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LM1946N Folha de dados(PDF) 1 Page - National Semiconductor (TI) |
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LM1946N Folha de dados(HTML) 1 Page - National Semiconductor (TI) |
1 / 12 page TLH8707 February 1993 LM1946 OverUnder Current Limit Diagnostic Circuit General Description The LM1946 provides the industrial or automotive system designer with over or under current limit detection superior to that of ordinary transistor or comparator-based circuits Each of the five independent comparators can be used to monitor a separate load as either an over current or under current limit detector Two comparators monitoring a single load can function as a current window monitor Current is sensed by monitoring the voltage drop across the wiring harness pc board trace or external sense resistor that feeds the load Provisions for compensating the user set limits for wiring harness resistance variations over temperature and supply voltage variations are also available When a limit is reached in one of the comparators it turns on its output which can drive an external LED or microproc- essor One side of the load can be grounded (not possible with ordinary comparator designs) which is important for auto- motive systems Features Y Five independent comparators Y Capable of 20 mA per output Y Low power drain Y User set input threshold voltages Y Reverse battery protection Y 60V load dump protection on supply and all inputs Y Input common mode range exceeds VCC Y Short circuit protection Y Thermal overload protection Y Prove-out test pin Y Available in plastic DIP and SO packages Applications Y Lamp fault detector Y Motor stall detector Y Power supply bus monitoring Typical Application CircuitLamp Fault Detector (IL l 1A) TLH8707 – 2 FIGURE 1 C1995 National Semiconductor Corporation RRD-B30M115Printed in U S A |
Nº de peça semelhante - LM1946N |
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Descrição semelhante - LM1946N |
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