Date: 26th July 2011
AEC-Q100 version of LED driver chip from
Micrel
Micrel Inc. has rolled out the MAQ3203, an AEC-Q100 version
of the MIC3203. This new step-down High Brightness LED (HBLED)
driver IC reduces the complexity and cost of high current
LED driver solutions in automotive lighting applications.
The MAQ3203 is currently available in volume quantities,
with 1Ku pricing starting at $1.50. Samples can now be ordered
at: http://www.micrel.com/ProductList.do.
"LED-based lighting is gaining popularity in automotive
applications with both LED makers and LED light engine designers
in need of more robust, efficient solutions that enable
OEMs to realize the full benefits of energy-efficient LEDs,"
noted Doyle Slack, senior marketing director for Analog.
" By integrating the core functions critical to automotive
LED lighting, the MAQ3203 driver IC offers a compact all-in-one
solution that requires few additional components, enabling
more cost-effective, elegant and reliable LED module designs."
The MAQ3203 is capable of driving multiple HBLEDs in series
at more than 90 percent efficiency with ±5 percent
current accuracy from input voltages of 4.5V to 42V. With
its hysteretic control architecture and high-side current
sense scheme, the device provides an ideal solution to drive
the HBLEDs with constant current. The MAQ3203 operating
frequency is adjustable up to 1.5MHz, which allows flexibility
in the design and offers a frequency dithering feature to
mitigate EMI. The IC features a dedicated PWM dimming pin,
an enable pin for very low power shutdown, over temperature
protection and an under voltage lockout. The MAQ3203 has
an external power switch and requires no external compensation.
The MAQ3203 is available in a SOIC-8L package.
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