LM1946 Overview
Key Specifications
Package: SOP
Max Voltage (typical range): 16 V
Min Voltage (typical range): 9 V
Max Operating Temp: 85 °C
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 microprocessor One side of the load can be grounded (not possible with ordinary comparator designs) which is important for automotive systems.
