TLI4971-A120T5-U-E0001 [INFINEON]
TLI4971 high precision coreless current sensor for industrial applications in 8x8mm SMD package;型号: | TLI4971-A120T5-U-E0001 |
厂家: | Infineon |
描述: | TLI4971 high precision coreless current sensor for industrial applications in 8x8mm SMD package |
文件: | 总19页 (文件大小:1035K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
TLI4971 high precision coreless current sensor for industrial
applications in 8x8mm SMD package
Description
Features & Benefits
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.
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
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.
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
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
(QFN-like) allows for standard SMD assembly.
Two separate interface pins (OCD) provide a fast
output signal in case a current exceeds a pre-set
threshold.
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)
Ratiometric and non ratiometric analog output
Fully calibrated
s
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
Ordering
Number
Product Name
Product Type
Package
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
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TLI4971
Datasheet
Pin Configuration
Pin configuration
IPN
Pin No. Symbol Function
VDD
GND Ground
Reference voltage input or
output
Supply voltage
1
2
8
7
VREF
3
4
1
2
3
4
5
AOUT Analog signal output
6
Over-current detection
OCD1 output 1 (open drain
output)
Over-current detection
OCD2 output 2 (open drain
output)
5
6
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.
Negative current terminal
pin (current-out)
IP-
7
8
Positive current terminal
pin (current-in)
IP+
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.
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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 descripded in detail in the programming guide which can be
found on the Infineon webside. Please contact your local Infineon sales office for further documentation.
Standard Product Configuration
The pre-configured full scale range is set to ±120A with a sensitivity of 10mV/A.
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 1.68 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 0s.
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.
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Block Diagram
The current flowing through the current rail on the primary side induces a magnetic field, that 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
GND
Infrastructure
(power, clk, references)
IP+
Integrated
current rail
Bias signal for EEPROM
Diagnosis Mode
OCD1
OCD2
References
Differential
Hall plate
Diff.
Hall
Signal
Conditioning
AOUT
VREF
Temp
Stress
MUX
Output
Offset
IP-
Figure 2 Block Diagram
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Absolute Maximum Ratings
Table 1 Absolute Maximum Ratings
General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C
Note /
Test Condition
Parameter
Symbol Min Typ
Max
Unit
Supply voltage
VDD
-0.3
3.3
3.6
V
Peak, frequency < 10Hz.
Primary nominal rated
current LF1)
Tested on Infinenon reference
PCB (see related application
note: AppNote TLI4971 PCB)
RMS, frequency ≥ 10Hz.
IPNRLF
-70
-
70
A
Primary nominal rated
current HF2)
Tested on Infinenon reference
PCB (see related application
note: AppNote TLI4971 PCB)
IPNRHF
-70
-
-
70
A
A
Single peak for 10µs,
10 assertions per lifetime
Primary current
IPNS
-250
250
Voltage on interface pins
VREF, OCD1, AOUT
VIO
-0.3
-0.3
-
-
VDD + 0.3
21
V
V
Voltage on Interface pin
OCD2
VIO_OCD2
ESD voltage3)
ESD voltage4)
Voltage slew-rate on
current rail
Maximum junction
temperature
Storage temperature
VESD_HBM
VESD_SYS
-2
-
-
2
kV
kV
-16
16
In the application circuit
Considering continuous
ΔV/dt
-
-
10
V/ns
Tj_max
-
-
-
130
130
°C
°C
TA_STORE
-40
Life time
LT
15
-
-
Years operation with TS = 70°C
and I = 30 A RMS
1) Tested with primary nominal rated current of 70A peak on Infineon reference PCB at Low Frequency (LF).
Thermal equilibrium reached after 2 min.
2) Tested with primary nominal rated current of 70A rms on Infineon reference PCB at High Frequency (HF).
Thermal equilibrium reached after 2 min.
3) Human Body Model (HBM), according to standard AEC-Q 100-002
4) 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.
