PolyZen Devices
PolyZen Devices
Polymer Protected Zener Diode
PolyZen devices are polymer enhanced precision Zener
diode micro-assemblies that help protect sensitive
electronics from damage caused by inductive voltage
spikes, voltage transients, use of incorrect power supplies
and reverse bias.
The PolyZen micro-assembly incorporates a stable
Zener diode for precise voltage clamping and a
resistively non-linear, polymeric positive temperature
coefficient (PPTC) layer that responds to either diode
heating or overcurrent events by transitioning from a
low to high resistance state.
PolyZen devices help provide resettable protection
against damage caused by multi-watt fault events and
require only 0.7W power dissipation. In the event of
sustained high power conditions, the PPTC element of
the device “trips” to limit current and generate voltage
drop. This functionality helps protect both the Zener
and the follow-on electronics, effectively increasing the
diode’s power handling capacity.
5
Benefits
• Helps shield downstream electronics from overvoltage
and reverse bias
• Trip events shut out overvoltage and reverse bias
sources
• Analog nature of trip events minimize upstream
inductive spikes
• Helps reduce design costs with single component
placement and minimal heat sinking requirements
Features
• RoHS compliant
• Overvoltage transient suppression
• Hold currents up to 2.3A
• Time delayed, overvoltage trip
• Time delayed, reverse bias trip
• Power handling on the order of 30 watts
• Integrated device construction
Applications
• Portable media players
• Global positioning systems
• Hard disk drives 5V & 12V bus
• Solid State Drives (SSD) 5V bus
• Cellphone charger port and USB power
• Automotive peripheral input power
• DC power port protection
• Industrial handheld POS
31
Figure PZ1 Typical Application Block Diagram for PolyZen Devices
Power Supply
(External or internal)
Protected Electronics
GND
V
IN
1
+
2
PolyZen
Device
3
V
OUT
Regulated
Output
R
LOAD
Protected downstream
electronics
Table PZ1 Electrical Characteristics for PolyZen Devices
(Performance ratings @ 25°C unless otherwise specified)
V
Z
(V)
V
INT MAX
I
Zt
(A)
I
HOLD
@ 20°C
(A)
R
Typ
(Ω)
R
1MAX
(Ω)
V
INT MAX
(V)
Test
Current
(A)
I
FLT MAX
(A)
I
FLT MAX
Test
Voltage
(V)
5
Part Number
Min.
Typ.
Max.
ZEN056V130A24LS
ZEN059V130A24LS
†
ZEN065V130A24LS
ZEN098V130A24LS
ZEN132V130A24LS
ZEN164V130A24LS
ZEN056V230A16LS
ZEN065V230A16LS
ZEN098V230A16LS
ZEN132V230A16LS
ZEN056V075A48LS
ZEN132V075A48LS
ZEN056V115A24LS
ZEN056V130A24GS*
5.45
5.80
6.35
9.60
13.20
16.10
5.45
6.35
9.60
13.20
5.45
13.20
5.45
5.45
5.60
5.90
6.50
9.80
13.40
16.40
5.60
6.50
9.80
13.40
5.60
13.40
5.60
5.60
5.75
6.00
6.65
10.00
13.60
16.60
5.75
6.65
10.00
13.60
5.75
13.60
5.75
5.75
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
1.30
1.30
1.30
1.30
1.30
1.30
2.30
2.30
2.30
2.30
0.75
0.75
1.15
1.30
0.12
0.12
0.12
0.12
0.12
0.12
0.04
0.04
0.04
0.04
0.28
0.28
0.15
0.12
0.16
0.15
0.16
0.16
0.16
0.16
0.06
0.06
0.06
0.06
0.45
0.45
0.18
0.18
24V
24V
24V
24V
24V
24V
16V
16V
16V
16V
48V
48V
24V
24V
3A
3A
3A
3A
3A
3A
5A
5A
5A
5A
3A
3A
3A
3A
+10/-40
+6/-40
+6/-40
+3.5/-40
+2/-40
+1.25/-40
+5/-40
+3.5/-40
+3.5/-40
+2/-40
+10/-40
+2/-40
+10/-40
+6/-40
+24/-16V
+24/-16V
+24/-16V
+24/-16V
+24/-16V
+24/-16V
+16/-12V
+16/-12V
+16/-12V
+20/-12V
+48/-16V
+48/-16V
+24/-16V
+24/-16V
* Module height is 1.25mm. Module height of all other part numbers is 2.0mm.
