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L99MH98 Fiches technique(PDF) 38 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) 38 Page - STMicroelectronics

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Figure 21. One motor in normal conditions, Ishx_PU HB1/HB2 OFF with normal load
VDS_HSx
+
-
VDS_HSx_DIAG
VDS_LSx
+
-
VDS_LSx_DIAG
VDH
GND
VSHx_OL
IPD
IPU
IPD
IPU
SH1
SH2
GND
GND
VSHx_OL
M
+
-
VDS_HSx_DIAG
+
-
VDS_LSx_DIAG
GH1
GL1
GH2
GL2
VODHS = 1.8 V
VODHS = 1.8 V
VODLS = 1.8 V
VODLS = 1.8 V
VDS_HSx
VDS_LSx
HIGH
HIGH
LOW
LOW
+
-
+
-
+
-
+
-
Configuration 2
•
Ishx_PU HB1 ON, Ishx_PD HB1 OFF
•
Ishx_PU HB2 OFF, Ishx_PD HB2 ON
With Ishx_PU HB1 ON the SH1 is pulled to VSHx_OL, so VDS_LS1 and VDS_HS1 go HIGH (see the Figure 22).
SH2 is also pulled to VSHx_OL by Ishx_PU of HB1 via the motor, so also VDS_LS2 and VDS_HS2 go HIGH
VDS_LS2.
Figure 22. One motor in normal conditions with one pull-up diagnostic current on - Configuration 2
VDS_HSx
+
-
VDS_HSx_DIAG
VDS_LSx
+
-
VDS_LSx_DIAG
VDH
GND
VSHx_OL
IPD
IPU
IPD
IPU
SH1
SH2
GND
GND
VSHx_OL
M
+
-
VDS_HSx_DIAG
+
-
VDS_LSx_DIAG
GH1
GL1
GH2
GL2
VODHS = 1.8 V
VODHS = 1.8 V
VODLS = 1.8 V
VODLS = 1.8 V
VDS_HSx
VDS_LSx
HIGH
HIGH
HIGH
HIGH
+
-
+
-
+
-
+
-
Configuration 3
•
Ishx_PU HB1 OFF, Ishx_PD HB1 ON
•
Ishx_PU HB2 ON, Ishx_PD HB2 OFF
This configuration is equivalent to the configuration 2, with HB2 pull-up activated instead of HB1.
With Ishx_PU HB2 ON the SH2 is pulled to VSHx_OL, so VDS_LS2 and VDS_HS2 go HIGH (see the Figure 22).
SH1 is also pulled to VSHx_OL by Ishx_PU of HB2 via the motor, so also VDS_LS1 and VDS_HS1 go HIGH.
The Table 26 summarizes the results obtained in normal conditions.
L99MH98
Protections and diagnostics
DS14611 - Rev 3
page 38/147



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