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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
soldering point
Measured at
soldering point
TS
-40
-
105
°C
Capacitance on analog
output pin
Capacitor on VDD
W/o decoupling resistor, including
parasitic cap on the board
CO
4.7
-
6.8
8
-
nF
CVDD
220
nF
Default value is
semi-differential mode.
Other values available by EEPROM:
Reference input voltage
VREF
-
1.65
-
V
1.2V, 1.5V, 1.8V
Reference input voltage
variation
VREF_var
-10
-
-
10
%
EEPROM programming
voltage
VIO_PRG 20.5
20.7
V
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
-
15
25
mA I(AOUT) = 0mA
25°C, when soldered on PCB with
140µm copper thickness
Primary path resistance
RPN
-
225
-
µΩ
From VDD rising above VDD(min) to full
operation. Output with lower accuracy is
available within 0.5 ms.
Power-on delay time
tPOR
-
-
1.5
ms
0A primary input current.
Voltage on interface pin
OCD1
Voltage on interface pin
OCD2
Voltage on analog output
AOUT
VIO_OCD1 -0.3
VIO_OCD2 -0.3
-
-
-
3.5
3.5
V
V
V
In functional mode
VDD at rising edge
VAOUT
-0.3
-
VDD + 0.3
Supply undervoltage
lockout threshold
UVLOH_R
-
-
3
-
V
V
Supply undervoltage
lockout threshold
UVLOH_F
2.5
VDD at falling edge
VDD at rising edge
Supply overvoltage
lockout threshold
OCD undervoltage
detection limit
Undervoltage/overvoltage
lockout delay
OVLOH
VDD,OCD
tUVLOe
3.55
1.8
1
-
-
-
-
V
V
For VDD<VDD,OCD undervoltage may not be
performed.
2.4
3
µs Enabled to disabled
Current rail to soldering point, on Infineon
reference PCB (see related application note
AppNote TLI4971 PCB)
Thermal resistance1)
RTHJS
-
-
0.6
K/W
1) Not tested in production. Proven by design and characterization.
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Functional Output Description
The analog output signal depends on the selected
output mode:
The sensitivity in the fully-differential mode can be
generally expressed as:
Single-ended
Fully-differential
Semi-differential
In this mode, the quiescent voltages and the
sensitivity are both ratiometric with respect to VDD
if ratiometricity is enabled.
Single-Ended 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:
Semi-Differential Output Mode
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).
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 single-
ended output mode.
The quiescent voltage VOQ is the value of VAOUT when
IPN=0. VOQ tracks the voltage on 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:
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).
Fully-Differential Output Mode
Current [%FS]
-100 -75 -50 -25
0
25 50 75 100
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:
3.5
3
2.5
2
Lifetime error
Temperature error
Initial error
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
The quiescent voltage is derived from the supply
pins VDD and GND and has the same value on both
AOUT and VREF:
-3.5
Figure 3 Distribution of max. total error in S1 range
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Table 4 Analog Output Characteristics
General conditions (unless otherwise specified): VDD = 3.3V; TS = -40°C … +105°C
Note / Test
conditions
Parameter
Symbol Min
Typ
Max
Unit
IPN = 0A; fully-
differential or semi-
differential
(bidirectional) modes,
standard setting
IPN = 0A; semi-
differential
Quiescent output voltage
(bidirectional option 1)1)2)
VOQbid_1
-
VDD/2
-
V
Quiescent output voltage
(bidirectional option 2)2)
(bidirectional) mode;
for this option the
ratiometricity offset is
disabled
IPN = 0A; semi-
differential
VOQbid_2
-
-
1.5
-
-
V
V
Quiescent output voltage
(unidirectional mode)2)
VOQuni
VDD/5.5
(unidirectional) mode
Sensitivity, range11)2)3)
Sensitivity, range22)3)
Sensitivity, range32)3)
Sensitivity, range42)3)
Sensitivity, range52)3)
Sensitivity, range62)3)
Sensitivity ratiometry factor
Quiescent ratiometry factor
S1
S2
S3
S4
S5
S6
KS
-
-
-
-
-
-
-
-
10
12
16
24
32
48
1
-
-
-
-
-
-
-
-
mV/A ±120A FS (Full Scale)
mV/A ±100A FS
mV/A ±75A FS
mV/A ±50A FS
mV/A ±37.5A FS
mV/A ±25A FS
-
KOQ
1
-
Analog output drive
capability
IO
-2
-
2
mA
DC current
VDD-VAOUT
Output
current = 2mA
-3dB criterion,
CO = 6.8nF
;
Analog output saturation
voltage
VSAT
-
150
300
mV
Transfer function cutoff
frequency
Output phase delay4)
BW
120
-
240
-
-
kHz
°
φdelay
48
fsignal = 120kHz
Referenced to Input
current, typical value is
at 25°C. Higher noise
is present at higher
temperatures.
