TLI4971A025T5E0001XUMA1

TLI4971 high precision coreless current sensor for industrial applications in 8x8mm SMD package Features & Benefits Description  Integrated current rail with typical 220µΩ insertion resistance enables ultra-low power loss  Less than 1nH parasitic inductance of integrated current rail enables wide bandgap design  Bandwidth of 240kHz enables wide range of applications  8x8mm form factor  Very low sensitivity error over temperature  Galvanic functional isolation up to 1150V  VISO 3500V RMS agency type-tested for 60 seconds per UL1577  Differential sensing principle  Two independent ultrafast Over Current Detection outputs 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 and general purpose inverters. The differential measurement principle allows great stray field suppression for operation in harsh environments. Two separate interface pins (OCD) provide a fast 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. All user-programmable parameters such as OCD thresholds, blanking times and output configuration modes are stored in an embedded EEPROM memory. s Coreless current sensor in PG-TISON-8 package Order Information Product Name Product Type Marking Ordering Code Package TLI4971-A120T5-U-E0001 120A measurement range, UL certified device 1)2) H71I1A1UH SP005272936 PG-TISON-8 TLI4971-A120T5-E0001 120A measurement range 1)2) H71I1A1_H SP005344532 PG-TISON-8 TLI4971-A075T5-U-E0001 75A measurement range, UL certified device 1)2) H71I3A1UH SP005446655 PG-TISON-8 TLI4971-A075T5-E0001 75A measurement range 1)2) H71I3A1_H SP005446653 PG-TISON-8 TLI4971-A050T5-U-E0001 50A measurement range, UL certified device 1)2) H71I4A1UH SP005446651 PG-TISON-8 TLI4971-A050T5-E0001 50A measurement range 1)2) H71I4A1_H SP005446648 PG-TISON-8 TLI4971-A025T5-U-E0001 25A measurement range, UL certified device 1)2) H71I6A1UH SP005446646 PG-TISON-8 TLI4971-A025T5-E0001 25A measurement range 1)2) H71I6A1_H SP005446644 PG-TISON-8 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 Rev. 1.30 01-12-2021 TLI4971 Datasheet Pin Configuration Pin configuration IPN Pin No. + -7 8 6 3 2 5 4 1 1 Symbol VDD 2 GND 3 VREF 4 AOUT 5 OCD1 6 OCD2 7 IP- 8 IP+ 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. 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  General purpose inverters  PV inverters  Chargers  Current monitoring  Overload and over-current detection 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 Rev. 1.30 01-12-2021 TLI4971 Datasheet General Description The current flowing through the current rail on the primary side induces a magnetic field that is differentially measured by two Hall probes. The differential measurement principle of the magnetic field combined with the current rail design provides superior suppression of any ambient magnetic stray fields. A high performance amplifier combines the signal resulting from the differential field and the internal compensation information provided by the temperature and stress compensation unit. Finally the amplifier output signal is fed into a differential output amplifier which is able to drive the analog output of the sensor. 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. Compared to the single-ended mode, the fully-differential mode enables doubling of the output voltage swing. In semi-differential mode a chip-internal reference voltage is used and provided on VREF (output). The current sensing information is provided in a single-ended way on AOUT. 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. All user-programmable parameters such as OCD thresholds, deglitching filter settings and output configuration mode 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). The interface is described in detail in the programming guide which can be found on the Infineon website. Please contact your local Infineon sales office for further documentation. Standard Product Configuration            The pre-configured full scale range is either set to ±120A, ±75A, ±50A or ±25A depending on the choosen product variant. The pre-configured output mode is set to semi-differential mode. The quiescent voltage is set to 1.65V. The OCD threshold