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L9960 датащи(PDF) 65 Page - STMicroelectronics

номер детали L9960
подробное описание детали  Automotive Single/Dual H-Bridge, SPI programmable DC Brushed Motor Driver
PDF  95 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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L9960 датащи(HTML) 65 Page - STMicroelectronics

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DS11115 Rev 10
65/95
L9960, L9960T
Functional description
94
4.8.4
Diagnostic of "Over-current" in on-state
The diagnostics of over-current on high-side and low-side transistors are based on 2 bits for
each transistor.
Note:
(-) available in the R10,R9,R7,R6,R4,R3,R1,R0 bit position in SPI answer frame 1.
First bit is overcurrent and second bit is load short detection.
OCxx[1] bit is over current detection: “0” means over current detection
OCxx[0] bit is Ion current threshold detection: “1” means above
Ion_th threshold + Ioc on diagonal MOS (this bit allows a reliable detection of load in
short circuit).
Note:
OCxx[1:0] = 2’b01 is not a possible condition.
Figure 27. Example of correct Overcurrent detection
Table 77. Diagnostic of "Over-current" in on-state
2 Bits status by MOS
OCH0[1:0] / OCH1 [1:0] / OCL0[1:0] / OCL1[1:0]
Priority
Condition
Bits Status 1 Bits Status 0
NOC
ION_TH
1
0
Diag not done or no over current detection
3 (lowest)
Default value
0
0
Diag done, over current detection
1 (highest)
-
1
1
Diag done,load short detect on diagonal MOS
2
-
Ion_th
ILoad
Ioc
Tdiag2
Tdiag1
User case for validity bit assertion
GAPGPS02359



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