EVAL6226QR STMicroelectronics, EVAL6226QR Datasheet - Page 19

• Manufacturer Part Number: EVAL6226QR
• Description: EVAL BOARD FOR L6226Q
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of EVAL6226QR

• Mfg Application Notes: EVAL6226QR AppNote
• Main Purpose: Power Management, Motor Control
• Embedded: No
• Utilized Ic / Part: L6226Q
• Primary Attributes: Stepper, Bi-Polar/2-Phase, 1A DC, 8 ~ 52V Output
• Secondary Attributes: Thermal Protection, Internal Free Wheeling Diodes
• Board Size: 27 mm x 24.5 mm
• Maximum Operating Temperature: + 125 C
• Operating Supply Voltage: 8 V to 52 V
• Product: Power Management Modules
• Dimensions: 27 mm x 24.5 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6226Q
• Other names: 497-6816

L6226Q
6
Paralleled operation
The outputs of the L6226Q can be paralleled to increase the output current capability or
reduce the power dissipation in the device at a given current level. It must be noted,
however, that the internal wire bond connections from the die to the power or sense pins of
the package must carry current in both of the associated half bridges. When the two halves
of one full bridge (for example OUT1
current rating is not increased since the total current must still flow through one bond wire on
the power supply or sense pin. In addition the over current detection senses the sum of the
current in the upper devices of each bridge (A or B) so connecting the two halves of one
bridge in parallel does not increase the over current detection threshold.
For most applications the recommended configuration is half bridge 1 of bridge A paralleled
with the half bridge 1 of the bridge B, and the same for the half bridges 2 as shown in
Figure
R
When connected in this configuration the over current detection circuit, which senses the
current in each bridge (A and B), will sense the current in upper devices connected in
parallel independently and the sense circuit with the lowest threshold will trip first. With the
enables connected in parallel, the first detection of an over current in either upper DMOS
device will turn of both bridges. Assuming that the two DMOS devices share the current
equally, the resulting over current detection threshold will be twice the minimum threshold
set by the resistors R
In this configuration the resulting bridge has the following characteristics.
●
●
●
●
DS(on)
Equivalent device: full bridge
R
2.8 A max RMS load current
5.6 A max OCD threshold
DS(on)
15. The current in the two devices connected in parallel will share very well since the
of the devices on the same die is well matched.
0.37 Ω typ. value @ T
CLA
or R
CLB
Doc ID 14335 Rev 5
in
J
Figure
= 25 °C
A
and OUT2
15. It is recommended to use R
A
) are connected in parallel, the peak
Paralleled operation
CLA
= R
CLB
.
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