†
Typical operating current is 500µA @ 5.0V which meets USB suspend mode requirement.
Table PZ2 Definitions of Terms for PolyZen Devices
V
Z
I
Zt
I
HOLD
R
Typ
R
1MAX
I
FLT
I
FLT MAX
V
INT MAX
Zener clamping voltage measured at current I
Zt
and 20°C.
Test current at which V
Z
is measured.
Maximum steady state current I
PTC
that will not generate a trip event at the specified temperature.
Ratings assume I
FLT
= 0A.
Typical resistance between V
IN
and V
OUT
pins when the device is at room temperature.
The maximum resistance between V
IN
and V
OUT
pins, at room temperature, one hour after first trip
or after reflow soldering.
Current flowing through the Zener diode.
Maximum RMS fault current the Zener diode component of the device can withstand and remain
resettable; testing is conducted at rated voltage with no load connected to V
OUT
.
The voltage (V
IN
- V
OUT
“post trip”) at which typical qualification devices (98% devices, 95%
confidence) survived at least 100 trip cycles and 24 hours trip endurance when “tripped” at the
specified voltage and current (I
PTC
).
Current flowing through the PTC portion of the circuit.
Current flowing out the V
OUT
pin of the device.
A condition where the PTC transitions to a high resistance state, thereby limiting I
PTC
, and
significantly increasing the voltage drop between V
IN
and V
OUT
.
V
IN
I
FLT
I
PTC
Polymer PTC
V
IN
Zener
Diode
GND
I
OUT
V
OUT
V
OUT
I
PTC
I
OUT
Trip Event
GND
32
RoHS Compliant, ELV Compliant
PolyZen Devices
Figure PZ2-PZ9 Typical Performance Curves for PolyZen Devices
Figure PZ2
V
OUT
Peak vs I
FLT
RMS (I
OUT
= 0)
22.0
20.0
18.0
16.0
10
Figure PZ3
Time-to-Trip vs I
FLT
RMS (I
OUT
= 0)
A
B
C
D
E
F
= ZEN056V1yyA24LS/GS
= ZEN059V130A24LS
= ZEN065V130A24LS
= ZEN098V130A24LS
= ZEN132V130A24LS
= ZEN164V130A24LS
F
E
D
Time-to-Trip (Sec)
V
OUT
Peak (V)
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0
0
1
2
3
4
5
6
A
B
C
D
E
F
= ZEN056V1yyA24LS/GS
= ZEN059V130A24LS
= ZEN065V130A24LS
= ZEN098V130A24LS
= ZEN132V130A24LS
= ZEN164V130A24LS
1
F
0.1
C
B
A
E
D
C
B
A
0.01
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
I
FLT
RMS (A)
I
FLT
RMS (A)
Figure PZ4
V
OUT
Peak vs I
FLT
RMS (I
OUT
= 0)
22.0
20.0
18.0
16.0
Figure PZ5
Time-to-Trip vs I
FLT
RMS (I
OUT
= 0)
100
D
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0
0
1
2
3
4
5
6
7
8
9
10
C
B
Time-to-Trip (Sec)
A = ZEN056V230A16LS
B = ZEN065V230A16LS
C = ZEN098V230A16LS
D = ZEN132V230A16LS
