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PDF BTS4175SGA Data sheet ( Hoja de datos )
| Número de pieza | BTS4175SGA | |
| Descripción | Smart High-Side Power Switch | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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Data Sheet, Rev.1.0, April 2008
BTS4175SGA
Smart High-Side Power Switch
Automotive Power
1 page  
2 Block Diagram
BTS4175SGA
Block Diagram
VS
in te r n a l
voltage sensor
power
su p p ly
o ve r
te m p e r a tu r e
clamp for
T
inductive load
gate control
IN
d r ive r
logic
&
charge pump
over current
switch off
ESD
p r o te ctio n
open load detection
OUT
ST
GND
Figure 1 Block diagram for the BTS4175SGA
Block diagram .emf
Data Sheet
5 Rev.1.0, 2008-04-29
5 Page 
BTS4175SGA
Power Stage
5.3 Inductive Output Clamp
When switching OFF inductive loads with high side switches, the voltage VOUT drops below ground potential,
because the inductance intends to continue driving the current. To prevent the destruction of the device due to
high voltages, there is a voltage clamp mechanism implemented that keeps the negative output voltage at a certain
level (VS-VDS(AZ)). Please refers to Figure 6 and Figure 7 for details. Nevertheless, the maximum allowed load
inductance is limited.
V BAT
IN
LOGIC
GND
VIN
VS
OUT
IL
L, RL
VDS
VOUT
Figure 6 Output clamp
IN
Output clamp.vsd
VOUT
VS
VS-VDS(AZ)
IL
tpeak
t
t
Figure 7 Switching in inductance timing
t
Switching an inductance.vsd
Maximum Load inductance
During demagnetization of inductive loads, energy has to be dissipated in the BTS4175SGA. This energy can be
calculated with following equation:
E = VDS(AZ) × R---L--L-- ×
-V----S-----–-----V----D-----S----(--A-----Z----)
RL
+
ln ⎝⎛ -V----S-----–R----V-L----D-×----S-I--L-(--A-----Z----)⎠⎞
+
IL
Following equation simplifies under the assumption of RL = 0Ω.
Data Sheet
11 Rev.1.0, 2008-04-29
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet BTS4175SGA.PDF ] | |
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