TLE7209-2R_07 INFINEON [Infineon Technologies AG], TLE7209-2R_07 Datasheet - Page 6

• Manufacturer Part Number: TLE7209-2R_07
• Description: 7 A H-Bridge for DC-Motor Applications
• Manufacturer: INFINEON [Infineon Technologies AG]

2.2
Four n-channel power-DMOS transistors build up the output H-bridge. Integrated circuits
protect the outputs against over current and over-temperature if there is a 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. To drive the gates of the high-side DMOS, an internal charge pump is integrated
to generate a voltage higher than the supply voltage.
2.2.1
To limit the output current at low power loss, a chopper current limitation is integrated as
shown in Figure 3. The current is measured by sense cells integrated in the low-side
switches. When the current limit
switched off for a fixed time
Figure 3
Data Sheet
Power Stages
Chopper Current Limitation
Chopper current limitation
Blanking time t
t
a
.
I
L
has been exceeded for a time
Switch-off time t
b
6
a
Current limit I
t
b
, all output stages are
time
Circuit Description
Rev. 1.4, 2007-04-05
TLE 7209-2R
L