Overview
The MC33814AE, produced by NXP Semiconductors (formerly Freescale Semiconductor), is a highly integrated two-cylinder small engine control IC. Powered by SMARTMOS technology, this IC is designed to manage one and two-cylinder engines efficiently. It features a comprehensive set of drivers, regulators, and protection mechanisms, making it an ideal solution for various small engine applications. The IC includes six low-side drivers, three configurable pre-drivers, a 5.0 V regulator for the MCU, and a protected external sensor supply. Its innovative Variable Reluctance Sensor (VRS) system enhances noise immunity during engine cranking conditions, and diagnostic features ensure safe operation.
Key Specifications
| Characteristic | Min. | Typ. | Max. | Unit | Notes |
|---|---|---|---|---|---|
| Supply Voltage (VPWR) | 4.5 | - | 36 | V | Logic Stable Range: 2.5 V, Full Operational Range: 4.5 V to 18 V, Full Parameter Specification Range: 6.0 V to 18 V |
| Supply Current (IVPWR) - All Outputs Disabled | - | 10.0 | 14.0 | mA | Normal Mode, excludes base current to the external PNP |
| Supply Current (IVPWR) - Sleep State | - | - | 10.0 | mA | PWREN = 0 and KEYSW ≤ 0.8 V for sleep state |
| MCU Supply (VCC) | - | 5.0 | - | V | ±2.0%, 200 mA regulated supply |
| Sensor Supply (VPROT) | - | - | - | V | 100 mA, VCC tracking protected sensor supply |
| Operating Temperature (TA) | -40 | - | 125 | °C | Ambient temperature range |
| Package Type | - | - | - | - | 48-PIN LQFP-EP |
Key Features
- Operates over a supply voltage range of 4.5 V to 36 V
- Start-up/shutdown control and power sequence logic with KEYSW input
- MCU supply: 5.0 V (±2.0%, 200 mA) regulated supply
- Sensor supply: VPROT (100 mA) is a VCC tracking protected sensor supply
- Three configurable pre-drivers for IGBT or general purpose gate MOSFETs for ignition and O2 sensor (HEGO) heater
- MCU Interface: 16-bit SPI and parallel interface with 5.0 V IO capability
- Innovative VRS system optimizes noise immunity under cranking conditions
- Diagnostic and protection features present on all outputs for safe operation
- Six low-side drivers with full diagnostics, self-protection, and PWM control
- K-line (ISO9141) MCU reset generator and programmable watchdog
Applications
- Small Engine Control for motor scooters
- Small motorcycles
- Lawn mowers
- Lawn trimmers
- Snow blowers
- Chain saws
- Gasoline-driven electrical generators
- Outboard motors
Q & A
- What is the primary function of the MC33814AE IC?
The MC33814AE is a two-cylinder small engine control IC designed to manage one and two-cylinder engines efficiently.
- What is the supply voltage range for the MC33814AE?
The supply voltage range is from 4.5 V to 36 V.
- What type of MCU interface does the MC33814AE support?
The IC supports a 16-bit SPI and parallel interface with 5.0 V IO capability.
- What is the purpose of the VRS system in the MC33814AE?
The VRS system optimizes noise immunity under engine cranking conditions.
- What are the key diagnostic and protection features of the MC33814AE?
The IC includes diagnostic and protection features on all outputs, such as overcurrent shutdown, short-to-battery shutdown, and temperature limits.
- What types of drivers are included in the MC33814AE?
The IC includes six low-side drivers, three configurable pre-drivers, and drivers for fuel injectors, fuel pumps, power relays, and warning lamps.
- What is the operating temperature range for the MC33814AE?
The operating temperature range is from -40°C to 125°C.
- What package type is the MC33814AE available in?
The IC is available in a 48-PIN LQFP-EP package.
- What are some common applications for the MC33814AE?
Common applications include small engine control for motor scooters, small motorcycles, lawn mowers, lawn trimmers, snow blowers, chain saws, gasoline-driven electrical generators, and outboard motors.
- Does the MC33814AE support any communication protocols?
Yes, it supports the K-line (ISO9141) communication protocol and includes an MCU reset generator and programmable watchdog.
