发明名称 |
Digital DC-DC converter using digital modulation |
摘要 |
A digital DC-DC converter is implemented using first-order delta-sigma modulation, rather than A/D conversion. In the DC-DC converter, a PWM generator converts an input DC voltage to a preset level DC voltage according to an input PWM signal. A converter converts the DC voltage from the PWM generator to a preset level voltage. A delta-sigma modulator converts a feedback voltage Vfd corresponding to the output voltage Vout of the converter to a 1-bit digital voltage Vo according to a preset reference voltage Vref. A counter counts logic 1's in 1-bit digital voltage signals Vo from the delta-sigma modulator. A delay controller controls a high-level delay time according to the number of logic 1's counted by the counter and transfers a PWM signal having the controlled high-level delay time to the PWM generator.
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申请公布号 |
US7554308(B2) |
申请公布日期 |
2009.06.30 |
申请号 |
US20050591891 |
申请日期 |
2005.02.04 |
申请人 |
INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY |
发明人 |
ROH JEONG-JIN;PARK SUNG-JIN |
分类号 |
H02M3/157 |
主分类号 |
H02M3/157 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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