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TDE1891 데이터시트(PDF) 4 Page - STMicroelectronics |
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TDE1891 데이터시트(HTML) 4 Page - STMicroelectronics |
4 / 12 page Figure 1 DIAGNOSTIC TRUTH TABLE Diagnostic Conditions Input Output Diag1 Diag2 Normal Operation L H L H H H H H Open Load Condition (Io <Iold)L H L H H L H H Short to VS L H H H L L H H Short Circuit to Ground (IO =ISC) (**) TDE1891 TDE1890 H <H (*) H L HH L H H H H Output DMOS Open L H L L H L H H Overtemperature L H L L H H L L Supply Undervoltage (VS <Vsth2)L H L L L L L L (*) According to the intervention of the current limiting block. (**) A cold lamp filament, or a capacitive load may activate the current limiting circuit of the I PS, when the IPS is initially turned on. TDE1891 uses Diag2 to signal such condition, TDE1890 does not. SOURCE DRAIN NDMOS DIODE Symbol Parameter Test Condition Min. Typ. Max. Unit Vfsd Forward On Voltage @ Ifsd = 2.5A 1 1.5 V Ifp Forward Peak Current t = 10ms; d = 20% 6 A trr Reverse Recovery Time If = 2.5A di/dt = 25A/ µs 200 ns tfr Forward Recovery Time 100 ns THERMAL CHARACTERISTICS Ø Lim Junction Temp. Protect. 135 150 °C TH Thermal Hysteresis 30 °C SWITCHING CHARACTERISTICS (VS = 24V; RL =12 Ω) ton Turn on Delay Time 200 µs toff Turn off Delay Time 40 µs td Input Switching to Diagnostic Valid 200 µs Note Vil < 0.8V, Vih > 2V @ (V+In > V–In) TRUE FALSE HIGH LOW TDE1890 - TDE1891 4/12 |
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