L6226 STMicroelectronics, L6226 Datasheet - Page 15

• Manufacturer Part Number: L6226
• Description: DMOS DUAL FULL BRIDGE DRIVER
• Manufacturer: STMicroelectronics

To operate the device in parallel and maintain a lower over current threshold, Half Bridge 1 and the Half Bridge
2 of the Bridge A can be connected in parallel and the same done for the Bridge B as shown in Figure 14. In
this configuration, the peak current for each half bridge is still limited by the bond wires for the supply and sense
pins so the dissipation in the device will be reduced, but the peak current rating is not increased.
When connected in this configuration the over current detection circuit, senses the sum of the current in upper
devices connected in parallel. With the enables connected in parallel, an over current will turn of both bridges.
Since the circuit senses the total current in the upper devices, the over current threshold is equal to the threshold
set the resistor R
and resistor R
It is recommended to use R
In this configuration, the resulting bridge has the following characteristics.
- Equivalent Device: FULL BRIDGE
- R
- 1.4A max RMS Load Current
- 2.8A max OCD Threshold
Figure 14. Parallel connection with lower Overcurrent Threshold
8-52V
DS(ON)
VS
+
GROUND
-
DC
POWER
GROUND
SIGNAL
0.37
LOAD
C
1
CLB
Typ. Value @ T
CLA
sets the threshold when outputs OUT1
or R
C
CLB
2
CLA
C
in figure 14. R
BOOT
= R
J
D
= 25°C
1
CLB
D
.
2
R
P
SENSE
SENSE
CLA
VBOOT
C
OUT1
OUT2
OUT1
OUT2
P
GND
GND
GND
GND
VCP
VS
VS
sets the threshold when outputs OUT1
A
B
A
B
A
A
B
B
20
17
22
15
3
10
5
21
8
16
18
19
6
7
B
and OUT2
B
are high.
D02IN1361
23
14
11
12
24
13
4
9
1
2
OCD
EN
OCD
EN
IN1
IN2
IN1
IN2
PROGCL
PROGCL
A
B
A
A
B
B
A
B
A
and OUT2
A
B
R
R
C
CLA
CLB
EN
R
EN
IN
IN
A
A
B
are high
L6226
15/22
EN