Datenblatt-Suchmaschine für elektronische Bauteile |
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SI-3090C Datenblatt(PDF) 6 Page - List of Unclassifed Manufacturers |
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SI-3090C Datenblatt(HTML) 6 Page - List of Unclassifed Manufacturers |
6 / 7 page 40 1. Variable output voltage with a single external resistor The output voltage may be increased by inserting resistor REX between terminals No.4 (sensing terminal) and No.3 (output terminal). The cur- rent IREX flowing into terminal No.4 is 1mA (typ.)(SI-3033C:0.43mA (typ.)), therefore the adjusted output voltage VOUT is: VO=V04+IREX•REX *V04: output voltage of SI-3000C series However, the internal resistor (between terminals No. 4 and No.1) is a semiconductor resistor, which has approximately thermal characteris- tics of +0.2%/ °C. It is important to keep the thermal characteristics in mind when adjust- ing the output voltage. 2. Variable output voltage with two external resistors The output voltage may be increased by inserting resistors REX1 be- tween terminals No.4 (sensing terminal) and No.3 (output terminal) and REX2 between terminals No.4 and No.1 (ground terminal). The current I4IN flowing into terminal No.4 is 1mA (typ.)(SI-3033C: 0.43mA (typ.)) so the thermal characteristics may be improved com- pared to the method shown in 1 by setting the external current IREX1 at approximately 5 times the value of I4IN (stability coefficient S=5). The adjusted output voltage VOUT in this case is: VO=V04+REX1•IREX1 IREX1=S•I4IN The value of the external resistors may be obtained as follows: REX1= VO-V04 REX2= V04 S•I4IN , (S-1)•I4IN *V04: Output voltage of SI-3000C series S: Stability coefficient of I4IN (may be set to any value) Note: In the SI-3000C series, the output voltage increase can be ad- justed as mentioned above. However, when the rise is set to ap- proximately 10V compared to output voltage V04, the necessary output current may not be obtained due to the S.O.A. protection circuit in the SI-3000C series. GND GND OPEN 5 2 3 4 1 SI-3000C IREX REX 47 µF47µF VO V04 VIN ++ GND GND OPEN 5 2 3 4 1 SI-3000C IREX1 REX1 REX2 47 µF47µF VO I4IN V04 VIN ++ 35 20 25 30 15 10 5 0 2468 10 External Resistor REX (k Ω) VIN=VO+1V SI-3240C SI-3150C SI-3120C SI-3090C SI-3050C SI-3033C External Resistor REX1 (k Ω) 35 20 25 30 15 10 5 0 1.0 2.0 VIN=VO+1V SI-3150C REX2 =3.75k Ω SI-3033C REX2=1.9k Ω SI-3050C REX2 =1.25k Ω SI-3120C REX2 =3k Ω SI-3090C RE X2=2.25k Ω SI-3240C REX2 =6k Ω GSI-3000C Series External Variable Output Voltage Circuit |
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Ähnliche Beschreibung - SI-3090C |
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