Document 369-1
SMT Current Sensor
–
T6522-AL
This low cost transformer is designed for use at 50 kHz to
300 kHz to sense continuous currents up to 3 Amps.The
current windings can be connected in series to provide
twice the output sensitivity. It offers 500 Vrms interwind-
ing isolation.
The small footprint, low profile, surface mount ceramic
case makes it ideal for high-density boards and provides
an excellent surface for pick and place operations.
Applications include power supply feedback control, mo-
tor protection, overload sensing and detecting load drop
or shutdown.
To request free evaluation samples, contact Coilcraft or
visit www.coilcraft.com.
Frequency
range
Sensed
current
max Iin
Volt-time
product4
(V-µsec)
RT for
1 Vout
from 1 A Iin
DCR max (Ohms)
1,2 – 5,6 3 – 4
Part
Turns (N)2 Inductance3
5
number1
pri : sec
min (mH)
(kHz)
T6522-AL_
1:50
3.4
0.006
0.70
50 – 300
3 A
30
50 Ohms
1. When ordering, please specify packaging code:
T6522-ALD
Typical Response (with RT = 50 Ohm)
3.0
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape (750 per full reel).
2.5
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter D instead.
Series
Parallel
2.0
1.5
1.0
2. The two primary windings may be connected in parallel (1:50) to provide
up to 3 A (Iin) sensing capability (3 Vout), or connected in series (2:50) to
provide twice the sensitivity (1 A Iin yields 2 Vout)
.
3. Inductance is for the secondary, measured at 100 kHz, 0.1 Vrms.
4. Maximum volt-time product for the secondary.
5. Varying terminating resistance increases or decreases output Voltage/
Ampere according to the following equation:
RT = Vout × Nsec / Iin.
0.5
0
6. Electrical specifications at 25°C.
0
0.5
1.0
1.5
2.0
2.5
3.0
Current (Amps rms)
Typical Application
3
1
2
I
R
V
out
1T
in
50 T
4
T
5
6
Document 369-1 Revised 03/20/07
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.