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L9960 датащи(PDF) 65 Page - STMicroelectronics |
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L9960 датащи(HTML) 65 Page - STMicroelectronics |
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65 / 95 page ![]() 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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