LM1946

If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales office/Distributors for availability and specifications.
Supply Voltage (V_CC and Input Pins)
     Survival Voltage (T 100 ms)               -50V to+60V
     Operational Voltage                                9V to 26V
Internal Power Dissipation (Note 1)           Internally Limited
Output Short Circuit to Ground or V_CC         Continuous
Operating Temperature Range (TA)          -40 to +85
Maximum Junction Temperature                    +150
Storage Temperature Range                   -65 to +150
Lead Temperature (Soldering, 10 sec.)          +260
ESD Susceptibility (Note 3)                               600V

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 microprocessor.

One side of the load can be grounded (not possible with ordinary comparator designs), which is important for automotive systems