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BTS740S2 Datasheet(PDF) 10 Page - Infineon Technologies AG |
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BTS740S2 Datasheet(HTML) 10 Page - Infineon Technologies AG |
10 / 17 page Data Sheet 10 V1.0, 2007-05-13 Smart High-Side Power Switch BTS740S2 GND disconnect 352)(7 9 ,1 67 287 *1' EE 9EE 9,1 967 9*1' Any kind of load. In case of IN = high is VOUT ≈ VIN - VIN(T+). Due to VGND > 0, no VST = low signal available. GND disconnect with GND pull up 352)(7 9 ,1 67 287 *1' EE 9EE 9*1' 9,1 967 Any kind of load. If VGND > VIN - VIN(T+) device stays off Due to VGND > 0, no VST = low signal available. Vbb disconnect with energized inductive load 352)(7 9 ,1 67 287 *1' EE 9EE KLJK For inductive load currents up to the limits defined by Z L (max. ratings and diagram on page 10) each switch is protected against loss of Vbb. Consider at your PCB layout that in the case of Vbb dis- connection with energized inductive load all the load current flows through the GND connection. Inductive load switch-off energy dissipation 352)(7 9 ,1 67 287 *1' EE ( ( ( ($6 EE / 5 (/RD 5/ / ^/= Energy stored in load inductance: EL = 1/2·L·I 2 L While demagnetizing 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)|) OQ (1+ IL·RL |VOUT(CL)| ) Maximum allowable load inductance for a single switch off (one channel)4) / I,/ Tj,start = 150°C, Vbb = 12 V, RL =0 Ω ZL [mH] |
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