Atmel Automotive Solutions for Under the Hood Applications

Automotive pumps requirements differ in ambient temperature, power, and the liquid they pump. Pumps must work reliability and operate without wear. Legacy pump designs use DC motors, while next-generation pumps use BLDC (brush-less DC) motors. BLDC motor control allows designers the ability to precisely adjust the motor torque and speed according to demand. Typical automotive pump power levels exceed 100W and can range down to 10W for decentralized pumps. The hydraulic pumps in stability control systems need power levels around 1KW. Precise electric motor rotor position feedback is not important in pumps. Hence engineers use cost efficient back-EMF (electromotive force) or FOC (field-oriented control) rotor position feedback. An exception is the fuel pump, where a precise flow control is mandatory.

For simple inexpensive pump applications, designers control the pump with a LIN (local interconnect network) bus. Pumps used in stability control systems need higher data rates and are typically connected to the main car backbone CAN (controller area network) bus.

Block Diagram

Fuel Pump, Water Pump, Oil Pump, Hydraulic Pump Diagram


Atmel Products

Atmel Gate Driver SBCsDescription

ATA6823C

H-Bridge Gate-Driver with LIN Transceiver 2.0

ATA6824C

High Temperature H-Bridge Motor Driver with Serial Input Control

ATA6843

BLDC Motor Driver and LIN System Basis Chip with Tjunction up to 150°C

ATA6844

BLDC Motor Driver and LIN System Basis Chip with Tjunction up to 200°C
Atmel MicrocontrollersDescription

ATmega32M1

ATmega M1 Series 32KB Flash, PSC

ATmega64M1

ATmega M1 Series 64KB Flash, PSC

AT32UC3C0512C

32-bit AVR Microcontroller, 512KB Flash, 144-pin, automotive-qualified

AT32UC3C1512C

32-bit AVR Microcontroller, 512KB Flash, 100-pin, automotive-qualified

AT32UC3C2512C

32-bit AVR Microcontroller, 512KB Flash, 64-pin, automotive-qualified

ATxmega64D3

8/16-bit AVR Microcontroller, 64KB Flash, 64-pin, automotive-qualified