AR6000 datasheet(12/103 Pages) NXP

12 / 103 page

NXP Semiconductors

AR6000

Alternator regulator with LIN

AR6000

All information provided in this document is subject to legal disclaimers.

Data sheet: advance information

Rev. 5.1 — 12 October 2017

12 / 103

9.2.3 Ground pin (GND)

The AR6000 has one GND pin.

9.2.4 Supply voltage (B+A)

The AR6000 is supplied by this B+A pin. This voltage is also used as the feedback

voltage by the regulation loop.

9.2.5 Excitation (EXC)

This pin is connected to the excitation coil (rotor) of the alternator. The IC supplies a

current via a high side driver to the rotor in order to control the output current of the

alternator when load varies so as to maintain battery voltage at defined set point.

10 Functional internal block description

10.1 Supply voltage: filter/divider, bandgap, POR

An input filter and divider provides an image of the battery voltage to the internal ADC,

which sends the converted value to the digital regulation loop circuit.

The supply block provides the voltages for the internal blocks of the AR6000.

• Main logic

• All analog blocks (in wake-up and in standby modes)

• LIN transceiver

• Charge pump

The purpose of the POR block is to generate a clean reset to the main logic. When a

Power-On-Reset occurs, device internal registers are reset and the device goes into

stand by mode.

The Bandgap block provides the voltage and current references for the other blocks.

10.2 Power stage: charge pump, drive and protection, current

measurement

The power stage of the circuit consists of the gate driver with a charge pump and

protection to control the internal N-channel power MOSFET switching a high-side driver.

A short-circuit is instantaneously detected and the excitation current is turned off until the

next regulation cycle. A freewheeling diode is inserted between the EXC and GND pins,

across the excitation coil for the energy recirculation.

The current measurement block provides a value of the excitation current flowing in the

high-side switch. The tolerance of the current value is defined according to Figure 7.

AR6000 Datasheet(PDF) 12 Page - NXP Semiconductors