LA17P

CURRENT SENSORS

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Magnetic Proportion System / Non ratiometric output, Vref-OUT/IN mode, Ta=105℃ Operating,

LA17P S05 SERIESIntroduction【STANDARDS】
・UL508・CSA C22.2 No.14
・EN 62477-1

RoHS

ABSOLUTE MAXIMUM RATINGS
Parameters

Fluxgate system

Symbol

Unit

Value

Maximum supply voltage(not destructive)

VCC

V

15

Operational supply voltage(not entering non standard modes)

VCC

V

7.2

Primary conductor temperature

―℃

120

ESD (HBM : Human Body Model)

VESD

kV2Comment

C=150 pF, R=330 Ω

ISOLATION CHARACTERISTICS

Closed loop

Open loop

Parameters
Insulation voltage

Symbol

Unit

Value

Vd―

AC4300V，for 1minute(Sensing current 0.5mA)

CommentPrimary ⇔ Secondary
Primary ⇔ Secondary
Input waveform：
・Front time 1.2µs
・Time to half value 50µs
・singleImpulse withstand voltage

Vw

kV

8.0

Clearance distancedCl―

8.0 mm（MIN)

Primary ⇔ Secondary

Creepage distance

dCp―

8.0 mm（MIN)

Primary ⇔ Secondary

Case material――

UL94 V-0

Comparative Tracking Index;（CTI）

CTIV

600 ( group Ⅰ )ENVIRONMENTAL AND MECHANICAL CHARACTERISTICS
Value

Parameters

SymbolUnitAmbient operating temperature

TA℃－ 40＋ 105

Ambient storage temperature

TS℃－ 40＋ 105

Massmg

6.5

Internal magnetic core――Ferrite

MIN

TYP

112

MAXCommentLA17P

CURRENT SENSORSSPECIFICATIONS

Value
MIN

LA17P010S05

10

LA17P016S05

1620

A

Introduction

IPN

32

LA17P040S05

40

LA17P050S05

50

LA17P010S05－ 2525

LA17P016S05－ 4040－ 5050－ 80

80

LA17P040S05

－ 100

100

LA17P050S05－ 125125

LA17P020S05
LA17P032S05

IPM

ANPTRPmΩ

Supply voltage

Vcc

VConsumption current

Icc

mA

Internal reference voltage (output)

Vref1

V

2.48

External reference input voltage

Vref2

V

0.50

Number of primary turns
TA = 25℃
TA = 105℃

CommentMAX

Vcc > 4.8V
Ref OUT mode

1
0.21
0.28
4.5

5.5

1623

@ Ip = 0A, Icc = 16+ Vout / RL

2.50

2.52

Ref OUT mode

2.65

Ref IN mode

0.7

1.0

Vref to GND. See"support docu..." section.

510

Vref to Vcc. See"support docu..."section.

2

Ref OUT mode

IrefmA

Reference sink current

IrefmA

Vout-Vref

V−2Internal output resistance of VrefRrefΩ150

Internal output resistance of VoutRoutΩ

External capacitive load of Vref

CL_refnF

External capacitive load of Vout

CL_outnF

Electrical offset voltage (@ IP=0 A) ＊ 1

VoemV−55Vout - Vref @ Vref = 2.5 V

Temperature drift of Vref

VrefT

mV− 1010@TA = − 40℃～ 105℃

Temperature drift of Voe (@ IP=0 A)

VoeT

mV− 1010@TA = − 40℃～ 105℃

Theoretical sensitivity

0.5

5.0

Reference source current

Output voltage range (@ IPM)

200300250.547
4.7

LA17P010S05

80.0

LA17P016S05

50.0

LA17P020S05

Gth40.0mV/A

LA17P032S05

25.0

LA17P040S05

20.0

LA17P050S05

16.0

800mV @ IPN
Vout = Vref + Voe+ ( Gth × IP )Sensitivity error ＊ 2εG%

－ 0.5

0.5

@ IPN

Temperature drift of sensitivity

GT%－33@TA = − 40℃～ 105℃

＊ 1 Electrical offset voltage value is after removal of magnetic offset voltage ( core hysteresis ).
＊ 2 It is the adjustment value at the time of shipment from the factory.