of channel 1 is set to the factor 1.25 of the full scale range. The OCD threshold of channel 2 is set to the factor 0.82 of the full scale range. The pre-defined setting of the OCD deglitching filter time is set to 0µs. The sensor is pre-configured to work in the non-ratiometric mode. The sensitivity and the derived measurement range (full scale) can be reprogrammed by user according to the sensitivity ranges listed in Table 4. The sensor can be reprogrammed into single-ended operating mode or fully-differential mode by user without any recalibration of the device. The OCD thresholds and filter settings can be reprogrammed by the user according to the values listed in Table 6 and Table 7. For semi-differential uni-directional mode or ratiometric output sensitivity, please contact your local Infineon sales office. Datasheet 3 Rev. 1.30 01-12-2021 TLI4971 Datasheet Block Diagram The current flowing through the current rail on the primary side induces a magnetic field, which is measured by two Hall probes differentially. The differential measurement principle provides superior suppression of any ambient magnetic stray fields. A high performance amplifier combines the signal resulting from the differential field and the compensation information, provided by the temperature and stress compensation unit. Finally the amplifier output signal is fed into a differential output amplifier, which is able to drive the analog output of the sensor. VDD Infrastructure (power, clk, references) IP+ Integrated current rail Differential Hall plate EEPROM Bias signal f or Diagnosis Mode Diff. Hall GND Referen ces OCD1 OCD2 Signal Cond itioning AOUT VREF Temp MUX Stress Output Offset IP- Figure 2 Block Diagram Datasheet 4 Rev. 1.30 01-12-2021 TLI4971 Datasheet Absolute Maximum Ratings Table 1 Absolute Maximum Ratings General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C Note / Parameter Symbol Min Typ Max Unit Test Condition Supply voltage VDD -0.3 3.3 3.6 V Primary nominal rated current LF1) IPNRLF -70 - 70 A Peak, frequency < 10Hz Primary nominal rated current HF1) IPNRHF -70 - 70 A RMS, frequency ≥ 10Hz Primary current IPNS -250 - 250 A Single peak for 10µs, 10 assertions per lifetime Voltage on interface pins VREF, OCD1, AOUT VIO -0.3 - VDD + 0.3 V VIO_OCD2 -0.3 - 21 V VESD_HBM -2 - 2 kV VESD_SYS -16 - 16 kV ΔV/dt - - 10 V/ns Tj_max - - 130 °C TA_STORE -40 - 130 °C LT 15 - - Voltage on Interface pin OCD2 ESD voltage2) ESD voltage 3) Voltage slew-rate on current rail Maximum junction temperature Storage temperature Life time 1) 2) 3) In the application circuit Full voltage range Considering continuous Years operation with TS = 70°C and I = 30 ARMS Tested with primary nominal rated current of 70A peak on Infineon reference PCB at Low Frequency (LF). Thermal equilibrium reached after 2 min. Human Body Model (HBM), according to standard AEC-Q 100-002 According to standard IEC 61000−4−2 electrostatic discharge immunity test Stress above the limit values listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Maximum ratings are absolute ratings. Exceeding only one of these values may cause irreversible damage to the integrated circuit. Datasheet 5 Rev. 1.30 01-12-2021 TLI4971 Datasheet Product Characteristics Table 2 Operating Ranges General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C Parameter Symbol Min. Typ. Max. Unit Note / Test Condition Supply voltage VDD 3.1 3.3 3.5 V Ambient temperature at Measured at TS -40 105 °C soldering point soldering point Capacitance on analog W/o decoupling resistor, including CO 4.7 6.8 8 nF output pin parasitic cap on the board Capacitor on VDD CVDD 220 nF Reference input voltage VREF - 1.65 - V Reference input voltage variation VREF_var -10 - 10 % EEPROM programming voltage VIO_PRG 20.5 - 21.0 V Default value is semi-differential mode. Other values available by EEPROM: 1.2V, 1.5V, 1.8V Table 3 Operating Parameters General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C Parameter Symbol Min. Typ. Max. Unit Note / Test Condition Current consumption IDD 18 25 mA I(AOUT) = 0mA 25°C, when soldered on PCB with Primary path resistance RPN 220 µΩ 140µm copper thickness Power-on delay time tPOR Voltage on interface pin VIO_OCD1 OCD1 Voltage on interface pin VIO_OCD2 OCD2 Voltage on analog output VAOUT AOUT Undervoltage/overvoltage tUVLOe lockout delay - 1.0 1.5 ms -0.3 - 3.5 V -0.3 - 3.5 V -0.3 - VDD + 0.3 V 1 2.4 3 µs - 0.25 - From VDD rising above VDD(min) to full operation. 