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TLE9185QXV33 Datasheet(PDF) 107 Page - Infineon Technologies AG |
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TLE9185QXV33 Datasheet(HTML) 107 Page - Infineon Technologies AG |
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107 / 192 page  TLE9185QXV33 BLDC Driver Supervision Functions Datasheet 107 Rev.1.0 2021-01-21 In unidirectional operation, the CSA is optimized to measure the current flowing through the external shunt resistor when VCSAP ≥ VCSAN. VCSO = VREFUnidir + (VCSAP - VCSAN + VOS) × GDIFF provided that VCSO is in the linear range1) 2). Bidirectional operation CSD = 1 In bidirectional operation, the CSA measures the current flowing through the external shunt resistor in both directions: VCSAP ≥ VCSAN or VCSAP ≤ VCSAN. The output CSO works at half-scale range: VCSO = VREF Bidir+ (VCSAP - VCSAN + VOS) × GDIFF, provided that VCSO is in the linear range 2). 10.10.2 Gain configuration The gain of the current sense amplifier is configurable by the configuration bits CSAG bits. Refer to Table 32. 10.10.3 Overcurrent Detection A comparator at CSO detects overcurrent conditions. The overcurrent threshold is configurable with the OCTH bits. Refer to Table 33 for unidirectional operation and Table 34 for bidirectional operation. 1) Valid if 0.5 V ≤ VCSO ≤ VCC1 - 0.5 V. 2) VCSO is clamped between VCC1 and GND. Table 32 Configuration of the current sense amplifier gain CSAG[1:0] Current sense amplifier gain GDIFF 00B GDIFF10 01B GDIFF20 10B GDIFF40 11B GDIFF60 Table 33 Overcurrent detection thresholds in unidirectional operation (CSD = 0) OCTH[1:0] Typical Overcurrent Detection Threshold 00B VCSO > VCC1/2 01B VCSO > VCC1 /2+ VCC1/10 10B VCSO > VCC1/2+ 2 × VCC1/10 11B VCSO > VCC1/2 /2+ 3 × VCC1/10 |
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