ZEN056V260A16YC Datasheet, PDF (1/8 Pages) Littelfuse – Single component placement

PolyZen
Polymer Enhanced Zener Diode
PRODUCT: ZEN056V260A16YC
DOCUMENT: SCD28844
REV LETTER: A
REV DATE: JULY 26, 2016
PAGE NO.: 1 OF 8
Specification Status: RELEASED
GENERAL DESCRIPTION
Littelfuse PolyZen devices are
polymer enhanced, precision
Zener diode. They offer
resettable protection against
multi-Watt fault events without
the need for multi-Watt heat
sinks.
PolyZen Zener diode 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 currents are large.
An advanced feature of the PolyZen devices is that the Zener
diode is thermally coupled to a resistively non-linear, polymer
PTC (positive temperature coefficient) substrate. The PTC
substrate is fully integrated into the device, and is electrically in
series between VIN and the diode clamped VOUT.
This advanced PTC substrate 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 polymer enhanced Zener diode helps protect sensitive
portable electronics from damage caused by inductive voltage
spikes, voltage transients, incorrect power supplies and reverse
bias. These devices are particularly suitable 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
 Integrated protection on over current,
over voltage, over temperature and ESD
 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
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