ZEN098V230A16LS Datasheet, PDF (1/9 Pages) Tyco Electronics – PolyZen Devices Polymer Protected Zener Diode

PolyZen
Polymer Enhanced Zener Diode
Micro-Assemblies
PRODUCT: ZEN098V230A16LS
DOCUMENT: SCD27861
REV LETTER: B
REV DATE: JULY 26, 2016
PAGE NO.: 1 OF 8
Specification Status: Released
GENERAL DESCRIPTION
Littefuse PolyZen devices are
polymer-enhanced, precision
Zener diode micro-assemblies.
They offer resettable protection
against multi-Watt fault events and
spare the need for large heavy
heat sinks.
A unique feature of the PolyZen
micro-assembly is that the Zener
diode is thermally coupled to a
resistively non-linear, polymer
PTC (Positive Temperature
Coefficient) layer. This PTC layer is fully integrated into the
device, and is electrically in series between VIN and the diode
clamped VOUT.
This polymer PTC layer responds to either extended diode
heating or overcurrent events by transitioning from a low to high
resistance state, also known as “tripping”. A tripped PTC will
limit current and generate voltage drop. It helps to protect both
the Zener diode and the follow-on electronics and effectively
increases the diode’s power handling capability.
The Zener diode used for voltage clamping in the PolyZen
micro-assembly was selected due to its relatively flat voltage vs
current response. This helps improve output voltage clamping,
even when input voltage is high and diode current is large.
The polymer-enhanced Zener diode helps protect sensitive
portable electronics from damage caused by inductive voltage
spikes, voltage transients, incorrect power supplies, and
reverse bias conditions. The PolyZen ZEN098V230A16LS
devices are particularly useful for portable electronics and other
low-power DC devices.
BENEFITS
 Stable Zener diode helps shield
downstream electronics from
overvoltage and reverse bias
 Trip events shut out overvoltage and
reverse bias sources
 Analog nature of trip events minimizes
upstream inductive spikes
 Minimal power dissipation requirements
 Single component placement
FEATURES
 Overvoltage transient suppression
 Stable VZ vs fault current
 Time delayed, overvoltage trip
 Time delayed, reverse bias trip
 Multi-Watt power handling capability
 Integrated device construction
 RoHS Compliant and Halogen Free
TARGET APPLICATIONS
 DC power port protection in portable
electronics
 DC power port protection for systems
using
barrel jacks for power input
 Internal overvoltage & transient
suppression
 DC output voltage regulation
TYPICAL APPLICATION BLOCK DIAGRAM
Power Supply
(External or Internal)
PolyZen Protected Electronics
GND
2
V_{IN 1 PolyZen}
+
Device
V_OUT
3 Regulated
Output
R_Load
Protected downstream
electronics
© 2016 Littelfuse,Inc.
Specifications are subject to change without notice.
Revised July 26, 2016
littelfuse.com