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TLI4971 high precision coreless current sensor for industrial
applications in 8x8mm SMD package
Features & Benefits
Description
Integrated current rail with typical 225µΩ insertion resistance enables ultra-low power loss
Smallest form factor, 8x8mm SMD, for easy integration and board area saving
Single supply voltage, 3.1V to 3.5V
High accurate, scalable, DC & AC current sensing
Full scale up to ±120A
Bandwidth greater than 120kHz enables wide range of applications
Low phase delay (< 48° at below 120kHz) for easy closed loop control
Very low sensitivity error over temperature (< 2.5%)
Excellent stability of offset over temperature and lifetime
Integrated isolator provides high robustness to voltage slew rates up to 10V/ns
Galvanic functional isolation up to 1150V peak VIORM
VISO 2500V RMS agency type-tested for 60 seconds per UL1577
Partial discharge capability of at least 1200V
Differential sensor principle ensures superior magnetic stray field suppression
Two independent fast Over-Current Detection (OCD) pins with configurable thresholds enable protection mechanisms for power circuitry (typical 0.7µs)
TLI4971 is a high precision miniature coreless magnetic current sensor for AC and DC measurements with analog interface and two fast over-current detection outputs.
Infineon's well-established and robust monolithic Hall technology enables accurate and highly linear measurement of currents with a full scale up to ±120A. All negative effects (saturation, hysteresis)
commonly known from open loop sensors using flux concentration techniques are avoided. The sensor is equipped with internal self-diagnostic feature. Typical applications are electrical drives (up to
690V), current monitoring, chargers, photovoltaic inverters, general purpose inverters, overload and over-current detection. The digitally assisted analog concept of TLI4971 offers superior stability over temperature and
lifetime thanks to the proprietary digital stress and temperature compensation. The differential measurement principle allows great stray field
suppression for operation in harsh environments. The integrated primary conductor (current rail) with very low insertion resistance minimizes the power loss and enables miniaturization of sensing circuitry. A small 8mm x 8mm leadless package
Ratiometric and non ratiometric analog output
(QFN-like) allows for standard SMD assembly.
Fully calibrated
Two separate interface pins (OCD) provide a fast
s output signal in case a current exceeds a pre-set
threshold.
The sensor is shipped as a fully calibrated product
without requiring any customer end-of-line
calibration.
Nevertheless, the high configurability enables
individual customization for a wide variety of
applications. All user-programmable parameters
such as OCD thresholds, blanking times and output
configuration modes are stored in an embedded
EEPROM memory. Programming of the memory can
be performed in the application through a Serial
Inspection and Configuration Interface (SICI).
Coreless current sensor in PG-TISON-8 package
Order Information
Product Name
Product Type
Package
Ordering Number
TLI4971-A120T5-U-E0001 120A measurement range, UL certified device 1)2) PG-TISON-8 SP005272936
TLI4971-A120T5-E0001 120A measurement range 1)2)
PG-TISON-8 SP005344532
1) Current sensor for industrial / consumer applications, qualified according to AEC Q100 grade 2 2) Semi-differential mode, non-ratiometric output sensitivity
Datasheet www.infineon.com
Please read the Important Notice and Warnings at the end of this document
Revision 1.1 09-03-2020
TLI4971
Datasheet
Pin Configuration
IPN
7 6
8 5432
1
Figure 1 Pin layout PG-TISON-8-5
The current IPN is measured as a positive value when it flows from pin 8 (+) to pin 7 (-) through the integrated current rail.
Pin configuration Pin No. Symbol
1 VDD 2 GND 3 VREF 4 AOUT
5 OCD1
6 OCD2
7 IP8 IP+
Function
Supply voltage
Ground
Reference voltage input or output
Analog signal output
Over-current detection output 1 (open drain output) Over-current detection output 2 (open drain output) Negative current terminal pin (current-out) Positive current terminal pin (current-in)
Target Applications
The TLI4971 is suitable for AC as well as DC current measurement applications: Electrical drives Current monitoring Photovoltaic & general purpose inverters Overload and over-current detection Chargers etc.
Due to its implemented magnetic interference suppression, it is extremely robust when exposed to external magnetic fields. The device is suitable for fast over-current detection with a configurable threshold level. This allows the control unit to switch off and protect the affected system from damage, independently from the main measurement path.
Datasheet
2 Revision 1.1 09-03-2020
TLI4971
Datasheet
General Description
The current flowing through the current rail on the primary side i.