L6208PD View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
L6208PD Datasheet PDF : 35 Pages
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Application information
8
Application information
L6208
A typical bipolar stepper motor driver application using the L6208 device is shown in
Figure 25. Typical component values for the application are shown in Table 7. A high quality
ceramic capacitor in the range of 100 to 200 nF should be placed between the power pins
(VSA and VSB) and ground near the L6208 to improve the high frequency filtering on the
power supply and reduce high frequency transients generated by the switching. The
capacitor connected from the EN input to ground sets the shutdown time when an
overcurrent is detected (see Section 7.5: Non-dissipative overcurrent protection. The two
current sensing inputs (SENSEA and SENSEB) should be connected to the sensing
resistors with a trace length as short as possible in the layout. The sense resistors should be
non-inductive resistors to minimize the di/dt transients across the resistor. To increase noise
immunity, unused logic pins (except EN) are best connected to 5 V (high logic level) or GND
(low logic level) (see Table 4: Pin description on page 6). It is recommended to keep power
ground and signal ground separated on the PCB.
Table 7. Component values for typical application
Component
Value
Component
Value
C1
C2
CA
CB
CBOOT
CP
CEN
CREF
100 µF
100 nF
1 nF
1 nF
220 nF
10 nF
5.6 nF
68 nF
D1
D2
RA
RB
REN
RP
RSENSEA
RSENSEB
1N4148
1N4148
39 K
39 K
100 K
100
0.3
0.3
24/35
DocID7514 Rev 2
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