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PDF BTS5012SDA Data sheet ( Hoja de datos )

Número de pieza BTS5012SDA
Descripción Smart High-Side Power Switch
Fabricantes Infineon Technologies 
Logotipo Infineon Technologies Logotipo



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No Preview Available ! BTS5012SDA Hoja de datos, Descripción, Manual

Datasheet, Rev. 1.1, Nov. 2008
BTS5012SDA
Smart High-Side Power Switch
PROFET™
One Channel
Automotive Power

1 page




BTS5012SDA pdf
2 Block Diagram and Terms
2.1 Block Diagram
Smart High-Side Power Switch
BTS5012SDA
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
BTS5012SDA
IS OUT
Figure 2 Terms
VON
IL
VOUT
Terms.emf
Datasheet
5 Rev. 1.1, 2008-11-04

5 Page





BTS5012SDA arduino
Smart High-Side Power Switch
BTS5012SDA
Power Stages
5.3 Output Inductive Clamp
When switching off inductive loads, the output voltage VOUT drops below ground potential due to the involved
inductance ( -diL/dt = -vL/L ; -VOUT -VL ).
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 BTS5012SDA. This energy can be
calculated via the following equation:
E = VON(CL)
V----b--b----------V---O----N---(--C---L---)--
RL
ln1 +
--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 (RL0) the following, simplified equation can be used:
E
=
12--
LI
2
L
---------V---O----N---(-C---L---)--------
VON(CL) Vbb
Datasheet
11 Rev. 1.1, 2008-11-04

11 Page







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