113

Fluxgate system

LA17P032S05

Primary conductor resistance

TYP

Open loop

Unit

Closed loop

Symbol

LA17P020S05

Primary current, measuring range

4 2203TA = +25℃ RL = 10 kΩ CL_out = 4.7 nF CL_ref = 47 nF, Vcc = +5.0 V

Parameters
Primary nominal current

2/5

LA17P

CURRENT SENSORSSPECIFICATIONS
SymbolUnit

εL%

Magnetic offset current referred to primary

IOM

A

Reaction time (@ 10 % of IPN)

tra

Response time (@ 90 % of IPN)
Frequency bandwidth@0A 〜 I PN

Linearity error

Introduction

4 2203TA = +25℃ RL = 10 kΩ CL_out = 4.7 nF CL_ref = 47 nF, Vcc = +5.0 VParameters＊ 3 Accuracy formula is following

ValueMINTYP

CommentMAX− 0.50.5− 0.50.5− 0.250.25@ IP = 10 × IPNµs

2@di/dt= IPN / µs

trµs

2.5@di/dt= IPN / µs

BW

kHz

TA=25℃

X1% of IPN− 1.01.0

TA=105℃

X2% of IPN− 5.35.3@0A 〜 I PM

Accuracy ＊ 3

Fluxgate system

3/5@ − 3dB

400

@ IPN

Accuracy X1 = εG + εLAccuracy X2 = X1 + (VoeT / 800 × 100) + GT

STANDARDS

Open loopEN62477-1:2012, EN62477-1:2012/A1:2017 and EN62477-1:2012/A11:2014
Rated voltage
600 V, CAT Ⅲ , PD2, Reinforced isolation, non uniform field
UL508, CSA C22.2 No.14（ UL FILE No. E243511 ）Rated voltage
600 V, PD2	The devices have been evaluated that they are intended to be supplied from an isolated
secondary circuit of Limited Voltage/Current circuit or Limiting Impedance circuit defined inUnited States Standard or Industrial Control Equipment, UL 508.
※ Please refer to the another sheet about conditions of UL Recognition.

Closed loopCHARACTERISTIC CURVE (TYP)

Fig 1 : Linearity curve Internal reference voltage)Fig 2 : Linearity curve Internal reference voltage)

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CURRENT SENSORS

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SUPPORT DOCUMENTATION
Reference voltage
The Ref pin can be used as Ref OUT mode and/or Ref IN mode.
＜Ref OUT mode＞＜Ref IN mode＞
An external reference voltage is connected to the Ref pin. This voltage is specified in the range 0.5 to 2.65 V, its voltage is used as theoffset voltage at the measurement.

Introduction

The 2.5 V internal reference is used by the transducer as the reference point for bipolar measurements.

The following graphs (Fig3) show the output voltage (@ Ip = 0A) and the reference input / output current due to the external reference

Fluxgate system

voltage value Vref2.

TA = +25 ℃
Vcc = +5.0 V
RL = 10 kΩ
CL_out = 4.7 nF
CL_ref = 47 nF

Open loop

Fig 3：Vref2 input voltage vs Output voltage and Iref2 ( = Vref2 current)(Typical performance)

CONNECTION
98

Primary inputcurrent (+)
4Vcc

100nF
HERoutEEPROM

567Vout

CL_outRrefIntRef

21

3Closed loop

10RL
Vref(IN/OUT)

CL_ref

GND

Primary input
current (-)

Condition ( Standard )C1= 100 nF
CL_ref = 0.5 nF MIN , 4.7 nF MAX
CL_out = 4.7 nF MAX
RL= 10kΩ< Notice >- Capacitors are recommended for Vout and Vref terminals in order to reduce the noise of the output voltage.
Vout terminal : 4.7 nF, Vref terminal : 47 nF.