Output Noise density5)6)
INOISE
-
350
-
µA/√Hz
Frequency up to
150kHz. Up to 20mT
homogeneous field
applied
External Homogenous
BSR
34
40
-
dB
magnetic field suppression4)
1) Pre-configured setting, for other pre-configured versions please contact your local sales.
2) Can be programmed by user.
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 tested in production. Proven by design, characterization and qualification.
5) Typical value in fully-differential mode, sensitivity range S6
6)
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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
ESENS
-2
-
2
%
@ TS = 25°C, at 0h
Sensitivity error over
temperature
ESENST
-2.5
-
2.5
%
At 0h
Sensitivity error over
ESENSL
EOFF
-3
-
-
-
3
%
temperature and lifetime4)
Output offset
-300
-500
300
500
mA
mA
@ TS = 25°C, at 0h
Output offset over
EOFF_L
temperature and lifetime4)
Percentage of FS,
sensitivity S1; includes
sensitivity, offset and
linearity error @ TS=25°C
at 0h
Total error
ETOT
-2.25
-
2.25
%
Percentage of FS,
sensitivity S1; includes
sensitivity, offset and
linearity error at 0h
Percentage of FS,
sensitivity S1; includes
sensitivity, offset and
linearity error
Total error over
temperature
ETOTT
-2.95
-3.45
-
-
2.95
3.45
%
%
Total error over
ETOTL
temperature and lifetime4)
4) Not tested in production. Proven by design, characterization and qualification.
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OCD thresholds
Fast Over-Current Detection
(OCD)
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.
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.
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.
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.
Over-current Pulse 1: duration exceeds the over-
current 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.
OCD pins external connection
The OCD pins can be connected to a logic input pin
of the microcontroller and/or the pre-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.
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.
Irail
2 x ITHR
ITHR
1
2
3
t
Glitch
counter
threshold
t
ΔtD_OCDx
VOCD
VDD
0.5 x VDD
t
tD_OCDx
tdeglitch
tD_OCDx
tD_OCDx
tdeglitch
ΔtD_OCDx
ΔtD_OCDx
tOC < (tD_OCDx + ΔtD_OCDx
)
tOC < (tD_OCDx + ΔtD_OCDx + tdeglitch
)
Figure 4 Fast over-current detection output timing
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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.
