TLE8444SL Infineon Technologies, TLE8444SL Datasheet - Page 14

• Manufacturer Part Number: TLE8444SL
• Description: IC DVR HALF-BRIDGE QUAD 24SSOP
• Manufacturer: Infineon Technologies
• Type: Half Bridger

Specifications of TLE8444SL

• Input Type: Parallel
• Number Of Outputs: 4
• On-state Resistance: 600 mOhm
• Current - Output / Channel: 1A
• Current - Peak Output: 2.4A
• Voltage - Supply: 8 V ~ 18 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.2
Input Circuit
The control inputs consist of TTL/CMOS-compatible schmitt-triggers with hysteresis. Inputs IN1 and IN3 have
internal pull down circuits whereas IN2 and IN4 have internal pull up circuits. If no signal is applied to the inputs
and INH=HIGH, then the drivers will by default be placed in Brake LL mode. In sleep mode, the outputs are
switched OFF (tristate or HIgh-Z). For optimized bipolar stepper motor control applications, the IN2 and IN4 inputs
have internal inverting structures. This concept allows IN1+IN2 and IN3+IN4 to be tied together, which ultimately
reduces µC output pins and provides a ‘2-phase’ type of control to the device (refer to
Output stages
The output stages consist of a total of 4 DMOS Half-bridges. Integrated circuits protect the outputs against
overcurrent and overtemperature. Positive and negative voltage spikes, which occur during switching of inductive
loads, are supressed through integrated free-wheeling diodes.
The Truth Table below shows the output behavior of OUT1 and OUT2 for DC-motor applications. The same table
is also applied to OUT 3 and OUT4.
Table 1
INH
0
1
1
1
1
1
Note: Half-Bridges 1 and 2 form a full bridge
The Truth Table below shows the output behavior of OUT1 and OUT2 for bipolar Stepper-motor applications. The
same table is also applied to OUT 3 and OUT4.
Table 2
INH
0
1
1
1
1
1
Note: Half-Bridges 1 and 2 form a full bridge
Data Sheet
IN1
X
open
0
0
1
1
IN1
X
open
0
0
1
1
Input / Output Stages
Functional Truth Table of Half-bridge 1 and 2 for DC-Motor Application
Functional Truth Table of Half-bridge 1 and 2 for Bipolar Stepper Motor Application
IN2
X
open
0
1
0
1
IN2
X
open
0
1
0
1
OUT1
|Z|
L
L
L
H
H
OUT1
|Z|
L
L
L
H
H
OUT2
|Z|
L
H
L
H
L
OUT2
|Z|
L
H
L
H
L
14
Mode
Sleep Mode (Low current consumption mode)
Brake LL (both low side transistors turned-ON)
DC-Motor turns counterclockwise (CCW)
Brake LL (both low side transistors turned-ON)
Brake HH (both high side transistors turned-ON)
DC-Motor turns clockwise (CW)
Mode
Sleep Mode (Low current consumption mode)
no current (both low side transistors turned-ON)
negative phase current
no current (both low side transistors turned-ON)
no current (both high side transistors turned-ON)
positive phase current
Figure 19
Rev. 1.1, 2009-07-07
Block Description
and
TLE 8444SL
Figure
21).