L6258_07 Datasheet, PDF (25/32 Pages) STMicroelectronics – PWM controlled high current DMOS universal motor driver

L6258
Figure 11. Typical application circuit
Application information
10nF
100nF
VS
1nF
VCP1
10
VCP2
11
VBOOT
12
VS
TRI_CAP
13,31
7
PH1
I0_1
I1_1
I2_1
I3_1
PH2
I0_2
I1_2
I2_2
I3_2
DISABLE
2
4
3
32
33
17
15
16
23
22
6
29
EA_IN1
L6258
SOP36
PACKAGE
30
25
EA_OUT1
EA_IN2
0.33
21
OUT2B
20
SENSE2
OUT2A
14
SENSE1
35
0.33
34
OUT1B
5
OUT1A
9
GND
1,36
18,19
8
27
PWR_GND
V_DD
SIG_GND
28
26
24
EA_OUT2
VREF1
VREF2
STEPPER
M
MOTOR
12mH 10Ω
V_DD(5V)
VREF
1M _820pF
R1 1M
1M _820pF
R2 1M
D97IN626E
4.2
Motor selection
Some stepper motor have such high core losses that they are not suitable for switch mode
current regulation. Furthermore, some stepper motors are not designed for continuous
operating at maximum current. Since the circuit can drive a constant current through the
motor, its temperature might exceed, both at low and high speed operation.
4.3
Unused inputs
Unused inputs should be connected to the proper voltage levels in order to get the highest
noise immunity.
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