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CURRENT SENSORS

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Introduction

DIMENSIONS (mm)Fluxgate system

Terminal No.
1 : Vref (IN/OUT)
2 : Vout
3 : GND4 : Vcc (+5V)
5 : Primary input current(-)
6 : Primary input current(-)
7 : Primary input current(-)
8 : Primary input current(+)
9 : Primary input current(+)
10 : Primary input current(+)

Closed loop

Open loop

Tolerance : ± 0.2
Unit : mm

RECOMMEND HOLE DIAMETER (unit : mm)

Perspective view
Unit : mm

116

4 2203

Notices

CURRENT SENSORS

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3 1510

Important Notice
7. This product is not designed to resist radiation.

1. The content of this information is subject to change without

vehicle equipment, safety devices, and so on) in which・U se in liquids such as water, oil, chemical solutions, ororganic solvents, and use in locations where the product will
be exposed to such liquids.
・U se that involves exposure to direct sunlight, outdoor
exposure, or dusty conditions.
・Use in locations where corrosive gases such as sea winds,Cl2, H2S, NH3, SO2, or NO2, are present. (Some productimproves durability)・U se in environments with strong static electricity orelectromagnetic radiation.
・Use that involves placing inflammable material next to theproduct.
・Use of this product either sealed with a resin filling or coatedwith resin.
・Use of water or a water soluble detergent for flux cleaning.
・Use in locations where condensation is liable to occur.

extremely high quality and high reliability is required, or if

8. D o not use or otherwise make available the TAMUTA

the malfunction or failures of product could be cause loss ofproducts or the technology described in this document for any

human life, bodily injury.

military purposes, including without limitation, for the design,prior notice for the purpose of improvements, etc. Ensure thatyou are in possession of the most up-to-date information whenusing this product.
2. T his product is intended to be used in general electronics
applications (electric home appliances, business equipment,
information equipment, communication terminal equipment,
measuring devices, industrial equipment, and so on). This
product is neither intended nor warranted for use in following
equipment or devices:
Special application (such as for medical devices,transportation equipment, traffic signal control equipment,
fire and crime prevention equipment, aeronautics andspace devices, nuclear power control, fuel control, in-Tamura Corporation shall not be held responsible for any

development, use, stockpiling or manufacturing of mass

damage incurred by customers or any third party when products

destruction weapons (e.g. nuclear, chemical, or biologicalare used in special application, unless specifically permitted inweapons or missile technology products). When exporting

this document.

and re-exporting the products or technology described in thisdocument, you should comply with the applicable export control

3. Tamura Corporation constantly strives to improve quality andlaws and regulations and follow the procedures required byreliability, but malfunction or failures are bound to occur withsuch laws and regulations including, without limitation, Japansome probability in current sensor. To ensure that failures do-Foreign Exchange and Foreign Trade Control Law and U.S.-

not cause accidents resulting in injury or death, fire accidents,

Export Administration Regulations. The TAMURA productssocial damage, and so on, users are to thoroughly verify theand related technology should not be used for or incorporated

safety of their designs in devices and/or systems.

into any products or systems whose manufacture, use, or saleis prohibited under any applicable domestic or foreign laws or4. The operation examples and circuit examples shown in thisregulations.

information are for reference purposes only, and Tamura
Corporation disclaims all responsibility for any violations of

9. Please contact your TAMURA sales office for details as toindustrial property rights, intellectual property rights and any

environmental matters such as the RoHS compatibility ofother rights owned by Tamura Corporation or third parties that

Product. Please use TAMURA products in compliance with allthese may entail.

applicable laws and regulations that regulate the inclusion or5. T he circuit examples and part constants listed in theseuse of controlled substances, including without limitation, thespecifications are provided as reference for the verification

EU RoHS Directive. TAMURA assumes no liability for damagesof characteristics. The user is to perform design, verification,or losses occurring as a result of your noncompliance withand judgment under his or her own responsibility, taking into

applicable laws and regulations.

account the various conditions.