0A primary input current. In functional mode Enabled to disabled Current rail to soldering point, on Infineon Thermal resistance1) RTHJS K/W reference PCB (see related application note AppNote TLI4971 PCB) 1) Not subject to production test. Verified by design and characterization. Datasheet 6 Rev. 1.30 01-12-2021 TLI4971 Datasheet Functional Output Description The sensitivity in the fully-differential mode can be generally expressed as: The analog output signal depends on the selected output mode:  Single-ended  Fully-differential  Semi-differential 𝑆(𝑉𝐷𝐷 )𝑑𝑖𝑓𝑓 = 𝑆(3.3𝑉)𝑑𝑖𝑓𝑓 ∙ In this mode, the quiescent voltages and the sensitivity are both ratiometric with respect to VDD if ratiometricity is enabled. Single-Ended Output Mode Semi-Differential Output Mode In single-ended mode VREF is used as an input pin to provide the analog reference voltage, VREF. The voltage on AOUT, VAOUT, is proportional to the measured current IPN at the current rail: In semi-differential output mode, the sensor is using a chip-internal reference voltage to generate the quiescent voltage that is available on pin VREF (used as output). 𝑉𝐴𝑂𝑈𝑇 (𝐼𝑃𝑁 ) = 𝑉𝑂𝑄 + 𝑆 ∙ 𝐼𝑃𝑁 The analog measurement result is available as single-ended output signal on AOUT. The dependence of sensitivity and output offset on reference voltage is the same as described in singleended output mode. The quiescent voltage VOQ is the value of VAOUT when IPN=0. VOQ tracks the voltage on VREF 𝑉𝑂𝑄 (𝑉𝑅𝐸𝐹 ) = 𝑉𝑅𝐸𝐹 The reference voltage can be set to different values which allow either bidirectional or uniderictional current sensing. The possible values of VREFNOM are indicated in Table 2. The quiescent voltage is programmable at 3 different values, VOQbid_1 and VOQbid_2 for bidirectional current and VOQuni for unidirectional current (see Table 4). The sensitivity is by default non ratiometric to VREF. If ratiometricity is activated the sensitivity becomes as follows: 𝑆(𝑉𝑅𝐸𝐹 ) = 𝑆(𝑉𝑅𝐸𝐹𝑁𝑂𝑀 ) ∙ 𝑉𝐷𝐷 3.3𝑉 Total error distribution Figure 3 shows the total output error at 0h (ETOTT) and over lifetime (ETOTL) over the full scale range for sensitivity range S1 (10mV/A). 𝑉𝑅𝐸𝐹 𝑉𝑅𝐸𝐹𝑁𝑂𝑀 Fully-Differential Output Mode Current [%FS] -100 -75 Error [%FS] In fully-differential output mode, both VREF and AOUT are analog outputs to achieve double voltage swing: AOUT is the non-inverting output, while VREF is the inverting output: 𝑉𝐴𝑂𝑈𝑇 (𝐼𝑃𝑁 ) = 𝑉𝑄𝐴𝑂𝑈𝑇 + 𝑆 ∙ 𝐼𝑃𝑁 𝑉𝑅𝐸𝐹 (𝐼𝑃𝑁 ) = 𝑉𝑄𝑅𝐸𝐹 − 𝑆 ∙ 𝐼𝑃𝑁 -50 -25 0 25 50 75 100 3.5 3 2.5 2 Lifetime error 1.5 Temperature error 1 0.5 Initial error 0 -0.5 -1 -1.5 -2 The quiescent voltage is derived from the supply pins VDD and GND and has the same value on both AOUT and VREF: -2.5 -3 -3.5 Figure 3 Distribution of max. total error in S1 range 𝑉𝐷𝐷 𝑉𝑄𝐴𝑂𝑈𝑇 (𝑉𝐷𝐷 ) = 𝑉𝑄𝑅𝐸𝐹 (𝑉𝐷𝐷 ) = 2 Datasheet 7 Rev. 1.30 01-12-2021 TLI4971 Datasheet Table 4 Analog Output Characteristics General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C Parameter Symbol Min Typ Max Unit Quiescent output voltage (bidirectional option 1)1)2) VOQbid_1 - VDD/2 - V Quiescent output voltage (bidirectional option 2)2) VOQbid_2 - 1.5 - V Quiescent output voltage (unidirectional mode)2) VOQuni - VDD/5.5 - V Sensitivity, range11)2)3) Note / Test conditions IPN = 0A; fullydifferential or semidifferential (bidirectional) modes, standard setting IPN = 0A; semidifferential (bidirectional) mode; for this option the ratiometricity offset is disabled IPN = 0A; semidifferential (unidirectional) mode S1 - 10 - mV/A ±120A FS (Full Scale) Sensitivity, range2 2)3) S2 - 12 - mV/A ±100A FS Sensitivity, range3 2)3) S3 - 16 - mV/A ±75A FS Sensitivity, range42)3) S4 - 24 - mV/A ±50A FS Sensitivity, range5 2)3) S5 - 32 - mV/A ±37.5A FS Sensitivity, range6 2)3) S6 - 48 - mV/A ±25A FS Sensitivity ratiometry factor KS - 1 - - Quiescent ratiometry factor Analog output drive capability KOQ - 1 - - IO -2 - 2 mA VSAT - 150 300 mV BW 120 240 - kHz φdelay - - 48 ° Analog output saturation voltage Transfer function cutoff frequency Output phase delay4) Output Noise density5)6) External Homogenous magnetic field suppression4) INOISE - 350 - µA/√Hz BSR 34 40 - dB DC current VDD-VAOUT; Output current = 2mA -3dB criterion, CO = 6.8nF fsignal = 120kHz Referenced to Input current, typical value is at 25°C. Higher noise is present at higher temperatures. Frequency up to 150kHz. Up to 20mT homogeneous field applied 1) Pre-configured setting, for other pre-configured versions please contact your local sales. 