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无锡弗勒捷电流传感器

电流传感器

STK-xxCTS系类

发布时间:2022/5/30 0:00:00来源:http://www.pinlwdz.com/supply/25.html

CURRENT SENSOR

Product series:

Product part number:

Version:

STK-CTS/xx

STK-20CTS/DT

STK-30CTS/DT

STK-20CTS/T

Ver 3.6

CONTENTS

1. Description 

2. STK-20CTS/T & STK-20CTS/DT parameters 

3. STK-30CTS/DT parameters 

4. Frequency band width 

5. Step response time 

6. Frequency delay performace 

7. STK-CTS/DZ: Dimensions & Pins & Footprint 

8. STK-CTS/Z: Dimensions & Pins & Footprint 

9. TYPICAL APPLICATION CIRCUIT (STRING)

10. TYPICAL APPLICATION CIRCUIT (ARC CURRENT) 

1. Description

STK-CTS/xx series current sensors are based on open loop principle with TMR technology. The sensor can detect those current with DC, AC, pulse and irregular wave shape. Because of its very wide frequency band width of DC ~ 700 kHz, the sensor can detect both of string current and the ARC current at the same time. With build-in coil, the sensor supports the self-check function.

Typical application

String current in PV

MPPT

AC current detection

ARC current detection

Variable speed driving

Switch mode power supply

General parameters

Parameter

Symbol

Unit

Value

Working temperature

T_A


-40 ~ 85

Storage temperature

T_stg

-40 ~ 105

Mass

m

g

10

Absolute parameters

Parameters

Symbol

Unit

Value

Supply voltage

VC

V

6

ESD rating (HBM)

UESD

V

4

Remark: the unrecoverable damage may occur when the product works on the conditions over the absolute maximum ratings. Long-time working on the absolute maximum ratings may cause the degradation on performance and reliability .

Isolation parameters

Parameter

Symbol

Unit

Value

Remark

Isolation    voltage,    50 Hz, 1 min

Ud

V

4

 

Clearance

CI

mm

> 8

Shortest distance through air

Creepage distance

dCp

mm

> 8

Shortest distance along device body

Case material

 

 

V0 according

to UL 94

2. STK-20CTS/T & STK-20CTS/DT parameters

Condition: Vcc = 5.0 V, T_A = 25℃ , unless specified.

Parameters

Symbol

Unit

Min.

Typ.

Max.

Remark

Primary current

I_pn

A

 

20

 

 

Maximum

current

I_pm

A

-20

 

20

 

Supply voltage

Vcc

V

4.75

5

5.25

 

Consumption

current

Icc

A

 

4

 

 

Self-checking

current

I  ck

A

2

2

 

The current requested for self-checking function

Build-in         coil resistance

Rlm

ohm

 

2.8

 

100-turns build-in coil

Build-in         coil impedance

XLck

ohm

 

80

 

@ 10 kHz

Full-scale

output

V  FS

_

V

 

2

 

((Vout@I_pn)-(Vout@(-I_pn)))/2

Output

resistance

R  out

Ω

 

10

 

@ Vout

Offset voltage

Voff

V

2.48

2.5

2.52

Vout @ 0 A

Theoretical gain

G  th

mV/A

 

100

 

2 V @ I_pn

Gain error

Err  G

%G_th

-0.5

 

0.5

Adjusted @25

Non-linearity

Non-L

%I_pn

-0.5

 

0.5

± I_pn

Step    response time

t_res

μs

 

1

 

@90% of IPN

Delay time

t_delay

μs

 

1

 

@ 500 kHz

-3     dB     band

width

BW

kHz

 

500

 

 

Noise

DC ~ 10 kHz  DC ~ 100 kHz

 

Vnoise

 

mVpp

 

 

15

25

 

 

Accuracy @ RT

X

% of

I_pn

- 1

 

1

@ 25

Accuracy

X_TRange

% of

I_pn

-2.5

 

2.5

-40~ 85

3. STK-30CTS/DT parameters

Condition: Vcc = 5.0 V, T_A = 25℃ , unless specified.

Parameters

Symbol

Unit

Min.

Typ.

Max.

Remark

Primary current

I_pn

A

 

30

 

 

Maximum

current

I_pm

A

-30

 

30

 

Supply voltage

Vcc

V

4.75

5

5.25

 

Consumption

current

Icc

A

 

4

 

 

Self-checking

current

I  ck

A

 

2

 

The current requested for self-checking function

Build-in         coil resistance

Rlm

ohm

 

2.8

 

100-turns build-in coil

Build-in         coil impedance

XLck

ohm

 

80

 

@ 10 kHz

Full-scale

output

V  FS

_

V

 

2

 

((Vout@I_pn)-(Vout@(-I_pn)))/2

Output

resistance

R  out

Ω

 

10

 

@ Vout

Offset voltage

Voff

V

2.48

2.5

2.52

Vout @ 0 A

Theoretical gain

G  th

mV/A

 

66.7

 

2 V @ I_pn

Gain error

Err  G

%G_th

-0.5

 

0.5

Adjusted @25

Non-linearity

Non-L

%I_pn

-0.5

 

0.5

± I_pn

Step    response time

t_res

μs

 

1

 

@90% of IPN

Delay time

t_delay

μs

 

1

 

@ 500 kHz

-3     dB     band

width

BW

kHz

 

500

 

 

Noise

DC ~ 10 kHz  DC ~ 100 kHz

 

Vnoise

 

mVpp

 

 

15

25

 

 

Accuracy @ RT

X

% of

I_pn

- 1

 

1

@ 25

Accuracy

X_TRange

% of

I_pn

-2.5

 

2.5

-40~ 85

4. Frequency band width


Fig. 1 the band width of STK-CTS/xx series current sensors.

5. Step response time


Fig.2 the step response time of STK-CTS/xx current sensors. The light blue is primary current, while the dark blue is output signal of current sensor. The step response time is less than 1 μs.

6. Frequency delay performace


Fig.3 when detection the primary current with a frequency of 500 kHz. The delay time from primary current (light blue) to the output of the sensor (dark blue) is less than 1 μs.

7. STK-CTS/DZ: Dimensions & Pins & Footprint


8. STK-CTS/Z: Dimensions & Pins & Footprint


9. TYPICAL APPLICATION CIRCUIT (STRING)


R1 (ohm)

C1 (nF)

Theoretical

-3 dB, f = 1/(2π RC), (kHz)

Measured

-3 dB, (kHz)

100

1

1592

~ 500

240

4.7

141

~ 150

2000

9.4

8

~ 10

10. TYPICAL APPLICATION CIRCUIT (ARC CURRENT)


Note:

1 、 The band-pass setting: 1 kHz ~ 500 kHz.

2 、 The current for self-checking: frequency of ~ 10 kHz with amplitude of higher than 2 mA.


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