Parameter
Threshold level tolerance1)
Symbol
Min
Typ
Max
Unit
Note / Test Conditions
ITHT
-10
-
10
%
At 3σ, Irail=2xITHRx.x, input
rise time 0.1µs
Response time jitter1)
ΔtD_OCD
-
-
0.25
µs
Deglitch filter basic time
Detection minimum time
Load capacitance
tOCDgl
tOCD_low
CL
400
500
600
-
ns
µs
3
-
-
-
-
-
Valid for both OCDs
1
nF
Open-drain current
Pull-up resistor
IOD_ON
RPU
-
1
mA
kΩ
DC current
4.7
10
To VDD
1) Not tested in production. Proven by design, characterization and qualification
Table 6 OCD1 Parameters
Parameter
Symbol
ITHR1.1
ITHR1.2
ITHR1.3
ITHR1.4
ITHR1.5
ITHR1.6
ITHR1.7
ITHR1.8
tD_OCD1
tf_OCD1
Min
Typ
1.25
1.39
1.54
1.68
1.82
1.96
2.11
2.25
0.7
Max
-
Unit
x IFS
x IFS
x IFS
x IFS
x IFS
x IFS
x IFS
x IFS
µs
Note / Test Conditions
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
Factor with respect to IFS
IPN = 2*ITHR1.x
Threshold level - Level11)2)
Threshold level - Level21)2)
Threshold level - Level31)2)
Threshold level - Level41)2)3)
Threshold level - Level51)2)
Threshold level - Level61)2)
Threshold level - Level71)2)
Threshold level - Level81)2)
Response time4)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
Fall time5)
100
150
ns
tdeglitch = OCD1gl_mul*tOCDgl
pre-configured setting = 0
Deglitch filter setting2)6)
OCD1gl_mul
0
-
7
-
1) Symmetric threshold level for positive and negative currents.
2) Can be programmed by user.
3) Pre-configured threshold level
4) Falling edge level of OCD1-pin < 0.5 x VDD
5) Not tested in production. Proven by design, characterization and qualification.
6) The specified deglitching timing is valid when input current step overtakes the threshold of at least 10%.
.
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Datasheet
Table 7 OCD2 Parameters
Parameter
Symbol
ITHR2.1
ITHR2.2
ITHR2.3
ITHR2.4
ITHR2.5
ITHR2.6
ITHR2.7
ITHR2.8
tD_OCD2
tf_OCD2
Min
Typ
0.5
Max
Unit
x IFSR
x IFSR
x IFSR
x IFSR
x IFSR
x IFSR
x IFSR
x IFSR
µs
Note / Test Conditions
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
Factor with respect to IFS
IPN = 2 x ITHR2.x
Threshold level - level11)2)
Threshold level - level21)2)
Threshold level - level31)2)
Threshold level - level41)2)3)
Threshold level - level51)2)
Threshold level - level61)2)
Threshold level - level71)2)
Threshold level - level81)2)
Response time4)
-
-
-
-
-
-
-
-
-
-
-
0.61
0.71
0.82
0.93
1.04
1.14
1.25
0.7
-
-
-
-
-
-
-
1.2
300
Fall time5)
200
ns
tdeglitch = OCD2gl_mul x tOCDgl
pre-configured setting = 0
Deglitch filter setting2)6)
OCD2gl_mul
0
-
15
-
1) Symmetric threshold level for positive and negative currents.
2) Can be programmed by user.
3) Pre-configured threshold level.
4) Falling edge level of OCD2-pin < 0.5 x VDD
.
5) Not tested in production. Proven by design, characterization and qualification.
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
(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.
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TLI4971
Datasheet
Isolation Characteristics
TLI4971 conforms functional isolation.
Table 8 Isolation Characteristics
Parameter
Symbol
Min
Typ Max
Unit Note / Test Conditions
Maximum rated working
voltage (sine wave)1)2)3)
VIOWM
VIOWMP
VIORM
-
-
-
-
-
690
975
1150
-
V
V
V
V
RMS, @ 4000m altitude
Peak, @ 4000m altitude
Maximum rated working
voltage (sine wave)1)2)3)
-
-
Maximum repetitive
isolation voltage2)3)
Max DC voltage, spike,
@ 4000m altitude
Apparent charge voltage
capability (method B)2)3)
Partial discharge < 5pC peak
@ 0m altitude
VPDtest
1500
Isolation test voltage3)4)
VISO
2500
3000
-
-
-
-
V
V
RMS, 60s
RMS, in production,
VISOP
1.2s, UL certified version
RMS, in production, 600ms,
Non-UL certified version
Peak, rise time = 1.2µs,
fall time = 50µs
Isolation production test
voltage
VISOP
Vpulse
CPG
CLR
2470
4500
4
-
-
-
-
-
-
-
-
V
Isolation pulse test voltage3)
V
Minimum external creepage
distance
Minimum external clearance
distance
mm
mm
4
Minimum comparative
tracking index
Isolation resistance3)
Material
group II
CTI
RIO
-
-
-
-
-
10
GΩ
UIO = 500V DC, 1min
1) The given value is considered an example based on pollution degree 2.