2) Can be programmed by the user (valid only for 120A version). 3) Values refer to semi-differential mode or single-ended mode, with VREF =1.65 V. In fully-differential mode the sensitivity value is doubled. 4) Not subject to production test. Verified by design and characterization. 5) Typical value in fully-differential mode, sensitivity range S6 𝑂𝑢𝑡𝑝𝑢𝑡 𝑁𝑜𝑖𝑠𝑒 [𝑉𝑅𝑀𝑆 ] 1 6) 𝑁𝑜𝑖𝑠𝑒 𝐷𝑒𝑛𝑠𝑖𝑡𝑦 = ∗ 𝑉 𝜋 √ Datasheet 2 ∗ 𝐵𝑊[𝐻𝑧] 𝑆𝑒𝑛𝑠𝑖𝑡𝑖𝑣𝑖𝑡𝑦[ ] 𝐴 8 Rev. 1.30 01-12-2021 TLI4971 Datasheet Table 4 Analog Output Characteristics (cont’d) General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C Parameter Symbol Min Typ Max Unit Note / Test conditions Sensitivity error (all ESENS -1.4 1.4 % TS = 25°C, 0h, ±3σ ranges) -2.1 2.1 % TS = -40°C to 25°C, 0h, ±3σ Sensitivity error (all ESENST ranges) over temperature -1.5 1.5 % TS = 25°C to 105°C, 0h, ±3σ Sensitivity error (all ranges) over temperature and lifetime4) Output offset (all ranges) ESENSL -3 - 3 % EOFF -200 - 200 mA TS = 25°C, 0h, ±3σ -200 - 200 mA TS = -40°C to 25°C, 0h, ±3σ -250 - 250 mA TS = 25°C to 105°C, 0h, ±3σ Output offset (all ranges) over temperature EOFFT Output offset (all ranges) over temperature and lifetime4) EOFF_L -500 - 500 mA Total error (S1) ETOT_S1 -1.6 - 1.6 % TS = 25°C, 0h, ±3σ, includes linearity error -2.3 - 2.3 % TS = -40°C to 25°C, 0h, ±3σ, includes linearity error Total error (S1) over temperature ETOT_S1 Total error (S6) ETOT_S6 Total error (S6) over temperature Total error over temperature and lifetime4) -1.7 - 1.7 % -1.7 - 1.7 % -2.3 - 2.3 % -2.0 - 2.0 % -3.45 - 3.45 % ETOT_S6 ETOTL TS = 25°C to 105°C, 0h, ±3σ, includes linearity error TS = 25°C, 0h, ±3σ, includes linearity error TS = -40°C to 25°C, 0h, ±3σ, includes linearity error TS = 25°C to 105°C, 0h, ±3σ, includes linearity error Percentage of FS, sensitivity S1; includes sensitivity, offset and linearity error 4) Not subject to production test. Verified by design and characterization. Datasheet 9 Rev. 1.30 01-12-2021 TLI4971 Datasheet OCD thresholds Fast Over-Current Detection (OCD) The Over-Current Detection (OCD) function allows fast detection of over-current events. The raw analog output of the Hall probes is fed directly into comparators with programmable switching thresholds. A user programmable deglitch filter is implemented to enable the suppression of fast switching transients. The two different open-drain OCD pins are active low and can be directly combined into a wired-AND configuration on board level to have a general over-current detection signal. TLI4971 supports two independent programmable OCD outputs, suited for different application needs. The OCD pins are providing a very fast response, thanks to independence from the main signal path. They can be used as a trap functionality to quickly shut down the current source as well as for precise detection of soft overload conditions. OCD pins external connection The OCD pins can be connected to a logic input pin of the microcontroller and/or the gate-driver to quickly react to over-current events. They are designed as open-drain outputs to easily setup a wired-AND configuration and allow monitoring of several current sensors outputs via only one microcontroller pin. The symmetric threshold level of the OCD outputs is adjustable and triggers an over-current event in case of a positive or negative over-current. The possible threshold levels are listed in Table 6 and Table 7. The instruction for the settings is documented in the TLI4971 programming guide. OCD outputs timing behavior Both output pins feature a deglitch