L6208QTR STMicroelectronics, L6208QTR Datasheet - Page 24

• Manufacturer Part Number: L6208QTR
• Description: Motor / Motion / Ignition Controllers & Drivers DMOS Dual Full Bridge Driver 5.6A
• Manufacturer: STMicroelectronics

Specifications of L6208QTR

• Product Category: Motor / Motion / Ignition Controllers & Drivers
• Rohs: yes

Output current capability and IC power dissipation
6
24/33
Output current capability and IC power dissipation
Figure
IC power dissipation using PWM current control driving a two-phase stepper motor, for
different driving sequences:
●
●
●
●
For a given output current and driving sequence the power dissipated by the IC can be
easily evaluated, in order to establish which package should be used and how large the
onboard copper dissipating area must be to guarantee a safe operating junction
temperature (125 °C maximum).
Figure 26. IC power dissipation vs. output current in half step mode
HALF STEP mode
energized.
NORMAL DRIVE (FULL STEP TWO-PHASE-ON) mode
phases are energized during each step.
WAVE DRIVE (FULL STEP ONE-PHASE-ON) mode
phase is energized at each step.
MICROSTEPPING mode
provided through the Vref pins.
26, 27,
P
D
[W]
10
8
6
4
2
0
28
0
and
0.5
29
HALF STEP
(Figure
1
show the approximate relation between the output current and the
I
OUT
1.5
Doc ID 018710 Rev 2
[A]
(Figure
26) in which, alternately, one phase / two phases are
2
2.5
29), in which the current follows a sinewave profile,
3
I
I
A
B
Test Conditions:
Supply Voltage = 24V
(Figure
(Figure
I
No PWM
f
OUT
SW
28) in which only one
= 30 kHz (slow decay)
27) in which two
I
OUT
L6208Q
AM02570v1