The 33812 is an engine control analog power IC intended for motorcycle and other single/dual cylinder small engine control applications. The IC consists of three integrated low side drivers, one pre-driver, a +5.0 V, voltage pre-regulator, an MCU watchdog circuit, an ISO 9141 K-Line interface, and a parallel interface for MCU communication. The three low side drivers are provided for driving a fuel injector, a lamp or LED, and a relay or other load. The pre-driver is intended to drive either an Insulated Gate Bipolar Transistor (IGBT) or a bipolar Darlington transistor to control an ignition coil.
Features
- Designed to operate over the range of ~4.7 V ≤ VPWR ≤ 36 V
- Fuel Injector driver - Current Limit - 4.0 A Typical
- Ignition pre-driver can drive IGBT or Darlington bipolar junction transistors
- Ignition pre-driver has independent high and low side outputs
- Relay driver - Current Limit - 4.0 A Typical
- Lamp driver- Current Limit - 1.5 A Typical
- All external outputs protected against short to battery, over-current
- Ignition and other drivers protected against over-temperature
- Interfaces directly to MCU using 5.0 V parallel interface
- VCC voltage pre-regulator provides +5.0 V power for the MCU
- MCU Power On RESET generator
- MCU watchdog timer circuit with parallel refresh/time setting line
- Independent fault annunciation outputs for ignition and injection
- ISO-9141 K-Line transceiver for communicating diagnostic messages
Featured Documentation
Current Updates & Releases
- KIT33812EKEVBE: 33812 Multifunctional Ignition and Injector Driver Evaluation board
- KIT33812ECUEVME: Small Engine Control Reference Design featuring the 33812 and the S12P
Target Applications
- Products
- Scooters and small motorcycles
- Three-wheelers
- Personal watercraft
- Hybrid vehicle charging engines
- Gas driven electric generators
- Snow mobiles
- Lawn Maintenance Equipment
- Engine Control
- Fuel injection
- Ignition control
- Load switching functions
- MCU power and security
- Solenoid, relay and valve actuation
- General Purpose Embedded Control
- Relay drivers
- Load control
- Interior/Exterior lighting
- LED lighting
- MCU power and reset
- Communication support
Product Specifications
| Power Output Load - Current - Typ (A)(IL) | 1, 0.3 |
| Power Output Load - Number of Channels | 2, 1 |
| Power Output Load - Drain-to-Source On Resistance - Typ (Ohm)(RDS(ON)) | 0.2, 1 |
| Power Output Load - Current Limit per Output - Min (A)(ILIM) | 3, 1 |
| Load Supply Voltage - Min (V) | 4.9 |
| Load Supply Voltage - Max (V) | 36 |
| Supply Voltage - Min (V) | 4.9 |
| Supply Voltage - Max (V) | 36 |
| Interface and Input Control | Parallel |
| Ambient Operating Temperature (Ta) - Min (°C) | -40 |
| Ambient Operating Temperature (Ta) - Max (°C) | 125 |
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