Freescale Small Engine Control Circuit

Freescale has combined a highly integrated analog device with a 16-bit microcontroller (MCU) to provide a cost-effective platform solution ideal for small engine control. The platform consists of the MCZ33812, an analog integrated circuit (IC) optimized to control fuel and spark in EFI and electronic carburetion (e-carb) systems, and a Freescale S12 MCU. The small engine control platform helps lower harmful emissions and reduces system complexity, bill of materials, and manufacturing cost, while accelerating time to market.

Freescale Small Engine Control

MCZ33812 Small Engine Control Circuit Features

  • 1 fuel injector low-side driver (current limit – 4.0 A typical)
  • 1 relay, fuel pump or second injector low-side driver (current limit – 4.0 A typical)
  • 1 lamp low-side driver (current limit – 1.5 A typical)
  • 1 ignition pre-driver with independent high- and low-side outputs

The MCZ33812 is available now for a suggested resale price of $1.70 (USD) in 10,000-unit quantities. Freescale is currently sampling the MCZ33812A automotive grade device. The MCZ33812A is planned to be available in Q4 2009.

Freescale’s small engine control platform is ideal for small-displacement two- and four-stroke engines used in motorcycles, mopeds, scooters, and three-wheeled taxis. The platform is also ideal for small engine designs in a wide range of outdoor power equipment, such as lawnmowers, garden tractors, trimmers, edgers, chainsaws, snow and leaf blowers, tillers, electrical generators and outboard motors.

Freescale’s MCZ33812 analog IC combines and optimizes a voltage regulator, fuel injector driver, ignition pre-driver, a relay and lamp driver, watchdog timer, and reset generator for small engine control. The integration, enabled by Freescale SMARTMOS technology, eliminates up to a dozen discrete components and reduces the circuit board area for engine makers while also helping engineers enhance the quality and reliability of products.

To help the small engine market migrate from mechanical/carburetor-based systems to electronic control and fuel injection, Freescale offers a comprehensive system solution featuring a hardware/software reference design to speed the development process. Freescale’s off-the-shelf MCZ33812 Reference Design enables developers to evaluate a two-chip solution based on the MCZ33812 and S12P MCU and emulate a complete small engine electronic control unit (ECU). Freescale also provides optimized software device drivers and engine control software for small-displacement designs. The reference design enables calibration engineers and ECU hardware and software designers to work in parallel, streamlining development and speeding time to market.

More information: Freescale Small Engine Control