UPC1934GR-PJG 查看數據表（PDF） - NEC => Renesas Technology
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UPC1934GR-PJG Datasheet PDF : 20 Pages
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µ PC1934
3. NOTES ON USE
3.1 Setting the Output Voltage
Figure 3-1 illustrates the method of setting the output voltage. The output voltage is obtained using the formula shown in
the figure.
The common mode input voltage range of the error amplifier is 0 to 0.4 V (TYP.) for both the error amplifiers, E/A1 and
E/A2. Therefore, select a resistor value that gives this voltage range.
Figure 3-1 Setting the Output Voltage
(1) When setting a positive output voltage using error amplifier E/A1.
VOUT (positive voltage)
VOUT =
1 + R1
R2
•
R4
R3 + R4
•
VREF
R1
16 VREF
4
CNF
R3
R2
3
R4
RNF
5
E/A1
(2) When setting a negative output voltage using error amplifier E/A2.
R1
R2
R3
R4
16 VREF
13
CNF
14
RNF
12
E/A2
VOUT (negative voltage)
VOUT = R1R4−R2R3 • VREF
R1 (R3+R4)
12
Data Sheet G13567EJ3V0DS00
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