TLE8082ES datasheet(23/61 Pages) INFINEON

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Power supply and voltage monitoring function

5.1

Supply functions

The TLE8082ES implements:

•

one internal charge pump

•

one pre-regulator controlling an external n-channel MOSFET

•

one 5 V sensor supply with reverse supply protection

•

one 5 V communication supply

5.1.1

V5VI supply input

The V5VI supply input is used as reference voltage for the 5 V sensor and 5 V communication supply.

Additionally, it supplies the SPI output buffer and power stage gate drivers.

The 5 V main supply of the electronic control unit (ECU) has to be connected to the pin V5VI.

5.1.2

Charge pump

An internal charge pump is implemented for low drop operation. An external capacitor at CP pin must be

connected to AGND.

5.1.3

6.5V Pre-regulator with external MOSFET

The pre-regulator regulates the voltage at pin V6VI to Pre-regulator output voltage via the gate voltage of

an external n-channel MOSFET. In normal operation, the maximum output level of pin VG is defined by Pre-

regulator voltage drop VS to VG - normal operation and Pre-regulator delta voltage VG to VS - low battery.

The drain of the external MOSFET and the pin VS are connected to the same supply node, normally battery

supply.

The function of the pre-regulator is verified with Infineon MOSFET IPD30N06S2L-23.

For stable operation and ripple reduction capacitors are recommended at pin V6VI, pin VG, and pin CP.

5.1.4

5 V Sensor supply

The output T5V of the 5 V sensor supply follows the voltage level at pin V5VI. The sensor supply is supplied out

of pin V6VI.

The output is protected against overload (e.g short to GND) and overtemperature. In case of an overcurrent, the

output current is limited and the diagnosis bit is set. The diagnosis bit is cleared with a readout of register

DIAG0 if no overcurrent is present anymore.

The output is protected against reverse supply to pin V6VI.

The 5 V sensor supply is designed for low battery operation (see Sensor supply low drop resistance).

The 5 V sensor supply can be deactivated through SPI configuration of bit COM5VEN in the CONFIG register.

A capacitor at the pin T5V is recommended for stable operation and ripple reduction.

TLE8082ES

Small engine management IC

Power supply and voltage monitoring function

Datasheet

Rev. 1.0

2021-03-23

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