (see Note 3).	1.5	A
Vref	Vref input voltage.	7.5	V
Vsense	Vsense output voltage.	2	V
Vin	Logic input voltage.	-0.3 to +7	V
Tj	Junction Temperature.	170	°C
Tstg	Storage Temperature.	-25 to 150	°C

Note 3: This peak current is intended as start up current for max 1 second with D.C. 10%


Description

L8229 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 L8229 in different configurations.

1) The first configuration of the L8229 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 of the L8229 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 and 4) The third and fourth configurations of the L8229 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.