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Alternator regulator goes fully-integrated

Posted: 30 May 2011 ?? ?Print Version ?Bookmark and Share

Keywords:alternator regulator? integrated circuit?

Freescale Semiconductor Inc. has released the TC80310, a single-chip alternator regulator IC that integrates local interconnect network (LIN) for improved control and energy use.

According to Freescale, the alternator regulator has an energy-saving architecture of a single-wire LIN connection to the vehicle's engine control unit (ECU). Further, the TC80310 system-on-a-chip optimizes the alternator charging system phase.

Developed for some automotive alternator manufacturers, Freescale said TC80310 uses its SMARTMOS mixed-signal processing technology that combines analog, digital and power circuitry.

The alternator regulator's 20 one-time programmable memory functions allow alternator developers to optimize the chip for improved efficiency and 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, Freescale vice president and general manager for analog, mixed-signal and power division.

"With this single programmable chip, a charging system designer can select the parameters that provide the greatest efficiency improvements in the application," Woods added.

One of the IC's programmable features is the default regulation voltage of 10.6V up to 16V that is set during final test. The default voltage is the value alternator manufacturer uses to control the battery regulation voltage.

Freescale said the charging system achieves faster response time once the load response control (LRC) disable frequency is achieved. 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. LIN commands vary the LRC rate and disable frequency for optimum performance.

Other TC80310 features are integrated high side excitation driver; internal free wheeling diode; rotor excitation coil up to 8.0A; thermal protection; thermal compenzation 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; and multiple adjustments capability for loop regulation.

The TC80310 devices, which are one-time programmable and only available in die, come with design tools, including evaluation boards, graphic user interfaces and software upon request.

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