Automotive programmable solenoid controller adds precision in direct fuel injection

January 16, 2014 // By Graham Prophet
Integrated intelligence increases valve drive precision and reduces bill of materials: Freescale Semiconductor's MC33816 programmable solenoid controller can assist in reducing emissions and improve fuel efficiency for both gasoline and diesel direct fuel injection engines. The flexible architecture is also applicable for driving dual clutch transmissions, as well as precision solenoids in factory automation applications.

The MC33816 programmable solenoid controller embeds intelligence with four integrated μCores, enabling four parallel tasks to run independently of a main system microcontroller. The result is a response time up to a claimed 16-times faster than traditional architectures, for precise fuel delivery that reduces unnecessary fuel use.

Freescale comments that increasingly stringent fuel efficiency standards require highly advanced analogue technologies: the intelligent MC33816 controller also provides embedded encryption and microcode protection to inhibit reverse engineering and help safeguard system IP and software.

Features include:

· 9-32V continuous supply, 5.5-58V transient

· Up to 72V pre-driver operating range

· Precision peak and hold drive capability

· Integrated DC-DC boost converter control circuitry

· Choice of four programmable slew rates 12.5 V/ µsec – 300 V/ µsec

· 10 x 10 mm 64-pin LQFP-EP package

The KIT33816AEEVM evaluation board is available now at for $216. To demonstrate the embedded functions of the MC33816 programmable solenoid controller, software with SPI generator (SPIGen) can be downloaded at

The MC33816 programmable solenoid controller, from costs $3.06(100,000).