HA16114P/PJ/FP/FPJ, HA16120FP/FPJ
2. DC/DC Output Voltage Setting and Error Amplifier Usage
2.1 DC/DC Output Voltage Setting
1. Positive Output Voltage (VO > Vref)
HA16114 with step-down topology
HA16120 with step-down (boost) topology
CL
CL
VIN
VIN
EA
EA
IN(−)
IN(−)
OUT
−
−
VO
IN(+)
IN(+)
VO
+
+
OUT
+
GND
GND
−
+
Vref
Vref
−
R2
R1
R2
R1
R1 + R2
VO = Vref ×
R2
Figure 2.1 Output Voltage Setting (1)
2. Negative Output Voltage (VO < 0 V)
HA16114 with inverting topology
CL
VIN
EA
OUT
−
IN(−)
+
IN(+)
Vref
−
+
R3
R4
R2
VO = −Vref ×
R1
R1 + R2
R2
R3
×
− 1
R3 + R4
Figure 2.2 Output Voltage Setting (2)
Rev.2.0, Sep.18.2003, page 9 of 37