Datasheet

11

Revision 1.02

19-08-2022

TLE4971

Datasheet

Table 8 OCD2 Parameters

Parameter

Symbol

Min

Typ

Max

Unit

Note / Test Conditions

Threshold level - level11)2)

ITHR2.1

-

0.5

-

x IFSR

Factor with respect to IFS

(IFS = current full scale

according to programming

i.e. 120A)

Threshold level - level21)2)

ITHR2.2

-

0.61

-

x IFSR

Factor with respect to IFS

Threshold level - level31)2)

ITHR2.3

-

0.71

-

x IFSR

Factor with respect to IFS

Threshold level - level41)2)3)

ITHR2.4

-

0.82

-

x IFSR

Factor with respect to IFS

Threshold level - level51)2)

ITHR2.5

-

0.93

-

x IFSR

Factor with respect to IFS

Threshold level - level61)2)

ITHR2.6

-

1.04

-

x IFSR

Factor with respect to IFS

Threshold level - level71)2)

ITHR2.7

-

1.14

-

x IFSR

Factor with respect to IFS

Threshold level - level81)2)

ITHR2.8

-

1.25

-

x IFSR

Factor with respect to IFS

Response time4)

tD_OCD2

-

0.7

1.2

µs

IPN = 2 x ITHR2.x

Fall time5)

tf_OCD2

-

200

300

ns

Deglitch filter setting2)6)

OCD2gl_mul

0

-

15

-

tdeglitch = OCD2gl_mul x tOCDgl

pre-configured setting = 0

1) Symmetric threshold level for positive and negative currents.

2) Can be programmed by user.

3) Pre-configured threshold level.

4) Time between primary current exceeding current threshold and falling edge of OCD2-pin at 50%.

5) Not subject to production test. Verified by design and characterization.

6) The specified deglitching timing is valid when input current step overtakes the threshold of at least 10%.

Undervoltage / Overvoltage detection

TLE4971 is able to detect undervoltage or overvoltage condition of its own power supply (VDD). When an

undervoltage (VDD<UVLOH) or overvoltage (VDD>OVLOH) condition is detected both OCD pins are pulled down in order

to signal such a condition to the user.

The undervoltage detection on OCD pins is performed only if VDD > VDD,OCD.

Both OCD pins are pulled down at start up. When VDD exceeds the undervoltage threshold UVLOH_R and the power

on delay time tPOR has been reached, the sensor indicates the correct functionality and high accuracy by releasing

the OCD pins.

Table 9 Operating Parameters

General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +125°C

Parameter

Symbol

Min.

Typ.

Max.

Unit Note / Test Condition

Supply undervoltage

lockout threshold

UVLOH_R

-

-

2.9

V

VDD at rising edge

Supply undervoltage

lockout threshold

UVLOH_F

2.5

-

-

V

VDD at falling edge

Supply overvoltage lockout

threshold

OVLOH

3.55

-

-

V

VDD at rising edge

OCD undervoltage

detection limit

VDD,OCD

1.8

-

-

V

For VDD<VDD,OCD undervoltage may not be

performed.

Undervoltage/overvoltage

lockout delay

tUVLOe

1

2.4

3.1

µs

Enabled to disabled

1) Not subject to production test. Verified by design and characterization.