PTVSHC3D18VU
Uni-directional 18V High Capacitance TVS Protector
Description
The PTVSHC3D18VU transient voltage suppressor is designed to replace
multilayer varistors (MLVs) in portable applications such as cell phones,
notebook computers, and PDA’s. They feature large cross-sectional area
junctions for conducting high transient currents, offer desirable electrical
characteristics for board level protection, such as fast response time, lower
operating voltage, lower clamping voltage and no device degradation when
compared to MLVs. The PTVSHC3D18VU protects sensitive semiconductor
components from damage or upset due to electrostatic discharge (ESD) and
other voltage induced transient events. The PTVSHC3D18VU is available in
a SOD-323 package with working voltages of 18 volt.
SOD-323(Top View)
Feature
1200W Peak pulse power per line (t
P
= 8/20μs)
SOD-323 package
Response time is typically < 1 ns
Protect one I/O or power line
Low clamping Voltage
RoHS compliant
Transient protection for data lines to IEC 61000-4-2(ESD)
±30KV(air), ±30KV(contact); IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 30A (8/20us)
Circuit Diagram
Pin1
Pin2
Applications
Cell phone handsets and accessories
Personal digital assistants (PDA’s)
Notebooks, desktops, and servers
Portable instrumentation
Cordless phones
Digital cameras
Peripherals
MP3 players
Marking (Top View)
Pin1
H18
Pin2
Mechanical Characteristics
Lead finish:100% matte Sn(Tin)
Mounting position: Any
Qualified max reflow temperature:260℃
Pure tin plating: 7 ~ 17 um
Pin flatness:≤3mil
Rev.06.3
1
www.prisemi.com
Transient Voltage Suppressor
Electronics Parameter
Symbol
V
RWM
I
R
V
BR
I
T
I
PP
V
C
P
PP
C
J
I
F
V
F
PTVSHC3D18VU
Parameter
Peak Reverse Working Voltage
Reverse Leakage Current @ V
RWM
Breakdown Voltage @ I
T
Test Current
Maximum Reverse Peak Pulse Current
Clamping Voltage @ I
PP
Peak Pulse Power
Junction Capacitance
Forward Current
Forward Voltage @ I
F
V
C
V
BR
V
RWM
I
F
I
V
I
R
V
F
I
T
I
PP
Electrical characteristics per line@25℃( unless otherwise specified)
Parameter
Peak Reverse Working Voltage
Breakdown Voltage
Reverse Leakage Current
Clamping Voltage
Clamping Voltage
Junction Capacitance
Symbol
V
RWM
V
BR
I
R
V
C
V
C
C
j
Conditions
Min.
Typ.
Max.
18
Units
V
V
μA
V
V
pF
I
t
=1mA
V
RWM
=18V
I
PP
=1A
I
PP
=30A
V
R
=0V
t
P
= 8/20μs
t
P
= 8/20μs
f = 1MHz
20
21.5
23
1
25
43
250
30
47
350
Absolute maximum rating@25℃
Rating
Peak Pulse Power ( t
P
= 8/20μS )
Lead Soldering Temperature
Operating Temperature
Storage Temperature
Symbol
P
pp
T
L
T
J
T
STG
Value
1200
260 (10 sec)
-55 to +125
-55 to +150
Units
W
℃
℃
℃
Rev.06.3
2
www.prisemi.com
Transient Voltage Suppressor
Typical Characteristics
I
PP
100
80
60
40
20
0
t
f
=8μs
100
80
60
40
20
0
PTVSHC3D18VU
I
PP
– Peak Pulse Current - % of
t
P
=20μs(I
PP
/2)
% Of Rated Power
0
5
10
15
t - Time -μs
20
25
30
0
25
50
75
100
125
150
T
L
– Lead Temperature -
℃
Fig 1.Pulse Waveform
50
Pulse waveform: tp=8/20us
400
Fig 2.Power Derating Curve
f=1MHz
320
C-Junction capacitance (pF)
40
V
C
-Clamping Voltage (V)
30
240
20
160
10
80
0
0
0
10
20
I
PP
-Peak pulse current (A)
30
40
0
4
8
12
V
R
-Reverse voltage (V)
16
18
Fig 3. Clamping voltage vs. Peak pulse current
10000
Fig 4. Capacitance vs. Reveres voltage
Peak Pulse Power (W)
1000
100
10
1
10
Fig 5. Non Repetitive Peak Pulse Power vs. Pulse time
Rev.06.3
3
www.prisemi.com
100
Pulse Duration(us)
1000
Transient Voltage Suppressor
Solder Reflow Recommendation
Peak Temp=257℃, Ramp Rate=0.802deg.
℃/sec
280
PTVSHC3D18VU
240
200
160
120
80
40
0
0
30
60
90
120
150
180
210
240
270
300
330
360
390
420
450
480
Time (sec)
PCB Design
For TVS diodes a low-ohmic and low-inductive path to chassis earth is absolutely mandatory in order to achieve good ESD
protection. Novices in the area of ESD protection should take following suggestions to heart:
Do not use stubs, but place the cathode of the TVS diode directly on the signal trace.
Do not make false economies and save copper for the ground connection.
Place via holes to ground as close as possible to the anode of the TVS diode.
Use as many via holes as possible for the ground connection.
Keep the length of via holes in mind! The longer the more inductance they will have.
Rev.06.3
4
www.prisemi.com
Transient Voltage Suppressor
Product dimension (SOD-323)
Inches
MIN
0.063
0.045
0.090
0.031
0.010
0.004
0.000
PTVSHC3D18VU
C
A
E
B
Dim
A
B
C
D
Millimeters
MIN
1.60
1.15
2.30
0.80
0.25
0.09
0.00
MAX
0.075
0.057
0.106
0.043
0.01
0.007
0.004
MAX
1.90
1.45
2.70
1.00
0.40
0.18
0.10
F
H
D
E
F
H
3.00
0.90
0.80
Suggested
PCB Layout
Unit:mm
Ordering information
Device
PTVSHC3D18VU
Package
SOD-323 (Pb-Free)
Reel
7"
Shipping
3000 / Tape & Reel
Rev.06.3
5
www.prisemi.com
51单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
