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1 Features

? AEC-Q100 qualified for automotive applications

– Temperature grade 1: –40°C to 125°C, TA

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? High continuous current capability: 80ARMS

? Robust reinforced isolation

? High accuracy

– Sensitivity error: ±0.1%

– Sensitivity thermal drift: ±20ppm/°C

– Sensitivity lifetime drift: ±0.2%

– Offset error: ±0.2mV

– Offset thermal drift: ±2μV/°C

– Offset lifetime drift: ±0.2mV

– Non-linearity: ±0.1%

? High immunity to external magnetic fields

? Precision zero-current reference output

? Fast Response

– Signal bandwidth: 500kHz

– Response time: 250ns

– Propagation delay: 60ns

– Overcurrent detection response: 100ns

? Operating supply range: 3V to 5.5V

? Bidirectional and unidirectional current sensing

? Multiple sensitivity options:

– Ranging from 15mV/A to 150mV/A

? Safety related certifications (planned)

– UL 1577 Component Recognition Program

– IEC/CB 62368-1

2 Applications

? Onboard charger

? DC/DC converter

? Rotor excitation

? HVAC compressor

? High-voltage PDU

? EV charging

3 Description

The TMCS1126-Q1 is a galvanically isolated Halleffect

current sensor with industry leading isolation

and accuracy. An output voltage proportional to the

input current is provided with excellent linearity and

low drift at all sensitivity options. Precision signal

conditioning circuitry with built-in drift compensation is

capable of less than 1.4% maximum sensitivity error

over temperature and lifetime with no system level

calibration, or less than 0.9% maximum sensitivity

error including both lifetime and temperature drift with

a one-time calibration at room temperature.

AC or DC input current flows through an internal

conductor generating a magnetic field measured

by integrated, on-chip, Hall-effect sensors. Coreless

construction eliminates the need for magnetic

concentrators. Differential Hall sensors reject

interference from stray external magnetic fields. Low

conductor resistance increases measurable current

ranges up to ±103A while minimizing power loss and

easing thermal dissipation requirements. Insulation

capable of withstanding 5kVRMS, coupled with a

minimum of 8mm creepage and clearance, provides

high levels of reliable lifetime reinforced working

voltage. Integrated shielding enables excellent

common-mode rejection and transient immunity.

Fixed sensitivity allows the device to operate from a

single 3V to 5.5V power supply, eliminating ratiometry

errors and improving supply noise rejection. TI

provides the TMCS1126xxB-Q1 as a lower-cost

option.