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YNV05T06 DC-DC Converter Data Sheet
3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 6A
Protection Features
Input Undervoltage Lockout
Input undervoltage lockout is standard with this
converter. The converter will shut down when the
input voltage drops below a pre-determined
voltage; it will start automatically when Vin returns
to a specified range.
The input voltage must be typically 2.05V for the
converter to turn on. Once the converter has been
turned on, it will shut off when the input voltage
drops below typically 1.9V.
Output Overcurrent Protection (OCP)
The converter is protected against over-current
and short circuit conditions. Upon sensing an over-
current condition, the converter will enter hiccup
mode. Once an overload or short-circuit condition
is removed, Vout will return to nominal value.
Over-Temperature Protection (OTP)
The converter will shut down under an over-
temperature condition to protect itself from
overheating caused by operation outside the
thermal derating curves, or operation in abnormal
conditions such as system fan failure. After the
converter has cooled to a safe operating
temperature, it will automatically restart.
Safety Requirements
The converter meets North American and
International safety regulatory requirements per
UL60950 and EN60950. The maximum DC
voltage between any two pins is Vin under all
operating conditions. Therefore, the unit has ELV
(extra low voltage) output; it meets SELV
requirements under the condition that all input
voltages are ELV.
The converter is not internally fused. To comply
with safety agencies requirements, a recognized
fuse with a maximum rating of 15 Amps must be
used in series with the input line.
Characterization
General Information
The converter has been characterized for many
operational aspects, to include thermal derating
(maximum load current as a function of ambient
temperature and airflow) for vertical and horizontal
mounting, efficiency, start-up and shutdown
parameters, output ripple and noise, transient
response to load step-change, overload and short
circuit.
The figures are numbered as Fig. x.y, where x
indicates the different output voltages, and y
associates with specific plots (y = 1 for the vertical
thermal derating, …). For example, Fig. x.1 will
refer to the vertical thermal derating for all the
output voltages in general.
The following pages contain specific plots or
waveforms associated with the converter.
Additional comments for specific data are provided
below.
Test Conditions
All thermal and efficiency data presented were
taken with the converter soldered to a test board.
Specifically, a 0.060” thick printed wiring board
(PWB) with four layers. The top and bottom layers
were not metalized. The two inner layers,
comprising two-ounce copper, were used to
provide traces for connectivity to the converter.
The lack of metalization on the outer layers as well
as the limited thermal connection ensured that
heat transfer from the converter to the PWB was
minimized. This provides a worst-case but
consistent scenario for thermal derating purposes.
All measurements requiring airflow were made in
vertical and horizontal wind tunnel facilities using
Infrared (IR) thermography and thermocouples for
thermometry.
Ensuring components on the converter do not
exceed their ratings is important to maintaining
high reliability. If one anticipates operating the
converter at or close to the maximum loads
specified in the derating curves, it is prudent to
check actual operating temperatures in the
application. Thermographic imaging is preferable;
if this capability is
not available, then
thermocouples may be used. Power-One
recommends the use of AWG #40 gauge
MCD10197 Rev. 1.0, 21-Jun-10
Page 7 of 25
www.power-one.com
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