AND8031 Datasheet, PDF (6/12 Pages) ON Semiconductor – Isolated Precision Regulation of a Single 1.8 Volt Output from a Universal Line Input

AND8031/D
Results
Table A lists the system parameters. Figure A illustrates
the single pole feedback from the circuit in Figure 1 and the
layout in Figure 13. The output current step response has a
negligible effect on the output voltage. Figure B is the output
step response of the circuit from 20% to 100%. The circuit
performance achieves the desired results for the off–line
converter. The efficiency is low, but is expected for a low
power off–line converter.
20
Gain
Phase
0
–20
–40
180
90
0
–90
–180
10 Hz
100 Hz
1 kHz
10 kHz
Figure 12. Gain and phase results from the 1.8 volt
1 ampere off–line converter.
Figure 13. Output step response from 0.2 to 1.0
Amperes.
Table 1. System Parameters
Parameter
Operating Frequency
Primary Peak Current Limit
Efficiency at 1.0 Ampere Load, 120 VACin
Efficiency at 1.0 Ampere Load, 230 VACin
Load Regulation, 120 VACin, 0.1 to 1.0 Ampere Load
Line Regulation, 1.0 Ampere Load, 90 to 265 VACin
Low Frequency Output Ripple, 1.0 Ampere Load
High Frequency Output Ripple, 1.0 Ampere Load
Value
110 kHz
230 mA
58.6 %
57.2 %
22 mV
1 mV
43 mVpp
350 mVpp
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