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Date: 26-05-11

LIN controlled automotive alternator regulator from Freescale

Freescale Semiconductor has expanded its alternator regulator portfolio with the new TC80310, a single-chip alternator regulator integrated circuit (IC) that integrates local interconnect network (LIN) to provide increased control for automotive alternators.

Freescale says with a single-wire LIN connection to the vehicle's engine control unit (ECU), the ECU can control energy management modes and contribute to energy savings, which is particularly important as regional CO2 targets are established. Designed to provide the alternator voltage regulator function with limited use of additional components, the TC80310 system-on-a-chip also optimizes the alternator charging system phase, according to Freescale.

Developed in conjunction with automotive alternator manufacturers, the TC80310 uses Freescale's versatile SMARTMOS mixed-signal processing technology that combines analog, digital and power circuitry. Twenty one-time programmable memory functions supports reduced energy consumption.

"The LIN-controlled alternator regulator's design satisfies automotive requirements for standard components while providing our customers custom design functionality," said Gavin Woods, vice president and general manager of Freescale's Analog, Mixed-Signal & Power Division. "With this single programmable chip, a charging system designer can select the parameters that provide the greatest efficiency improvements in the application."

The key features include:

1. Default regulation voltage from 10.6V up to 16V uses to control the battery regulation voltage and     battery life.
2. The charging system achieves faster response time once the load response control (LRC) disable      frequency is achieved.
3. LRC eliminates engine speed hunting and vibration resulting from sudden increases in electrical     loads that cause abrupt torque loading of the engine at low RPM.
4. LIN commands vary the LRC rate and disable frequency for optimum performance.

Additional TC80310 features:
Integrated high side excitation driver (field);
Internal free wheeling diode;
Rotor excitation coil up to 8.0A;
Thermal protection;
Thermal compensation to avoid thermal runaway;
LIN 1.3 interface;
Rotor control and die temperature monitoring via LIN communication;
Self-start operation available in case of LIN disconnection;
Multiple adjustments capability for loop regulation.

Pricing and Availability:
TC80310 device and wafer samples are available now. The TC80310 devices are supported by comprehensive design tools, including evaluation boards, graphic user interfaces and software upon request. Devices are one-time programmable and available in die only.
For more information about Freescale's automotive portfolio, visit www.freescale.com

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