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A3197LLT Datasheet(PDF) 7 Page - Allegro MicroSystems |
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A3197LLT Datasheet(HTML) 7 Page - Allegro MicroSystems |
7 / 12 page 3197 PROTECTED, HIGH-TEMP., OPEN-COLLECTOR HALL-EFFECT LATCH www.allegromicro.com ISO Pulse No. Test Test Conditions (over operating temperature range) 1 Inductive Turn Off (Negative) VS = -100 V, RS = 10 Ω, tr = 1 µs, td = 2 ms 2 Inductive Turn Off (Positive) VS = 100 V, RS = 10 Ω, tr = 1 µs, td = 50 µs 3a Capacitive/Inductive Coupling (Neg) VS = -150 V, RS = 50 Ω, tr = 50 ns, td = 100 ns 3b Capacitive/Inductive Coupling (Pos) VS = 100 V, RS = 50 Ω, tr = 50 ns, td = 100 ns 4 Reverse Battery VS = -14 V, td = 20 s 5 Load Dump (ISO) VS = 86.5 V, RS = 0.5 Ω, tr = 5 ms, td = 400 ms (DIN) VS = 120 V, RS = 0.5 Ω, tr = 100 ns, td = 400 ms 6 Ignition Coil Disconnect VS = -300 V, RS = 30 Ω, tr = 60 µs, td = 300 µs EXTERNAL PROTECTION REQ’D 7 Field Decay (Negative) VS = -80 V, RS = 10 Ω, tr = 5 ms, td = 100 ms INTERNAL PROTECTIVE FEATURES Power supply voltage transients, or device output short circuits, may be caused by faulty connectors, crimped wiring harnesses, or service errors. To prevent catastrophic failure, internal protection against overvoltage, reverse voltage, output overloads, and thermal stress have been incorporated to meet the automotive 12 volt system protection requirements of ISO DP7637/1 and DIN 40839-1. A series- blocking diode or current-limiting resistor is required in order to survive pulse number six. 0 12 V V S t r t d 0.9 V 0.1 V S S Dwg. WH-008 |
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