YV09T60 60A DC-DC POL Converter
5V to 13.8V Input
• 0.6V to 1.98V Output
Data Sheet
ZD-01724 Rev 3.4, 07-Nov-10 www.power-one.com Page 11 of 14
6.4 Remote Sense (Pins 10 and 11)
The remote sense feature compensates for the
voltage drop between the output pins of the POL
converter and the load. The Sense- (Pin 10) and
Sense+ (Pin 11) pins should be connected at the
load or at the point where regulation is required
(refer to Figure 19).
If remote sensing is not required, the Sense pins
must be connected to the Vout and GND pins
directly at the output of the POL converter.
Vin
Vin
GND
ON/OFF
Converter
Vout
3,7,8
12,13,14
15,16,18,20,22,24
9
YV-Series
Power Good
4
TRIM+
1
SENSE+
11
Rload
GND
17,19,21,23
TRIM-
5
SENSE-
10
Rw
Rw
Figure 19. Remote Sense Circuit Configuration
Because the sense leads carry minimal current,
large traces on the end-user board are not required.
The voltage sense traces should be located close to
a ground plane to minimize system noise.
When using remote sense, the output voltage at the
converter can be increased by up to 0.5V in order to
maintain the required voltage at the load. However,
the maximum output voltage measured directly
between the Vout and GND pins shall not exceed
1.98V. In addition it is the user’s responsibility to
ensure the POL converter’s actual output power
always remains at or below the maximum allowable
output power obtained from the derating curves.
6.5 Protections
6.5.1 Power Good
Power Good pin (Pin 4) is an open drain output,
capable of sinking up to 4mA. The Power Good pin
is high when the output voltage is within the
regulation band. The Power Good pin is at logic low
during start-up, undervoltage, overvoltage or
overcurrent conditions, or when the POL converter is
disabled via the ON/OFF signal.
6.5.2 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.
6.5.3 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.
6.5.4 Output Overvoltage Protection
The POL converter is protected against overvoltage
on the output. If the output voltage is higher than
125% of its nominal value set by the R
TRIM
, the high
side MOSFETS will be immediately turned off and
the low side MOSFETs 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 20.
Vout
Vsource
470uF
POS
capacitor
1 µH
DC/DC
Converter
100uF
tantalum
+ 47µF
ceramic
C
IN
YV-Series
Figure 20. Test Setup For Measuring Input Reflected-Ripple
Current
And Output Voltage Ripple
8. Safety
The YV09T60 POL converters do not provide
isolation from input to output. The input devices
powering YV09T60 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.
