BTM7755G Datasheet, PDF (15/24 Pages) Infineon Technologies AG – High Current H-Bridge Trilith IC 3G

High Side Switch
14
13
I_CLH0
12
T_j = -40°C
T_j = 25°C
T_j = 150°C
High Current H-Bridge
BTM7755G
Block Description and Characteristics
Low Side Switch
14
13
I_CLL0
12
T_j = -40°C
T_j = 25°C
T_j = 150°C
11
11
10
0
50
100
150
10
0
50
dI_L/dt [A/ms]
Figure 11 Current Limitation Level vs. Current Slew Rate dI_L/dt
High Side Switch
16
Low Side Switch
16
15
15
14
14
13
T_j = -40°C
13
T_j = 25°C
12
12
T_j = 150°C
11
11
10
10
9
9
8
8
6
10
14
18
22
26
6
10
14
V_S [V]
Figure 12 Typical Current Limitation Detection Levels vs. Supply Voltage
10 0
150
dI_L/dt [A/ms]
T_j = 25°C
T_j = -40°C
T = 150°C
j
18
22
26
V_S [V]
In combination with a typical inductive load, such as a motor, this results in a switched mode current limitation.
This method of limiting the current has the advantage that the power dissipation in the BTM7755G is much smaller
than by driving the MOSFETs in linear mode. Therefore it is possible to use the current limitation for a short time
without exceeding the maximum allowed junction temperature (e.g. for limiting the inrush current during motor start
up). However, the regular use of the current limitation is allowed as long as the specified maximum junction
temperature is not exceeded. Exceeding this temperature can reduce the lifetime of the device.
Data Sheet
15
Rev. 2.0, 2010-05-28