Date: 22/07/2009

Car radio specific voltage regulator IC with diagnosis protection features

Infineon has released single-chip linear voltage regulator TLF4277 for automotive car radios. The output voltage of TLF 4277 low drop out (LDO) voltage regulator can be adjusted as per the requirements of active antennas of various radio frequencies bands such as FM/AM, DAB (Digital Audio Broadcast), and the XM and SIRIUS satellite radio bands. This IC packs integrated current monitor and adjustable current limitation functions inside the chip to increase the reliability of car radios. Infineon claims, its first such chip in the world.

More than 95% of the cars produced all over world use active antennas for receiving radio signals. Active antennas are small enough to easily fit into the windscreen, front bumper or the stub antenna on the car's roof. According to current market researchers, about 52 to 55 million cars are expected to be produced globally in the year 2009. On average, cars are typically equipped with two active antennas and as a result with two active antenna voltage regulators.

The monitor function of the TLF 4277 allows easy detection of failures and simple integration of a failure analysis function in an infotainment system. The AEC-Q100 qualified device is protected against failure situations; such as short-circuit of the output against ground or battery voltage, over-temperature and over-current.

Package: SSOP-14 EP (exposed pad) package
Price: Each $1.11 for 1k pieces.
Availability: Now

For further data visit: www.infineon.com/automotivepower