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PDF IFX9201SG Data sheet ( Hoja de datos )
| Número de pieza | IFX9201SG | |
| Descripción | 6A H-Bridge with SPI | |
| Fabricantes | Infineon | |
| Logotipo |  |
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IFX9201SG
6 A H-Bridge with SPI
Data Sheet
Rev. 1.1, 2015-02-15
Automotive Power
1 page  
2.3 Terms
IFX9201SG
Pin Configuration
VD IS
VD IR
VPWM
I D IS
IDIR
IPWM
DIS
DIR
PWM
VCSN
VSC K
VSI
VSO
ICSN
ISCK
ISI
ISO
IVSO
VVSO
CSN
SCK
SI
SO
VSO
IVS
VS VVS
OUT1
IOUT1
OUT2
GND
IOU T2
VOU T2
VOU T1
Figure 2 Terms IFX9201SG
Data Sheet
5 Rev. 1.1, 2015-02-15
5 Page 
IFX9201SG
Block Description
4.10
Undervoltage Shut-Down
If the supply voltage at the VS pins falls below the undervoltage detection threshold VUV_OFF, the outputs are turned
off. The undervoltage detection is not latching. That means that as soon as VS rises above VUV_ON again, the
device is returning to normal operation.
4.11
Open Load Detection
4.11.1 Open Load Detection in OFF state
When the bridge is disabled (DIS=high) the open load in OFF detection becomes active. Two diagnostic current
sources will then be connected to the outputs, a pull up current source at OUT1 and a pull down current source at
OUT2. The pull down current source is stronger than the pull up current source and therefore will pull down OUT1
if a load is present. If no load is present OUT1 will be pulled high by the pull up current source. This is detected
by a comparator and reported in the SPI diagnosis register.
Please note that capacitors that might be placed at the outputs for EMC reasons first have to be discharged by
the pull down current source at OUT2 for the open load detection to work properly.
Also, if current is flowing through the load at the time of disabling the freewheeling current will force the outputs
towards supply voltage VS. This may lead to an erroneous reporting of open load.
Therefore the first diagnostic reading after disabling should be discarded and a second reading should be taken
after the load is deenergized and the output capacitors are discharged completely.
The open load detection can be disabled by setting the OLDIS bit in the CTRL_REG register. This will disconnect
the diagnostic current sources and suppress the reporting of open load in the DIA_REG register.
5V int.
OUT1
OUT2
M
Vref_OL
+
-
OL
Figure 4-5 Open Load Detection in OFF state
4.11.2 Open Load Detection in ON state
The IFX9201SG contains an open load diagnosis during operation for inductive loads. It evaluates whether
freewheeling occurs in the switching phase. In order to avoid inadvertent triggering of the open load diagnosis a
failure counter is implemented. There have to be at least 5 occurances of the internal open load signal (i.e. 5 PWM
pulses without freewheeling detected) before open load is reported in the SPI diagnosis register.
Depending on the operation conditions and on external circuitry like the output capacitors it is possible that open
load is indicated although the load is present. This might be the case for example during a direction change or for
small load currents respectively small PWM duty cycles. Therefore it is recommended to evaluate the open load
diagnosis only in known suitable operating conditions and to ignore it otherwise.
The open load diagnosis is not latching.
Data Sheet
11 Rev. 1.1, 2015-02-15
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet IFX9201SG.PDF ] | |
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