L6219DSA STMicroelectronics, L6219DSA Datasheet - Page 9

• Manufacturer Part Number: L6219DSA
• Description: IC STEPPER MOTOR DRIVER SO-24
• Manufacturer: STMicroelectronics
• Type: Driverr

Specifications of L6219DSA

• Applications: DC Motor Driver, Stepper Motor Driver
• Number Of Outputs: 2/1
• Current - Output: ±750mA
• Voltage - Load: 10 V ~ 46 V
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 10 V to 46 V
• Supply Current: 0.01 A
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6219DSA
2
2.1
2.2
2.3
Functional description
The circuit is intended to drive both windings of a bipolar stepper motor.
The peak current control is generated through switch mode regulation.There is a choice of
three different current levels with the two logic inputs I
winding 2.
The current can also be switched off completely.
Input logic (I
The current level in the motor winding is selected with these inputs. (See
the logic inputs is left open, the circuit will treat it has a high level input.
Table 6.
Phase
This input determines the direction of current flow in the windings, depending on the motor
connections. The signal is fed through a schmidt-trigger for noise immunity, and through a
time delay in order to guarantee that no short-circuit occurs in the output stage during
phase-shift.High level on the phase input causes the motor current flow from out A through
the winding to out B.
Current sensor
This part contains a current sensing resistor (R
comparators. Only one comparator is active at a time. It is activated by the input logic
according to the current level chosen with signals I
the sensing resistor R
becomes higher than the reference voltage on the other comparator input, the comparator
goes high, which triggers the pulse generator.
The max peak current I
I
H
H
L
L
0
Current levels
0
and I
S
. When the current has increased so that the voltage across R
max
I
H
H
L
L
1
can be defined by:
1
)
No current
Low current 1/3 I
Medium current 2/3 I
Maximum current I
I
max
=
-------------
10R
V
S
ref
), a low pass filter (R
o
s
O
and I
O
max
01
O
max
max
- I
1
Current level
. The motor current flows through
11
for winding 1 and I
Functional description
C
, C
Figure
C
) and three
02
4). If any of
- I
12
S
for
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