Title: Feedback circuit adapted for series resonance dc-dc converter
Application Number: 200610061463 Application Date: 2006.06.30
Publication Number: 1909351 Publication Date: 2007.02.07
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02M3/28;G05F1/46
Applicant(s) Name: Emerson Network Power Co., Ltd. Address:
Inventor(s) Name: Ren Zhaohua
Attorney & Agent:
Abstract:
    The invention relates to a feedback circuit used in serial resonance direct-current-direct-current converter and a relative device, wherein said circuit comprises: two voltage adjusters and two current adjusters, to form one new feedback circuit to generate frequency-variable modulate signal and impulse-width modulate signal; said feedback circuit uses two dual-ring controllers with frequency-variable modulate (PFM) and impulse-width modulate (PWM) as voltage external rings and voltage internal ring; the frequency-variable modulate (PFM) dual-ring controller and the impulse-width modulate (PWM) dual-ring controller can automatically switch, whose annular parameters can be set independently; the de-resonance converter can work in impulse-width modulate (PWM) and frequency-variable modulate (PFM) states to adjust and compensate two groups of annular parameters to meet the demands of output stable voltage at light load or idle load.
Time: 6