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HLS30ZG Datasheet(PDF) 5 Page - Power-One

Part No. HLS30ZG
Description  HLS30 Series . 30A Half-Brick DC/DC Converter 48V Input 5.0V, 3.3V, 2.5V Output
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Maker  POWER-ONE [Power-One]
Homepage  http://www.power-one.com

HLS30ZG Datasheet(HTML) 5 Page - Power-One

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HLS30 Series – 30A Half-Brick DC/DC Converter
48V Input
Data Sheet
5.0V, 3.3V, 2.5V Output
Rev. 10/01
Page 5 of 8
Typical Application
connections for the HLS30 series converter.
Fig.7 Typical application of HLS30 series
The HLS30 series converters do not require any
external components for proper operation.
However, if the distribution of the input voltage to
the converter contains significant inductance, the
capacitor C1 may be required to enhance
performance of the converter. A minimum of a
47μF electrolytic capacitor with the ESR<0.7
Ω is
recommended for the HLS30 series.
If magnitude of the inrush current needs to be
limited, see the “Inrush Current Control
Application Note” on Power-One website
For output decoupling we recommend to use a
10μF tantalum and a 1μF ceramic capacitors
connected directly across the output pins of the
converter. Note, that the capacitors do not
substitute the filtering required by the load.
Shutdown Feature Description
The ON/OFF pin in the HLS30 series converters
functions as a normal soft shutdown. It is
referenced to the –Vin pin (see Figure 7). With
positive logic, when the ON/OFF pin is pulled low,
the output is turned off and the unit goes into a
very low input power mode. With negative logic,
when the ON/OFF pin is pulled low, the unit is
turned on.
An open collector switch is recommended to
control the voltage between the ON/OFF pin and
the -Vin pin of the converter. The ON/OFF pin is
pulled up internally, so no external voltage source
is required. The user should avoid connecting a
resistor between the ON/OFF pin and the +Vin
When the ON/OFF pin is used to achieve remote
control, the user must take care to insure that the
pin reference for the control is really the -Vin pin.
The control signal must not be referenced ahead
of EMI filtering or remotely from the unit. Optically
coupling the information and locating the optical
coupler directly at the module will solve any of
these problems.
If the ON/OFF pin is not used, it can be left
floating (positive logic), or connected to the -Vin
pin (negative logic).
Output Voltage Trim
The trim feature allows the user to adjust the
output voltage from the nominal value. This can
be used to compensate distribution drops,
perform margining in production, or accommodate
other requirements when output voltage needs to
be adjusted from the nominal. There are two trim
options available in the HLS30 series.
Standard Negative Trim (No suffix)
The negative trim method is the Power-One
standard. The HLS30 standard trim units trim up
with a resistor from the TRIM pin to the Sense pin
and trim down with a resistor from the TRIM Fig.8
HLS30 series negative trim schematic pin to the
+Sense pin as shown in Figure 8.
Fig. 8 HLS30 series negative trim schematic

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