Datasheet

3

Revision 1.02

19-08-2022

TLE4971

Datasheet

Block Diagram

Infrastructure

(power, clk, references)

Diff. Hall

MUX

Temp

Stress

Output

Offset

EEPROM

References

Signal

Conditioning

IP+

IP-

Integrated

current

rail

Differential

Hall Plate

Bias signal for

Diagnosis Mode

VDD

GND

OCD1

OCD2

AOUT

VREF

Figure 2 Block Diagram

General Description

TLE4971 is a high speed precision current sensor. Due to implemented EEPROM various configuration can

be applied without using any external components.

Depending on the selected programming option, the analog output signal can be provided either as:

•

Single-ended

•

Fully-differential

•

Semi-differential

In single-ended mode, the pin VREF is used as a reference voltage input. The analog output signal is

provided on pin AOUT.

In fully-differential mode, both AOUT (positive polarity) and VREF (negative polarity) are used as signal

outputs whereas VDD is used as reference voltage input.

In semi-differential mode a chip-internal reference voltage is used and provided on VREF (output).

For fast over-current detection, the raw analog signal provided by the Hall probes is fed into comparators

with programmable switching thresholds.

A user-programmable deglitch filter is implemented to enable the suppression of fast switching transients.

The open-drain outputs of the OCD pins are active “low” and they can be directly combined into a wired-

AND configuration on board level to have a general over-current detection signal.

Programming of the memory can be performed in circuit through a Serial Inspection and Configuration

Interface (SICI). The interface is descripded in detail in the programming guide which can be found on the

Infineon webside.