- Patent Title: Modulation mode control circuit, switch control circuit including the modulation mode control circuit and power supply device including the switch control circuit
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Application No.: US14965238Application Date: 2015-12-10
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Publication No.: US09812856B2Publication Date: 2017-11-07
- Inventor: Won-Tae Lee , Ji-Hoon Jang , Hyeong Seok Baek
- Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
- Applicant Address: KR Bucheon
- Assignee: Fairchild Korea Semiconductor Ltd.
- Current Assignee: Fairchild Korea Semiconductor Ltd.
- Current Assignee Address: KR Bucheon
- Main IPC: H02H3/247
- IPC: H02H3/247 ; H02M3/335 ; H02M1/00 ; H02M1/32 ; H02M1/36
Abstract:
A modulation mode control circuit includes a modulation mode controller configured to select modulation mode based on the result of a comparison between a control voltage and a predetermined PWM threshold voltage and to generate a PWM reference voltage using the PWM threshold voltage and the control voltage and a control signal generation unit configured to generate a first control signal based on the result of a comparison between an oscillation control signal for controlling a switching frequency and the control voltage and the result of a comparison between the oscillation control signal and the PWM threshold voltage and to generate a second control signal based on the result of a comparison between the oscillation control signal and the PWM reference voltage.
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