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TLE9185QXV33 Datasheet(PDF) 102 Page - Infineon Technologies AG |
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TLE9185QXV33 Datasheet(HTML) 102 Page - Infineon Technologies AG |
102 / 192 page ![]() TLE9185QXV33 BLDC Driver Supervision Functions Datasheet 102 Rev.1.0 2021-01-21 10.9 Bridge driver This section describes the supervision functions related to the bridge driver. 10.9.1 Bridge driver supervision with activated charge pump This section describes the supervision functions when the charge pump is activated. 10.9.1.1 Drain-source voltage monitoring Voltage comparators monitor the activated MOSFETs to protect high-side MOSFETs and low-side MOSFETs against a short circuit respectively to ground and to the battery during ON-state. A drain-source overvoltage is detected on a low-side MOSFET if the voltage difference between VSHx and SL exceeds the threshold voltage configured by LS_VDS (see Table 28). Consequently, the corresponding half- bridge is latched off with the static discharge current. A drain-source overvoltage is detected on a high-side MOSFET if the voltage difference between VS and VSHx exceeds the threshold voltage configured by HS_VDS (see Table 29). Consequently, the corresponding half- bridge is latched off with the static discharge current. Attention: 2 V threshold is dedicated for the diagnostic in off-state. It is highly recommended to select another drain-source overvoltage threshold once the routine of the diagnostic in off-state has been performed to avoid additional current consumption from VS and from the charge pump. The device reports a Drain-Source overvoltage error if both conditions are met: Table 28 Low-side drain-source overvoltage threshold LSxVDSTH[2:0] Drain-Source overvoltage threshold for LSx (typical) 000B 160 mV 001B 200 mV (default) 010B 300 mV 011B 400 mV 100B 500 mV 101B 600 mV 110B 800 mV 111B 2 V Table 29 High-side drain-source overvoltage threshold HSxVDSTH[2:0] Drain-Source overvoltage threshold for HSx (typical) 000B 160 mV 001B 200 mV (default) 010B 300 mV 011B 400 mV 100B 500 mV 101B 600 mV 110B 800 mV 111B 2 V |
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