Datasheet

ExternalOutputTrimming
+Vin
(pin1)
+Vin
(pin1)
+Vout
(pin9)
+Vout
(pin9)
-Vin
(pin4)
MHB75 MHB75
-Vin
(pin4)
-Vout
(pin5)
-Vout
(pin5)
Trim
(pin7)
Trim
(pin7)
Where: istheexternalresistorRTrim-up inKohm.
Figure1:Trim-upvoltagesetup Figure2:Trim-downvoltagesetup
Where: istheexternalRTrim-down resistorinKohm.
RTrim-up
RTrim-down
R-Load
R-Load
The value of defined as:RTrim-up Thevalueof definedas:RTrim-down
(K ) (K )
(V -V ,nom)o o (V ,nom-V )o o
(R1-R2 (V -V ,nom))
o o
(R1-R2 (V ,nom-V ))
o o
= =
RTrim-up RTrim-down
Vo,nomisthenominaloutput voltage.
Voisthedesiredoutputvoltage.
R1andR2areinsidetheunitand listin Table1
Output
Voltage(V)
R1
(Kohm)
R2
(Kohm)
5V 5.8 8.25
12V 19.656 13.304
24V 42.215 16.923
Table1
Forexample,to Trim-uptheoutput
voltageof5.0Vmodel(MHB75-48S05)
by8%to5.4V, iscalculatedRTrim-up
asfollows:
Vo- Vo,nom=5.4-5.0=0.4V
R1=5.8Kohm
R2 = 8.25 Kohm
Vo,nom is the nominal output voltage.
Voisthedesiredoutput voltage.
R1andR2areinsidethe unitandlistin Table2.
Output
Voltage(V)
R1
(Kohm)
R2
(Kohm)
5V 5.810.57
12V 86.45 60.1
24V 430 130
Table2
Forexample,to Trim-downtheoutput
Voltage of 5.0Vmodel(MHB75-48S05)
by8%to4.6V, isRTrim-down
calculatedasfollows:
Vo,nom -Vo = 5.0 - 4.6=0.4V
R1=5.8Kohm
R2=10.57Kohm
) )(K (K6.25 3.93
0.4 0.4
5.8-8.25 0.4
5.8-10.57 0.4
= == =RTrim-up RTrim-down
75WDC-DCHalf-BrickRegulatedSingleOutputConverter
MH B 75 se ri e s
FileName:MHB75-SPEC2011-09-08