TLE8108EM Infineon Technologies, TLE8108EM Datasheet - Page 12

• Manufacturer Part Number: TLE8108EM
• Manufacturer: Infineon Technologies

Specifications of TLE8108EM

• Packages: PG-SSOP-24
• Thermal Class: Exposed Pad
• Id Nom: 8 x 0.5 A
• Pin Count: 24.0 Pins
• Channels: 8.0
• Comment: 8 channel realy and LED driver

5.2
5.2.1
When switching off inductive loads, the potential at pin OUT rises to
intends to continue driving the current. The voltage clamping is necessary to prevent destruction of the device.
See
output enters clamping mode, the channel can be turned on again after clamping has disappeared.
Figure 6
Clamping Energy
During demagnetization of inductive loads, energy has to be dissipated in the TLE8108EM. This energy can be
calculated with following equation:
The maximum energy which is converted into heat, is limited by the thermal design of the component.
•
Data Sheet
E
=
Application hint: It is recommended to consider the real behavior of the load (
vs. current) at each operating condition. Typical small signal parameters provided in the Datasheet of the load
(actuator) might not represent the real behavior under operating conditions.
Figure 6
V
DS CL
(
Power Outputs
Inductive Output Clamp
Internal Clamping Principle
)
for more details. Nevertheless, the maximum allowed load inductance is limited. If a dedicated
⋅
L
----- -
R
L
L
⋅
I
L
–
V
------------------------------------ -
DS CL
(
R
)
L
–
V
V
DS(CL)
BAT
GND
⋅
OUT
ln
⎛
⎝
1
+
12
------------------------------------ -
V
I
L
DS CL
Electrical and functional Description of the Device
(
R
L
)
R
⋅
L
–
I
LOAD
L
V
Smart 8-Channel Low Side Switch
BAT
L
V
L
DS(CL)
⎞
⎠
V
BAT
potential, because the inductance
R
L
and
L
L
vs. temperature and
Rev. 1.0, 2011-03-23
Clamping Principle.vsd
TLE 8108 EM
(1)