NXP Semiconductors

9

80310

5.2.2

LIN bus (BUS)

This LIN pin represents the single-wire bus transmitter and receiver. It is suited for automotive bus systems and is based on the LIN bus

specification v1.3.

5.2.3

Ground pins (PGND, SGND)

The 80310 has two different types of ground pins. The PGND pin is the power ground pin for the device. The SGND is the signal ground

pin.

Note: The PGND, the SGND pins must be connected together to a ground external to the device.

5.2.4

Supply voltage (B+A)

The 80310 is supplied by this B+A pin. This voltage is also used as the feedback voltage by the control circuit.

5.2.5

Excitation (EXC)

This pin is connected to the excitation coil (rotor) of the alternator. The IC supplies a current via a high-side MOSFET to the excitation

winding to create a magnetic filed in the rotor. This generates sinusoidal currents in the stator which are rectified by a diode bridge.

5.3

Functional internal block description

Figure 7. Functional internal block diagram

Bandgap

Integrated Supply

TC80310 - Functional Block Diagram

Logic & Control

A/D Converter

Supply Voltage

Logic& Control

Power

Clock

OTP

Digital

Die Temperature

Phase Low & High

Power Stage

Divider/Filter

POR

LIN

Charge Pump

Drive and

Protection

Current

Measurement