filter to avoid false triggers by noise spikes on the current rail. Deglitch filter settings can be programmed according to application needs. Available options are listed in Table 6 and Table 7. Figure 4 shows the OCD output pin typical behavior during an over-current event. Over-current Pulse 1: duration exceeds the overcurrent response time tD_OCDx + response time jitter ΔtD_OCDx + deglitch filter time tdeglitch. The OCD output voltage is set low until the current value drops below the OCD threshold. Over-current Pulse 2: duration does not exceed the over-current response time tD_OCDx and therefore no OCD event is generated. Over-current Pulse 3: duration exceeds the response time tD_OCDx + response time jitter ΔtD_OCDx, but does not exceed the glitch filter time tdeglitch and no OCD event is generated. B 2 x B THR BTHR 1 2 3 t Glitch counter threshold t ΔtD_OCDx VOCD VDD 0.5 x V DD tD_OCDx tdeglitch ΔtD_OCDx tD_OCDx tOCD_low tD_OCDx tOC < (tD_OCDx + ΔtD_OCDx) tdeglitch t ΔtD_OCDx tOC < (tD_OCDx + ΔtD_OCDx + tdeglitch) Figure 4 Fast over-current detection output timing Datasheet 10 Rev. 1.30 01-12-2021 TLI4971 Datasheet Fast Over-Current Detection (OCD) Output Parameters Table 5 Common OCD Parameters General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C, CL=1nF, RPU=4.7kΩ Parameter Symbol Min Typ Max Unit Note / Test Conditions 1) Threshold level tolerance ITHT -10 10 % At 3σ, Irail=2xITHRx.x, input Response time jitter1) ΔtD_OCD 0.25 µs rise time 0.1µs Deglitch filter basic time tOCDgl 400 500 600 ns Detection minimum time Load capacitance Open-drain current Pull-up resistor tOCD_low 3 - - µs Valid for both OCDs CL - - 1 nF IOD_ON - - 1 mA DC current RPU 1 4.7 10 kΩ To VDD 1) Not subject to production test. Verified by design and characterization. Table 6 OCD1 Parameters Parameter Symbol Min Typ Max Unit Threshold level - Level11)2) 3) ITHR1.1 - 1.25 - x IFSR Threshold level - Level21)2) Threshold level - Level31)2) Threshold level - Level41)2) Threshold level - Level51)2) Threshold level - Level61)2) Threshold level - Level71)2) Threshold level - Level81)2) ITHR1.2 ITHR1.3 ITHR1.4 ITHR1.5 ITHR1.6 ITHR1.7 ITHR1.8 - 1.39 1.54 1.68 1.82 1.96 2.11 2.25 - x IFSR x IFSR x IFSR x IFSR x IFSR x IFSR x IFSR Response time4) tD_OCD1 - 0.7 1 µs Fall time5) tf_OCD1 - 100 150 ns OCD1gl_mul 0 - 7 - Deglitch filter setting2)6) Note / Test Conditions Factor with respect to IFS (IFS = current full scale according to programming i.e. 120A) Factor with respect to IFS Factor with respect to IFS Factor with respect to IFS Factor with respect to IFS Factor with respect to IFS Factor with respect to IFS Factor with respect to IFS IPN = 2*ITHR1.x tdeglitch = OCD1gl_mul*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 OCD1-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%. Datasheet 11 Rev. 1.30 01-12-2021 TLI4971 Datasheet Table 7 OCD2 Parameters Parameter Symbol Min Typ Max Unit Threshold level - level11)2) ITHR2.1 - 0.5 - x IFSR Threshold level - level21)2) ITHR2.2 - 0.61 - x IFSR Note / Test Conditions Factor with respect to IFS (IFS = current full scale according to programming i.e. 120A) 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 1)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 - level7 1)2) ITHR2.7 - 1.14 - x IFSR Factor with respect to IFS Threshold level - level8 1)2) ITHR2.8 - 1.25 - x IFSR Factor with respect to IFS tD_OCD2 - 0.7 1.2 µs tf_OCD2 - 200 300 ns OCD2gl_mul 0 - 15 - Threshold level - level5 Response time4) Fall time 5) Deglitch filter setting2)6) IPN = 2 x ITHR2.x 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 TLI4971 is able to detect undervoltage or overvoltage condition of its own power supply (VDD). When an undervoltage (VDDOVLOH) 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 8 Undervoltage / Overvoltage parameters General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C Parameter Symbol Min. Typ. Max. Unit Note / Test Condition Supply undervoltage lockout threshold UVLOH_R - - 3 V VDD at rising edge Supply undervoltage lockout threshold UVLOH_F 2.5 - - V VDD at falling edge OVLOH 3.55 - - V VDD at rising edge VDD,OCD 1.8 - - V For VDD