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L99MH98 Fiches technique(PDF) 43 Page - STMicroelectronics

No de pièce L99MH98
Description  Automotive octal half-bridge pre-driver
PDF  147 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99MH98 Fiches technique(HTML) 43 Page - STMicroelectronics

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Figure 29. Two cascaded DC motors summary of the off-state diagnostic
VDH
SH1
SH2
GND
M
VDH
SH3
GND
M
VDS_LS1
+
-
VDS_LS1_DIAG
VDS_HS1
+
-
VDS_HS1_DIAG
VDS_LS3
+
-
VDS_LS3_DIAG
VDS_HS3
+
-
VDS_HS3_DIAG
GND
VSHx_OL
IPD
IPU
VODLS = 1.8 V
VODLS = 1.8 V
VODHS = 1.8 V
VODHS = 1.8 V
IPU
IPD
GND
IPU
IPD
VDS_HS2
VDS_LS2
VDS_LS2_DIAG
+
-
VDS_HS2_DIAG
+
-
+-
+-
+-
+-
+-
+-
VODHS = 1.8 V
VODLS = 1.8 V
GND
VSHx_OL
VSHx_OL
Table 31. Differentiation between normal condition, short to VDH, short to GND and open load with two
motors
Load
conditions
Configuration
IPU
HB1
IPU
HB2
IPU
HB3
IPD
HB1
IPD
HB2
IPD
HB3
VDS_LS1 VDS_LS2 VDS_LS3 VDS_HS1 VDS_HS2 VDS_HS3
Normal
condition
1
OFF
OFF
OFF
ON
ON
ON
LOW
LOW
LOW
HIGH
HIGH
HIGH
2
ON
ON
OFF
OFF
OFF
ON
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
3
OFF
ON
ON
ON
OFF
OFF
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
4
ON
OFF
ON
OFF
ON
OFF
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
Short to VDH
1
OFF
OFF
OFF
ON
ON
ON
HIGH
HIGH
HIGH
LOW
LOW
LOW
2
ON
ON
OFF
OFF
OFF
ON
HIGH
HIGH
HIGH
LOW
LOW
LOW
3
OFF
ON
ON
ON
OFF
OFF
HIGH
HIGH
HIGH
LOW
LOW
LOW
4
ON
OFF
ON
OFF
ON
OFF
HIGH
HIGH
HIGH
LOW
LOW
LOW
Short to GND
1
OFF
OFF
OFF
ON
ON
ON
LOW
LOW
LOW
HIGH
HIGH
HIGH
2
ON
ON
OFF
OFF
OFF
ON
LOW
LOW
LOW
HIGH
HIGH
HIGH
3
OFF
ON
ON
ON
OFF
OFF
LOW
LOW
LOW
HIGH
HIGH
HIGH
4
ON
OFF
ON
OFF
ON
OFF
LOW
LOW
LOW
HIGH
HIGH
HIGH
Open load motor
1
1
OFF
OFF
OFF
ON
ON
ON
LOW
LOW
LOW
HIGH
HIGH
HIGH
2
ON
ON
OFF
OFF
OFF
ON
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
3
OFF
ON
ON
ON
OFF
OFF
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
4
ON
OFF
ON
OFF
ON
OFF
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
Open load motor
2
1
OFF
OFF
OFF
ON
ON
ON
LOW
LOW
LOW
HIGH
HIGH
HIGH
2
ON
ON
OFF
OFF
OFF
ON
HIGH
HIGH
LOW
HIGH
HIGH
HIGH
3
OFF
ON
ON
ON
OFF
OFF
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
4
ON
OFF
ON
OFF
ON
OFF
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
Open load motor
1 and motor 2
1
OFF
OFF
OFF
ON
ON
ON
LOW
LOW
LOW
HIGH
HIGH
HIGH
2
ON
ON
OFF
OFF
OFF
ON
HIGH
HIGH
LOW
HIGH
HIGH
HIGH
3
OFF
ON
ON
ON
OFF
OFF
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
4
ON
OFF
ON
OFF
ON
OFF
HIGH
LOW
HIGH
HIGH
HIGH
HIGH
The test configurations 1, 2, 3 are sufficient to differentiate a normal load condition from all the fault conditions.
5.7
Diagnostic not output (DIAGN)
The microcontroller can use the DIAGN pin for diagnostic.
DIAGN pin is used to detect a device fault, including a SPI error, watchdog error or a device power-on-reset
event: the purpose of the DIAGN output pin is to warn immediately the microcontroller that a new fault, which the
microcontroller was not yet aware of, has been detected by the device, without the need of periodic SPI transfers.
L99MH98
Protections and diagnostics
DS14611 - Rev 3
page 43/147



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