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## HLS30ZG Datasheet(PDF) 6 Page - Power-One

 Part No. HLS30ZG Description HLS30 Series . 30A Half-Brick DC/DC Converter 48V Input 5.0V, 3.3V, 2.5V Output Download 8 Pages Scroll/Zoom 100% Maker POWER-ONE [Power-One] Homepage http://www.power-one.com Logo

## HLS30ZG Datasheet(HTML) 6 Page - Power-One

 6 / 8 page HLS30 Series – 30A Half-Brick DC/DC Converter48V InputData Sheet5.0V, 3.3V, 2.5V OutputRev. 10/01Page 6 of 8The general equation (1) for changing the outputvoltage on the standard trim modules is invariant,but the constants in the equation change due todifferent internal design.KOhm(1)where A and B are constants from the tablebelow, and ΔV is the absolute value of the desiredchange in the output voltage in Volts.Trim upTrim downModelABABHLS30ZG3.776.8111.589.88HLS30ZE2.073.923.55.61HLS30ZD1.273.921.314.95Optional Positive Trim (suffix –T)The -T option units trim up with a resistor from theTRIM pin to the +Sense pin and trim down with aresistor from the TRIM pin to the –Sense pin asshown in the Figure 9.Fig.9 HLS30 series positive trim schematicThe equations below determine the trim resistorvalue required to achieve aΔV change in theoutput voltage.%%2100%225.1%)100(VVVVVoutRUP∆∆×+−∆×∆+×=,kOhm2%100 −∆=VRDOWN, kOhmwhereΔV% is the output voltage changeexpressed in percents of the nominal outputvoltage, Vout.Notes:1.When the output voltage is trimmed up, theoutput power from the converter must notexceed its maximum rating. This isdetermined by measuring the output voltageon the output pins, and multiplying it by theoutput current.2.In order to avoid creating apparent loadregulation degradation, it is important that thetrim resistors are connected directly to theremote sense pins, and not to the load or totraces going to the load.3.The HLS30 series converters will trim downfurther than the 10% limit. In general, this ispermissible. The user must confirm that theresults are acceptable in his application.Safety ConsiderationsThe HLS30 series converters feature 1500 VoltDC isolation from input to output. The input tooutput DC resistance is greater than 10MOhm.These converters are provided with Basicinsulation between input and output circuitsaccording to all IEC60950 based standards.Nevertheless, if the system using the converterneeds to receive safety agency approval, certainrules must be followed in the design of thesystem. In particular, all of the creepage andclearance requirements of the end-use safetyrequirements must be observed. Thesedocuments include UL60950, CSA60950-00 andEN60950, although other additional requirementsmay be needed for user’s specific applications.The HLS30 series converters have no internalfuse. An external fuse must be provided toprotect the system from catastrophic failure, asillustrated in Figure 7. The fuse with a rating notgreater than 10A is recommended. The user canselect a lower rating fuse based upon the highestinrush transient at the maximum input voltageand the maximum input current of the converter atthe minimum input voltage. Both input traces andthe chassis ground trace (if applicable) must becapable of conducting a current of 1.5 times the,VVBARTRIM∆∆×−=

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