AGF600-48S30 DC-DC Converter
10/15
thanꢀ10%ꢀcanꢀcauseꢀtheꢀmoduleꢀtoꢀregulateꢀimproperly.ꢀIfꢀtheꢀtrimꢀpinꢀisꢀnotꢀneeded,ꢀitꢀshouldꢀbeꢀleftꢀ
open.ꢀ
Rup
Load
+S
+
+Vo
+
ꢁ
ꢁVo
ꢁS
Trim
Rdown
ꢀ
Figureꢀ14ꢀ ꢀ Trimꢀcircuitꢀ
−
V
V
o
e
Rup = 30(
)kꢀ ꢀ ꢀ ꢀ
V
e
V
o
V
Rdown = −5.97(
)kꢀ ꢀ
−
V
o
e
VeꢀisꢀtheꢀratedꢀoutputꢀvoltageꢀandꢀVoꢀisꢀtheꢀgoalꢀvoltage.ꢀ
Forꢀexample,ꢀtoꢀgetꢀ33Vꢀoutput,ꢀtheꢀresistorꢀis:ꢀ
33−30
Rup = 30(
)kꢀ = 3kꢀ ꢀ
30
Forꢀanotherꢀexample,ꢀtoꢀgetꢀ15Vꢀoutput,ꢀtheꢀresistorꢀis:ꢀ
15
Rdown = −5.97(
)kꢀ = 5.97kꢀ ꢀ
15−30
Takeꢀnoteꢀthatꢀwhenꢀoutputꢀvoltageꢀisꢀincreased,ꢀinputꢀvoltageꢀshouldꢀbeꢀlimitedꢀisꢀshownꢀinꢀtheꢀ
followingꢀfigure.ꢀ
Max.
output
voltage
33. 0V
30.8 V
36V
39V
75V
Inputꢀvoltage
ꢀ
Figureꢀ15ꢀ ꢀ Trimꢁupꢁableꢀvoltageꢀvs.ꢀinputꢀvoltageꢀ
SenseꢀCharacteristicsꢀ
Ifꢀ theꢀ loadꢀ isꢀ farꢀ fromꢀ theꢀ unit,ꢀ connectꢀ S+ꢀ andꢀ Sꢁꢀ toꢀ theꢀ terminalꢀ ofꢀ theꢀ loadꢀ respectivelyꢀ toꢀ
compensateꢀtheꢀvoltageꢀdropꢀonꢀtheꢀtransmissionꢀline.ꢀSeeꢀFigureꢀ11.ꢀ
Ifꢀtheꢀsenseꢀcompensationꢀfunctionꢀisꢀnotꢀnecessary,ꢀshortꢀS+ꢀtoꢀVo+ꢀandꢀSꢁꢀtoꢀVoꢁꢀrespectively.ꢀ
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