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BTS5242-2L Datasheet(PDF) 11 Page - Infineon Technologies AG |
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BTS5242-2L Datasheet(HTML) 11 Page - Infineon Technologies AG |
11 / 24 page Data Sheet 11 Rev.1.2, 2008-09-01 Smart High-Side Power Switch BTS5242-2L Block Description and Electrical Characteristics A high signal at the input pin causes the power DMOS to switch on with a dedicated slope, which is optimized in terms of EMC emission. Figure 6 Switching a Load (resistive) 5.1.3 Inductive Output Clamp When switching off inductive loads with high-side switches, the voltage VOUT drops below ground potential, because the inductance intends to continue driving the current. Figure 7 Output Clamp (OUT1 and OUT2) To prevent destruction of the device, there is a voltage clamp mechanism implemented that keeps that negative output voltage at a certain level (VOUT(CL)). See Figure 7 and Figure 8 for details. Nevertheless, the maximum allowed load inductance is limited. Figure 8 Switching an Inductance IN VOUT t SwitchOn.emf tON tOFF t 90% 10% dV /dtON 30% 70% dV / dtOFF 40% OutputClamp.emf OUT GND Vbb VBB L, RL V OUT I L VOUT InductiveLoad.emf t IL t VOUT(CL) Vbb IN = 5V IN = 0V |
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