10
A = ZEN056V230A16LS
B = ZEN065V230A16LS
C = ZEN098V230A16LS
D = ZEN132V230A16LS
5
V
OUT
Peak (V)
1
A
0.1
D
B
C
A
0.01
0
1
2
3
4
5
6
7
8
9
10
I
FLT
RMS (A)
I
FLT
RMS (A)
Figure PZ6
V
OUT
Peak vs I
FLT
RMS (I
OUT
= 0)
0.0
Figure PZ7
Time-to-Trip vs I
FLT
RMS (I
OUT
= 0)
100
A = ZENxxxV1yyA24LS/GS
-0.2
A = ZENxxxV1yyA24LS/GS
B = ZENxxxV230A16LS
10
B = ZENxxxV230A16LS
C = ZENxxxV075A48LS
C = ZENxxxV075A48LS
V
OUT
Peak (V)
-0.4
Time-to-Trip (Sec)
1
-0.6
0.1
-0.8
-1.0
0.01
B
A
C
-50
-40
-30
-20
-10
0
A
B
-40
-30
-1.2
-50
C
-20
-10
0
0.001
I
FLT
RMS (A)
I
FLT
RMS (A)
Figure PZ8
Temperature Effect on I
HOLD
(I
FLT
= 0)
3.5
Figure PZ9
Time-to-Trip vs I
PTC
RMS (I
FLT
= 0)
10
A = ZENxxxV130A24LS/GS
3.0
2.5
A = ZENxxxV1yyA24LS/GS
B = ZENxxxV230A16LS
C = ZENxxxV075A48LS
B
B = ZENxxxV230A16LS
C = ZENxxxV075A48LS
D = ZENxxxV115A24LS
2.0
1.5
1.0
0.5
0.0
-40
-20
A
D
C
Time-to-Trip (Sec)
1
I
HOLD
(A)
0.1
0.01
B
C
A
40
45
0
20
40
60
80
100
0.001
0
5
10
15
20
25
30
35
Ambient Temperature (˚C)
I
PTC
RMS (A)
RoHS Compliant, ELV Compliant
33
Table PZ3 General Characteristics for PolyZen Devices
Operating temperature range
Storage temperature
ESD withstand
Diode capacitance
Construction
-40° to +85°C
-40° to +85°C
15kV
4200pF
RoHS compliant
Human body model
Typical @ 1MHz, 1V RMS
Figure PZ10-PZ23 Basic Operation Examples for PolyZen Devices
Figure PZ10
Hot-Plug Response
ZEN056V130A24LS vs a 22V/120W Universal Power Supply
35
350
C
30
Capacitive
Current Spike
Current Pulled to
GND via diode
Supply Voltage
dropped by current
A = V
IN
Supply Voltage
returns to normal
A
200
B = V
OUT
C = CURRENT (I
FLT
)
D = POWER
300
Voltage (V) and Current (A)
25
250
20
D
15
PPTC switches to
high resistance
A
Output Voltage
remains clamped
150
10
100
B
5
B
V
OUT
Peak
D
C
0.03
0.04
0.05
0.06
0.07
0.08
50
0
0
0.01
0.02
0
Time (Sec)
Figure PZ11
Typical Fault Response: ZEN056V1xxA24LS
20V, 3.5A Current Limited Source (I
OUT
=0)
20
18
Figure PZ12
Typical Fault Response: ZEN059V130A24LS
24V / 6A Current Limited Source (I
OUT
=0)
24
22
A = V
IN
(V)
B = V
OUT
(V)
C = I
FLT
(A)
A
Voltage (V) or Current (A)
A = V
IN
(V)
B = V
OUT
(V)
C = I
FLT
(A)
A
Voltage (V) or Current (A)
16
14
12
10
8
6
4
2
0
-0.02
20
18
16
14
12
10
8
6
4
B
B
C
0.02
0.06
0.10
0.14
0.18
2
0
0.02
0.05
0.10
C
0.15
Time (s)
Time (s)
Figure PZ13
Typical Fault Response: ZEN065V130A24LS
24V, 5.0A Current Limited Source (I
OUT
=0)
26
24
Figure PZ14
Typical Fault Response: ZEN098V130A24LS
