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PDF BTS50080-1TMA Data sheet ( Hoja de datos )
| Número de pieza | BTS50080-1TMA | |
| Descripción | Smart High-Side Power Switch | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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Datasheet, Rev. 1.0, Jan. 2008
BTS50080-1TMA
Smart High-Side Power Switch
PROFET®
One Channel
Automotive Power
1 page  
2 Block Diagram and Terms
2.1 Block Diagram
Smart High-Side Power Switch
BTS50080-1TMA
Block Diagram and Terms
logic IC
Rbb
IN
IIN
VIS
IS
VIN IIS
RIS
driver
logic
voltage sensor
over
temperature
gate control
&
charge pump
clamp for
inductive load
current
limitation
load current
sense
forward voltage drop detection
Figure 1 Block Diagram
2.2 Terms
Following figure shows all terms used in this data sheet.
base chip
Vbb
T
OUT
IL
Overview .emf
Vbb VbIN
VIN
VbIS
IIN
RIN
IIS
VIS
RIS
Ibb
IN VBB
BTS50080-1TMA
IS OUT
Figure 2 Terms
VON
IL
VOUT
Terms.emf
Datasheet
5 Rev. 1.0, 2008-01-23
5 Page 
Smart High-Side Power Switch
BTS50080-1TMA
Power Stages
Vbb
VON
VBB
IL
OUT VOUT
L,
RL
Figure 8 Output Clamp
OutputClamp .emf
To prevent destruction of the device, there is a voltage clamp mechanism implemented that keeps the voltage drop
across the device at a certain level (VON(CL)). See Figure 8 and Figure 9 for details. The maximum allowed load
inductance is limited.
VOUT
Vbb
VOUT(CL)
ON
VON(CL)
OFF
t
IL
Figure 9 Switching an Inductance
t
InductiveLoad.emf
5.3.1
Maximum Load Inductance
While de-energizing inductive loads, energy has to be dissipated in the BTS50080-1TMA. This energy can be
calculated via the following equation:
E = VON(CL) ⋅
V----b--b----–------V---O----N---(--C---L---)--
RL
⋅ ln1 +
--V---O---N---R-(-C-L--L--⋅-)--I--L–-----V---b---b
+ IL
⋅
--L---
RL
In the event of de-energizing very low ohmic inductances (RL≈0) the following, simplified equation can be used:
E
=
12--
LI
2
L
⋅
---------V---O----N---(-C---L---)--------
VON(CL) – Vbb
The energy, which is converted into heat, is limited by the thermal design of the component. For given starting
currents the maximum allowed inductance is therefore limited. See Figure 10 for the maximum allowed
inductance at Vbb=12V.
Datasheet
11 Rev. 1.0, 2008-01-23
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet BTS50080-1TMA.PDF ] | |
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