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BTS50020-1TAD Datasheet(PDF) 30 Page - Infineon Technologies AG |
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BTS50020-1TAD Datasheet(HTML) 30 Page - Infineon Technologies AG |
30 / 51 page Data Sheet 30 Rev. 1.1 2017-03-28 BTS50020-1TAD Smart High-Side Power Switch Functional Description Figure 27 Diagnostic Block Diagram 5.4.2 SENSE Signal in Different Operation Modes 5.4.3 SENSE Signal in the Nominal Current Range Figure 28 and Figure 29 show the current sense as function of the load current in the power DMOS. Usually, a pull-down resistor RIS is connected to the current sense pin IS. A typical value is 1 kΩ. The dotted curve represents the typical sense current, assuming a typical dkILIS factor value. The range between the two solid curves shows the sense accuracy range that the device is able to provide, at a defined current. (5.3) Table 5 Sense Signal, Function of Operation Mode1) 1) Z = High Impedance Operation mode Input Level Output Level VOUT Diagnostic Output (IS)2) 2) See Chapter 5.4.3 for Current Sense Range and Improved Current Sense Accuracy. Normal operation LOW (OFF) ~ GND IIS(OFF) Short circuit to GND GND IIS(OFF) Overtemperature ~ GND IIS(OFF) Short circuit to VS VS IIS(OFF) Open Load Z IIS(OFF) Inverse current > VS IIS(OFF) Normal operation HIGH (ON) ~ VS IIS = (IL / dkILIS) ± IIS0 Overcurrent condition < VS IIS = (IL / dkILIS) ± IIS0 or IIS(FAULT) Short circuit to GND GND IIS(FAULT) Overtemperature (after the event) ~ GND IIS(FAULT) Short circuit to VS VS IIS < IL / dkILIS ± IIS0 Open Load VS IIS0 Inverse current > VS <IIS0 Vs IIS(FAULT) IS 0 1 FAULT ZIS(AZ) RVS VS-VOUT>2V ( IL / dkILIS ) ± IIS(0) & RSenseMos IIS = IL dkILIS + IIS0 with (IIS ≥ 0) |
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