U2482B

TELEFUNKEN Semiconductors www.DataSheet4U.com U2481B/ U2482B Automotive Lamp Outage Monitor Description The U2481B and the U2482B multicomparator circuits are designed to monitor automotive illumination by sensing the voltage drop across shunt resistors. Provided with extremely low comparator thresholds, these ICs can be used together as a chip set to build an entire lamp monitor system. Single operation of both circuits is also possible. As a special feature for brake lamp monitoring, the U2481B contains a latch stage connected to one of its triple comparators. With – 4 single comparators – 1 double comparator and – 2 triple comparators each of the integrated circuits monitors up to 12 lamps and up to 6 fuses. All comparator stages are combined together to control the common output stage. Features D Extremely low comparator thresholds of typically 3.5 mV D Internal compensation for copper shunts D Internal compensation for voltage-dependent bulb characteristic D Comparator input voltage may exceed supply voltage D Internal protection measures for pulses according to ISO TR 7637/1 D ESD according to MIL-SID-883 C test method 3015.7 – Human body model: 4 kV – Machine model: 200 V EMI protection (TEM cell up to 100 V/m) Benefits D Extremely low threshold voltage gives low voltage drop via shunt resistor. Power dissipation of the lamp monitor module is minimized D Perfect EMC in conjunction with an appropriate pc board layout Applications Both ICs can be used in any kind of...