TLE8209-2SA Datasheet, PDF (14/38 Pages) Infineon Technologies AG – SPI Programmable H-Bridge

TLE8209-2SA
Power Stages
7
Power Stages
The TLE8209-2SA contains four n-channel power-DMOS transistors that can be used in an H-bridge or in dual
half bridge configuration.
Integrated circuits protect the outputs against overcurrent and over-temperature, in case of short-circuit to ground,
to the supply voltage or across the load. Positive and negative voltage spikes, which occur when switching
inductive loads, are limited by integrated freewheeling diodes (body diodes of power-DMOS).
7.1
Parallel or SPI Control
By default the setting of the power switches is controlled by the Inputs IN1, IN2 (parallel control). The outputs
OUT1 and OUT2 are set to High (high-side switch ON, low-side switch OFF) or Low (high-side switch OFF, low-
side switch ON) by the parallel inputs IN1 and IN2, respectively. In SPI mode there is also the option to control the
outputs via the SPI bits SIN1 and SIN2 of the SPI configuration register. To switch to SPI control the bit MUX has
to be set to ’0’.
In addition, the outputs can be disabled (set to tristate, high- and low-side switch OFF) by the disable input DIS
and the bidirectional reset pin ABE. Disabling sets the device to parallel control
Table 1 shows the different options for the output control.
7.2
H-Bridge or Single Switch Usage
The IC can be set to H-bridge mode or single-switch mode by SPI. This setting changes the behavior of the device
in the following features:
• current limiting
• overcurrent shut-down
• open load diagnosis
Table 1 Functional Truth Table
Pos.
DIS ABE IN1 IN2
Forward, parallel ctrl.
L
H
H
L
Reverse, parallel ctrl.
L
H
L
H
Free-wheeling low, parallel ctrl. L
H
L
L
Free-wheeling high, parallel ctrl. L
H
H
H
Forward, SPI ctrl.
L
H
X
X
Reverse, SPI ctrl.
L
H
X
X
Free-wheeling low, SPI ctrl. L
H
X
X
Free-wheeling high, SPI ctrl. L
H
X
X
Disabled by DIS
H
X
X
X
Disabled by ABE
X
L
X
X
Table 2
OUT
H
L
Z
OUT States
High-Side DMOS
ON
OFF
OFF
SPI
MUX
1
1
1
1
0
0
0
0
X
X
SPI
SIN1
X
X
X
X
1
0
0
1
X
X
SPI
SIN2
X
X
X
X
0
1
0
1
X
X
OUT1 OUT2
H
L
L
H
L
L
H
H
H
L
L
H
L
L
H
H
Z
Z
Z
Z
Low-Side DMOS
OFF
ON
OFF
Data Sheet
14
Rev. 1.0, 2010-02-16