The TLI4970 is a highly accurate current sensor based on Infineon’s well established Hall
technology. The coreless concept allows significant miniaturization compared to exi -
sting products. It is a fully digital solution, easy to use, no need for external calibration.
Additionally a separate interface pin (OCD) provides a fast output signal in case the
current measured by the sensor exceeds a pre-defined threshold. The small QFN-like
package allows standard SMD assembly.
Product Highlights
AC & DC measurement range up to ±50A
Highly accurate over temperature range and lifetime (max. 1.0% (0 h),
1.6% (over lifetime) of indicated value)
Low oset error (max. 75mA over temperature and lifetime)
High magnetic stray field suppression
Fast over current detection with configurable threshold
Galvanic isolation up to 2.5kV max. rated isolation voltage (UL1577)
16-bit digital SPI output (13-bit current value)
Small 7.0 x 7.0 mm SMD package
The TLI4970 provides superior accuracy compared to existing open or closed loop systems
with magnetic cores. It has additional functionality such as over current detection, zero
crossing detection and programmable filters, but oers a significantly smaller footprint
and power consumption.
Applications
The TLI4970 is suitable for AC and DC current measurement applications like photovoltaic-
and general purpose inverters, Power Supplies (SMPS), battery chargers, lighting appli-
cations, electrical drives, and many more. With its implemented magnetic interference
suppression, it is extremely robust when exposed to external magnetic fields. It is also
suitable for fast over current detection with a configurable threshold level. This allows the
control unit to switch o and protect the aected system from damage, independently
of the main measurement path.
Galvanic isolated, measurement
principle
Coreless solution, hysteresis free
Inherent suppression of stray
magnetic field
13-bit current resolution
Update rate: 80kSPS
Galvanic isolation up to 2.5kV
Adjustable LP filter (≤ 18kHz)
Fast over current detection
(typ. 1.8µs) with configurable
threshold levels
Suitable for industrial and
consumer applications
Plug and play solution –
no external calibration needed
Long-term stability of output signal
Digital Interface
3 wire SPI
Digital OCD pin
Package
Leadless package (QFN-like)
PG-TISON-8
Size in mm: 7.0 x 7.0 x 1.0 (L, W, H)
Weight: 0.2g
SMD mounting
Product Brief
TLI4970 – Current Sensor Family
Miniature Magnetic Digital Current Sensor ±50A (AC/DC), up to ±1%, Digital SPI Interface
Sensor Features
www.infineon.com/current-sensor
Product Brief
Block Diagram TLI4970
Product Summary
VDD
MUX
T
S
Supply, Biasing,
Reset, Oscillator,
Bandgap
EEPROM
DSP Digital IF
DAC
ADC
ADC
Fast Overcurrent Detection (open-drain)
CS
GND
IP+
IP-
Galvanic
Separation SCLK
DOUT
OCD
Di.
Hall
Product Name Description Primary Current Range Max. Accuracy Error1) Order Code
TLI4970-D050T4 Qualified according to industrial standards:
For use in industrial and consumer applications
50A ±1.6 SP000917088
TLI4970-D050T5 50A ±3.5 Upcoming
TLI4970-D025T4 25A ±1.6 Upcoming
TLI4970-D025T5 25A ±3.5 Upcoming
TLE4970-D050T4 Qualified according AEC for automotive applications 50A ±1.6 On request
TLE4970-D025T4 25A ±1.6 Upcoming
1) Accuracy error includes temperature and lifetime dris
TLI4970 – Current Sensor Family
Miniature Magnetic Digital Current Sensor ±50A (AC/DC), up to ±1%, Digital SPI Interface
Published by
Infineon Technologies AG
85579 Neubiberg, Germany
© 2014 Infineon Technologies AG.
All Rights Reserved.
Visit us:
www.infineon.com
Order Number: B142-I0071-V1-7600-EU-EC-P
Date: 12 / 2014
Attention please!
The information given in this document shall in no event
be regarded as a guarantee of conditions or characteristics
(“Beschaenheitsgarantie”). With respect to any examples
or hints given herein, any typical values stated herein and/
or any information regarding the application of the device,
Infineon Technologies hereby disclaims any and all warran-
ties and liabilities of any kind, including without limitation
warranties of non-infringement of intellectual property
rights of any third party.
Information
For further information on technology, delivery terms and
conditions and prices please contact your nearest Infineon
Technologies Oice (www.infineon.com).
Warnings
Due to technical requirements components may contain
dangerous substances. For information on the types in
question please contact your nearest Infineon Technolo-
gies Oice. Infineon Technologies Components may only
be used in life-support devices or systems with the express
written approval of Infineon Technologies, if a failure of
such components can reasonably be expected to cause
the failure of that life-support device or system, or to aect
the safety or eectiveness of that device or system. Life
support devices or systems are intended to be implant-
ed in the human body, or to support and/or maintain and
sustain and/or protect human life. If they fail, it is reasonable
to assume that the health of the user or other persons may
be endangered.
