Datasheet4U Logo Datasheet4U.com

LM1946 Datasheet Lm1946 Over/under Current Limit Diagnostic Circuit

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM1946 Over Under Current Limit Diagnostic Circuit February 1993 LM1946 Over Under Current Limit Diagnostic.

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

Key Features

  • Y Y Y Y Y Y Y Y Y Y Y Five independent comparators Capable of 20 mA per output Low power drain User set input threshold voltages Reverse battery protection 60V load dump protection on supply and all inputs Input common mode range exceeds VCC Short circuit protection Thermal overload protection Prove-out test pin Available in plastic DIP and SO packages.

More Datasheets from National Semiconductor (now Texas Instruments)

Part Number Description
LM194 LM194/LM394 Supermatch Pair
LM1949 LM1949 Injector Drive Controller
LM19 Temperature Sensor
LM1921 1 Amp Industrial Switch
LM193 Low Power Low Offset Voltage Dual Comparators
LM195 Ultra Reliable Power Transistors
LM1950 750mA High Side Switch
LM1951 LM1951 Solid State 1 Amp Switch
LM196 LM196/LM396 10 Amp Adjustable Voltage Regulator
LM1964 Sensor Interface Amplifier

LM1946 Distributor