Fig. 1. Structure of whole system

Fig. 2. Schematic of automatic current control module

Fig. 3. Loop simplified equivalent model and small signal model analysis

Fig. 4. Artificial analysis of logarithmic amplitude-frequency characteristic curve of Vf/Vout

Fig. 5. Tina SPICE simulation analysis of logarithmic amplitude-frequency characteristic curve of Vf/Vout

Fig. 6. First-order manual analysis of stability of LOOP#2

Fig. 7. Tina SPICE simulation results of circuit before frequency compensation

Fig. 8. Transient response analysis of automatic current control module before frequency compensation

Fig. 9. Circuit of automatic current control module Tina SPICE simulation

Fig. 10. Tina SPICE simulation analysis of circuit after frequency compensation

Fig. 11. Transient response analysis of automatic current control module after frequency compensation

Fig. 12. Anti-interference analysis of automatic current control module after frequency compensation

Fig. 13. Voltage waveform of Vout. (a) Voltage waveform before frequency compensation; (b) voltage waveform after frequency compensation

Fig. 14. Current stability test

Fig. 15. Linearity test of automatic power control

Fig. 16. Power stability test

Fig. 17. Temperature stability test