24V, 3.5A Current Limited Source (I
OUT
=0)
24
A = V
IN
(V)
B = V
OUT
(V)
C = I
FLT
(A)
Voltage (V) or Current (A)
Voltage (V) or Current (A)
22
20
18
16
14
12
10
8
6
4
2
0
0
A
22
20
18
16
14
12
10
8
6
4
A = V
IN
(V)
B = V
OUT
(V)
C = I
FLT
(A)
B
C
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
2
0
0
0.05
0.10
Power (Watts)
A
B
C
0.15
5
Time (s)
Time (s)
34
RoHS Compliant, ELV Compliant
PolyZen Devices
Figure PZ16-PZ23 Basic Operation Examples for PolyZen Devices
Figure PZ15
Typical Fault Response: ZEN132V130A24LS
24V, 2.0A Current Limited Source (I
OUT
=0)
30
30
Cont’d
Figure PZ16
Typical Fault Response: ZEN164V130A24LS
24V, 1.0A Current Limited Source (I
OUT
=0)
A = V
IN
(V)
A = V
IN
(V)
Voltage (V) or Current (A)
25
A
Voltage (V) or Current (A)
B = V
OUT
(V)
C = I
FLT
(A)
25
B = V
OUT
(V)
C = I
FLT
(A)
A
B
20
20
15
B
15
10
10
5
5
C
0
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0
0
0.10
0.20
0.30
0.40
C
0.50
Time (s)
Time (s)
Figure PZ17
Typical Fault Response: ZEN056V230A16LS
16V, 5.0A Current Limited Source (I
OUT
=0)
20
Figure PZ18
Typical Fault Response: ZEN065V230A16LS
16V, 3.5A Current Limited Source (I
OUT
=0)
20
5
A
A = V
IN
(V)
A = V
IN
(V)
Voltage (V) or Current (A)
B = V
OUT
(V)
15
A
Voltage (V) or Current (A)
B = V
OUT
(V)
15
C = I
FLT
(A)
C = I
FLT
(A)
10
10
B
5
B
5
C
0
0
0.10
0.20
0.30
0
0
0.10
0.20
C
0.30
Time (s)
Time (s)
Figure PZ19
Typical Fault Response: ZEN098V230A16LS
16V, 3.5A Current Limited Source (I
OUT
=0)
18
Figure PZ20
Typical Fault Response: ZEN132V230A16LS
20V, 2.0A Current Limited Source (I
OUT
=0)
22
Voltage (V) or Current (A)
Voltage (V) or Current (A)
16
14
12
10
8
6
4
2
0
A = V
IN
(V)
B = V
OUT
(V)
C = I
FLT
(A)
A
20
18
16
14
12
10
8
6
4
2
A = V
IN
(V)
B = V
OUT
(V)
C = I
FLT
(A)
A
B
B
C
0
0.05
0.10
0.15
0.20
C
0
0.05
0.10
0.15
0.20
0.25
0.30
0
Time (s)
Time (s)
Figure PZ21
Typical Fault Response: ZEN056V075A48LS
48V, 10.0A Current Limited Source (I
OUT
=0)
50
Figure PZ22
Typical Fault Response: ZEN132V075A48LS
48V, 2.0A Current Limited Source (I
OUT
=0)
50
A = V
IN
(V)
A
Voltage (V) or Current (A)
45
40
35
30
25
20
15
10
5
A = V
IN
(V)
B = V
OUT
(V)
C = I
FLT
(A)
A
Voltage (V) or Current (A)
40
B = V
OUT
(V)
C = I
FLT
(A)
30
20
B
10
B
C
0
0
0.04
0
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
C
0.18
0.20
0
0.01
0.02
0.03
Time (s)
Time (s)
RoHS Compliant, ELV Compliant
35
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