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BTS6133D Datasheet(PDF) 11 Page - Infineon Technologies AG |
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BTS6133D Datasheet(HTML) 11 Page - Infineon Technologies AG |
11 / 15 page Data sheet BTS 6133 D Infineon Technologies AG 11 of 15 2003-Oct-01 Short circuit detection Fault Condition: VON > VON(SC) (3.5 V typ.) and t> td(SC) (typ.650 µs). Overload detection Fault Condition: VON > 1 V typ. detection circuit Logic unit + Vbb OUT V ON Short circuit Short circuit is a combination of primary and secondary impedance’s and a resistance’s. PROFET V IN OUT IS bb RSC I IN V bb Z L SC L SC 10mOhm 5uH A llowable combinations of minimum, secondary resistance for full protection at given secondary inductance and supply voltage for single short circuit event: 0 5 16V 10 0 100 200 RSC [mOhm] 15 L SC 300 [uH] V : bb 18V 24V 30V Inductive load switch-off energy dissipation PROFET V IN OUT IS bb E E E EAS bb L R ELoad L RL { Z L RIS I IN Vbb i (t) L Energy stored in load inductance: EL = 1/2·L·I 2 L While demagnetising load inductance, the energy dissipated in PROFET is EAS= Ebb + EL - ER= VON(CL)·iL(t) dt, with an approximate solution for RL > 0 Ω: EAS= IL· L 2·RL (Vbb + |VOUT(CL)|) ln (1+ IL·RL |VOUT(CL)| ) Maximum allowable load inductance for a single switch off L = f (IL ); Tj,start = 150°C, Vbb = 12 V, RL = 0 Ω 0,01 0,1 1 10 100 1000 110 100 I_L [A] L [m H ] |
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