2) After stress test according to qualification plan.
3) Not subject to production test - verified by design and characterization.
4) Agency type tested for 60 seconds by UL according to UL 1577 standard.
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Datasheet
System integration
VCC_IO
VCC_IO
VDCLink
IP+
IP-
Load
VSens
6
PWM
TLI4971
VDD
GND
Gate-
Driver
220nF
25V
µC
PGND
VCC_IO
VCC_IO
VAREF
EN
VAREF
VAREF
4k7Ω 4k7Ω
1kΩ
1nF
25V
1nF
50V
GPIO
220nF
25V
6.8nF
25V
1kΩ
220Ω
220Ω
220Ω
A/D
A/D
A/D
A/D
15nF 15nF 15nF
25V 25V 25V
6.8nF 6.8nF 6.8nF
25V 25V 25V
Optional low pass filter for bandwidth limitation fc = 48.2kHz
Figure 5 Application circuit for three phase system in single-ended configuration
VCC_IO
VCC_IO
VDCLink
IP-
IP+
Load
6
VSens
PWM
VDD TLI4971
Gate-
Driver
220nF
25V
GND
µC
PGND
VCC_IO VCC_IO
VAREF
EN
VAREF
GPIO
4k7Ω 4k7Ω
1nF
25V
1nF
50V
220Ω
220Ω
220Ω
220Ω
220Ω
220Ω
A/D
A/D
A/D
A/D
A/D
A/D
6.8nF 6.8nF 6.8nF 6.8nF 6.8nF 6.8nF
25V 25V 25V 25V 25V 25V
15nF 15nF 15nF 15nF 15nF 15nF
25V 25V 25V 25V 25V 25V
Optional low pass filter for bandwidth limitation fc = 48.2kHz
Figure 6 Application circuit for three phase system in differential configuration
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Datasheet
VCC_IO
VSens
VDD
VCC
220nF
GND
4k7Ω 4k7Ω
GND
GND
µC
TLI4971
220Ω
220Ω
A/Din
A/Din
INTN
INTN
VREF
AOUT
OCD1
OCD2
6.8nF 6.8nF 1nF
25V 25V 25V 50V
1nF
15nF
25V
15nF
25V
Optional low pass filter
for bandwidth limitation fc = 48.2kHz
Figure 7 Application circuit with external components
For bandwidth limitation an external filter is recommended as shown in the above application circuits.
Datasheet
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TLI4971
Datasheet
Package
The TLI4971 is packaged in a RoHS compliant, halogen-free leadless package (QFN-like).
PG-TISON-8 Package Outline
4.83
0.1
0.1
A
A
4.83
0.6
2.32
0.6
0.1 A
2.32
0.30
0.1
A
0.25
0.30
B
0.25
A
7
8
1
6
1.0
1.4
8 x
1.0
0.1 M A
INDEX MARKING
1.1 MAX.
0.4
2.26
R0.20
R0.30
R0.20
R0.30
0.60
0.60
Figure 8 PG-TISON-8 package dimensions
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Datasheet
This page is left intentionally blank.
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Revision History
Major changes since the last revision
Date
Description of change
10-02-2020 Initial version
09-03-2020 Pre-configured OCD threshold levels changed / Page3, Table 6 and Table 7
Standard Product Configuration updated on Page 3 / OCD settings according to Table 6 and Table 7
Updated Table 8, isolation characteristics
Updated application circuits
Editorial changes
Revision update 1.1
Datasheet
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Edition 09-03-2020
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Published by
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contact your nearest Infineon Technologies office
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