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公开(公告)号:US09136758B2
公开(公告)日:2015-09-15
申请号:US12611870
申请日:2009-11-03
申请人: Bruno Ferrario , Yun Tung Sien , Xiaofan Chen
发明人: Bruno Ferrario , Yun Tung Sien
CPC分类号: H02M3/156 , H02M1/36 , H05B33/0815 , H05B33/086
摘要: A Voltage Converting LED Circuit with Switched Capacitor Network contains a 2-way MOSFET switch that connects a capacitor network to the output of an error amplifier, thereby enabling the error amplifier to resume operation quickly after the off-time segment of a PWM cycle. The switch is controlled synchronously with current sinks controlling brightness and color levels. In a preferred embodiment, multiple serially connected strings of LED's can be controlled simultaneously via one switch.
摘要翻译: 具有开关电容网络的电压转换LED电路包含一个将电容器网络连接到误差放大器的输出的2路MOSFET开关,从而使误差放大器能够在PWM周期的关断时间段之后快速恢复运行。 该开关与控制亮度和颜色水平的电流槽同步控制。 在优选实施例中,可以通过一个开关同时控制多个串联的LED串。
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公开(公告)号:US20140191740A1
公开(公告)日:2014-07-10
申请号:US12611870
申请日:2009-11-03
申请人: Xiaofan Chen
发明人: Bruno Ferrario , Yun Tung Sien
CPC分类号: H02M3/156 , H02M1/36 , H05B33/0815 , H05B33/086
摘要: A Voltage Converting LED Circuit with Switched Capacitor Network contains a 2-way MOSFET switch that connects a capacitor network to the output of an error amplifier, thereby enabling the error amplifier to resume operation quickly after the off-time segment of a PWM cycle. The switch is controlled synchronously with current sinks controlling brightness and color levels. In a preferred embodiment, multiple serially connected strings of LED's can be controlled simultaneously via one switch.
摘要翻译: 具有开关电容网络的电压转换LED电路包含一个将电容器网络连接到误差放大器的输出的2路MOSFET开关,从而使误差放大器能够在PWM周期的关断时间段之后快速恢复运行。 该开关与控制亮度和颜色水平的电流槽同步控制。 在优选实施例中,可以通过一个开关同时控制多个串联的LED串。
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