10. T
 AMURA assumes no liability for damages or losses incurred by
you or third parties as a result of unauthorized use of TAMURA

6. T he products are designed for use in environments whereproducts.

consumer electronics are commonly used. It is not designed foruse in special environments such as listed below, and if such

11. T his document and any information herein may not be

use is considered, the user is to perform thorough safety andreproduced in whole or in part without prior written permission

reliability checks under his/her responsibility.

from TAMURA.

9Appli noteCURRENT SENSORS

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3 1709Application notes<General Considerations><Open loop>

1. T he sensor uses polar electronic components. When the

1. High frequency primary current may result in excessive heating

polarity of the power supply is mistaken, the sensor is damaged.

in iron magnetic core and cause damage to internal circuitry;

2. Static electricity or excessive voltage can increase an offset

for high frequency applications select current sensor with ferrite

voltage in the Hall element, and cause offset voltage to change.

core material.
2. If the measured current exceeds the rated current, magnetic

Please exercise care in handling and application.

core saturation will occur and the output voltage signal will not

3. In order to prevent the influence of noise, the use of twisted

be linearly proportional to the measured current.

cable or shielded cable for the output line is recommended
4. If using this device within a magnetic field generated by otherdevices, the specified accuracy may not be obtainable.

<Closed Loop>

5. O ur products（several models are excluded ）are adjusted

1. For closed loop current sensors please insure the power supply

with the trimming method by the measurement condition

voltage is balanced, symmetrical, and, applied simultaneously（Load resistance, Power supply voltage）of specification

to avoid potential increase in DC offset error.

sheets. Therefore, characteristics（Offset, Output, etc.）and its

2. Maximum rated current measurement duration is timedependent.

deviation may be changed in different circuit conditions from

Maximum rated current applied in excess of the time limit canthe measurement condition. All change characteristic items are

result in damage to internal electronic circuitry; please consult

not indicated on specification sheets.

Tamura for assistance.

6. The performance of current sensors with through-hole（aperture）

3. When using a measurement resistor to convert current output

is dependent on the position of the primary conductor. Tamura

to voltage output select a resistor with stable temperature

specifications are based on a primary conductor completely

characteristic to insure accuracy of the output voltage.

filling the through-hole（aperture）area.

4. Compensation current supplied to the secondary winding varies

7. T he current sensor rated current in DC Amps.

in proportion to the measured current based on the conversion

8. Please use mating connector with equivalent terminal platingratio.（If/KN; KN ＝ secondary turns）Please insure the PSU

material to insure proper operation and avoid possibility ofhas required current capacity to supply compensation current‘galvanic corrosion’.

to the secondary winding.

9. P lease do not store in high-temperature and high-humidity
storage environment. Please use it after confirming soldering<Flux-Gate>

when it is kept for six months or more.（product soldered with

1. Compensation current supplied to the secondary winding variessubstrate）
10. We recommend performing a zero offset adjustment by measuring

in proportion to the measured current. Please insure the PSU

the offset voltage at startup. In continuously operation for a few

has required current capacity to supply compensation current
to the secondary winding.

months, or at change of ambient temperature or humidity is large,

2. T here is 450kHz ripple voltage present on the output andwe recommend regularly performing a zero offset adjustment atreference output voltage signals . An external capacitor maybe

being idling（it is clear that the current is not apply）.

added if necessary.

11. The current sensor doesn't have built-in protection circuit(devices and fuses, etc.). As a failure mode of the sensor,
there is a short circuit and open state. In the case of a shortcircuit state, the abnor-mal temperature rise of the internal
parts is assumed, and there is a possibility to smoke and toignite. If it is used in safety critical circuit blocks, please takeappropriate measures by protection devices, protection circuits,etc. For closed loop –type sensors and flux gate (closed looptype) sensors, the consumption current of the secondary power
supply varies in proportion to the measurement current.

7