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TLE75242-ESD Datasheet(PDF) 35 Page - Infineon Technologies AG |
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TLE75242-ESD Datasheet(HTML) 35 Page - Infineon Technologies AG |
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35 / 71 page  Datasheet 35 Rev. 1.0 2017-11-23 TLE75242-ESD SPIDER+ 12V Power Stages Figure 19 Output Clamp concept 7.1.3 Maximum Load Inductance During demagnetization of inductive loads, energy has to be dissipated in the TLE75242-ESD. Equation (7.1) shows how to calculate the energy for low-side switches, while Equation (7.2) and Equation (7.3) can be used for high-side switches (auto-configurable switches can use all equations, depending on the load position): (7.1) (7.2) (7.3) The maximum energy, which is converted into heat, is limited by the thermal design of the component. The EAR value provided in Table 2 assumes that all channels can dissipate the same energy when the inductances connected to the outputs are demagnetized at the same time. 7.2 Inverse Current Behavior During inverse current (VOUTn_S > VOUTn_D) in high-side configuration or (VOUTn > VSn) the affected channels stays in ON- or in OFF- state. Furthermore, during applied inverse currents the ERRn bit can be set if the channel is in ON-state and the over temperature threshold is reached. The general functionality (switch ON and OFF, protection, diagnostic) of unaffected channels is not influenced by inverse currents applied to other channels. Parameter deviations are possible especially for the following ones (Over Temperature protection is not influenced): • Switching capability: tON, tOFF, dV/dtON, -dV/dtOFF •Protection: IL(OVL0), IL(OVL1) PowerStage_HS.emf High-side Channel VS L, R L VOUTn IL_S VOUT(CL) VDS(CL) IL VSn OUTn VDS GND EVDS CL () VS VDS CL () – RL --------------------------------- 1 RL I ⋅ L VS VDS CL () – --------------------------------- – ⎝⎠ ⎛⎞ I L + ln ⋅ L RL ------ ⋅⋅ = EVS V – OUTS CL () () VOUTS CL () RL --------------------------- 1 RL I ⋅ L VOUTS CL () --------------------------- – ⎝⎠ ⎛⎞ I L + ln ⋅ L RL ------ ⋅⋅ = EVS V – OUT CL () () VOUT CL () RL ------------------------ 1 RL I ⋅ L VOUT CL () ------------------------ – ⎝⎠ ⎛⎞ I L + ln ⋅ L RL ------ ⋅⋅ = |
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