YEV09T10 Datasheet, PDF (10/12 Pages) Power-One – 10A DC-DC POL Converter 4.5V to 13.8V Input 0.59V to 5.1V Output

YEV09T10 10A DC-DC POL Converter
4.5V to 13.8V Input  0.59V to 5.1V Output
Data Sheet
6.4 Protections
6.4.1 Input Undervoltage Lockout
The POL converter will shut down when the input
voltage drops below a predetermined voltage. It will
start automatically when the input voltage exceeds
the specified threshold.
6.4.2 Output Overcurrent Protection
The POL converter is protected against overcurrent
and short circuit conditions. Upon sensing an
overcurrent condition, the POL converter will enter
hiccup mode of operation. Once the overload or
short circuit condition is removed, the POL converter
will automatically restart and Vout will return to its
nominal value.
6.4.3 Output Overvoltage Protection
The POL converter is protected against overvoltage
on the output. If the output voltage is higher than
115% of its nominal value set by the R_TRIM, the high
side MOSFET will be immediately turned off and the
low side MOSFET will be turned on. The POL
converter will remain in the state until the output
voltage reduces below 115% of its nominal value. At
that point the POL converter will automatically
restart.
7. Characterization
7.1 Ripple and Noise
The output voltage ripple and input reflected ripple
current waveforms are measured using the test
setup shown in Figure 21.
1H
V source
CIN
100 F
tantalum
+2x10F
ceramic
YEV09T10
DC/ DC
Converter
22 F
ceramic _Vout
capacitor
8. Safety
The YEV09T10 POL converters do not provide
isolation from input to output. The input devices
powering YEV09T10 must provide relevant isolation
requirements according to all IEC60950 based
standards. Nevertheless, if the system using the
converter needs to receive safety agency approval,
certain rules must be followed in the design of the
system. In particular, all of the creepage and
clearance requirements of the end-use safety
requirements must be observed.
These
requirements are included in UL60950 - CSA60950-
00 and EN60950, although specific applications may
have other or additional requirements.
The YEV09T10 POL converters have no internal
fuse. If required, the external fuse needs to be
provided to protect the converter from catastrophic
failure. Refer to the “Input Fuse Selection for DC/DC
converters” application note on www.power-one.com
for proper selection of the input fuse. Both input
traces and the chassis ground trace (if applicable)
must be capable of conducting a current of 1.5 times
the value of the fuse without opening.
To comply with safety agencies’ requirements, a
recognized fuse must be used in series with the input
line. The fuse must not be placed in the grounded
input line. Abnormal and component failure tests
were conducted with the POL input protected by a
fast-acting 25A fuse. If a fuse rated greater than 25A
is used, additional testing may be required.
The maximum DC voltage between any two pins is
Vin under all operating conditions. In order for the
output of the YEV09T10 POL converter to be
considered as SELV (Safety Extra Low Voltage),
according to all IEC60950 based standards, the input
to the POL needs to be supplied by an isolated
secondary source providing a SELV also.
Figure 21. Test Setup For Measuring Input Reflected-Ripple
Current And Output Voltage Ripple
ZD-02092 Rev 1.1, 25-Mar-09
www.power-one.com
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