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Número de pieza | BTS50080-1TEA | |
Descripción | Smart High-Side Power Switch | |
Fabricantes | Infineon Technologies | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de BTS50080-1TEA (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
No Preview Available ! Datasheet, Rev. 1.0, Aug. 2008
BTS50080-1TEA
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
BTS50080-1TEA
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
V bb V bIN
V IN
V bIS
IIN
RIN
V IS
IIS
RIS
Ibb
IN VBB
BTS50080-1TEA
IS OUT
Figure 2 Terms
V ON,
VOFF
IL
V OUT
Terms.emf
Datasheet
5 Rev. 1.0, 2008-08-28
5 Page Smart High-Side Power Switch
BTS50080-1TEA
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 BTS50080-1TEA. 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, 2008-08-28
11 Page |
Páginas | Total 27 Páginas | |
PDF Descargar | [ Datasheet BTS50080-1TEA.PDF ] |
Número de pieza | Descripción | Fabricantes |
BTS50080-1TEA | Smart High-Side Power Switch | Infineon Technologies |
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