Triple Air Core Gauge Driver lowers costs of display meter applications

Melexis targets the launch of the new MLX10420, a triple air core gauge driver with serial interface, at automotive and industrial applications. The IC is able to drive up to 3 air core meters: two 360 degree meters and one 90degree meter resulting in a significant cost reduction.

The MLX10420 is a microprocessor peripheral for air-core meter control with SIN/COS PWM drivers and serial commands. The circuit controls two independent sets of CMOS power bridges. A 10-bit angle is displayed with 9 bits per quadrant resolution PWM whose frequency is set by an on chip oscillator. A power-on self test detects open or short-circuit outputs for each air-core meter. A real time angle tracking scheme avoids display errors.
The chip can additionally drive one small angle air-core meter (90¡ã). The communication with the microprocessor is done via a three wire serial link. A beneficial feature on the MLX10420 is the special output pin for a possible error status.

Marc Lambrechts, Business Unit Manager SOC at Melexis comments: ¡°The device is perfectly fit for many low-cost analog metering applications. Due to our automotive specialization we developed the IC to meet the automotive market¡¯s quality requirements. Therefore the MLX10420 can fit perfectly in meter applications for motorcycles, small cars, retro-style dashboards, and also industrial measurement applications.¡±

The MLX10420 is available in a SSOP20 package. The 10,000 piece price is 0.98 USD.


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