公开(公告)号：US20130187570A1

公开(公告)日：2013-07-25

申请号：US13744767

申请日：2013-01-18

申请人： TDK Corporation

发明人： Kazunori OSHIMA ,  Hironobu MASUOKA ,  Yukiharu MIYAOKA ,  Mitsuyuki TSUJISAKA

IPC分类号： H05B33/08

CPC分类号： H05B33/0848

摘要： A light emitting element drive device with PWM dimming includes an LED module, a power conversion circuit that supplies electric power to the LED module, a dimming switch element that performs an open/close operation for a path in which a current flows in the LED module, and a voltage detection circuit that detects a voltage value of a voltage that is output from the power conversion circuit. When the dimming switch element is turned ON, a control circuit performs feedback control so as to make a current value of the current close to a first target value. When the dimming switch element is turned OFF, the control circuit performs feedback control so as to make the voltage value close to a second target value. Wherein, the first target value is a predetermined value and the second target value is set based on the voltage value.

摘要翻译： 具有PWM调光的发光元件驱动装置包括LED模块，向LED模块提供电力的电力转换电路，对LED电流在LED模块中流动的路径执行打开/关闭操作的调光开关元件 以及检测从电力变换电路输出的电压的电压值的电压检测电路。 当调光开关元件接通时，控制电路执行反馈控制，以使电流的当前值接近第一目标值。 当调光开关元件关闭时，控制电路执行反馈控制，使得电压值接近第二目标值。 其中，第一目标值是预定值，并且基于电压值设置第二目标值。

公开(公告)号：US20130147399A1

公开(公告)日：2013-06-13

申请号：US13706984

申请日：2012-12-06

申请人： TDK Corporation

发明人： Kazunori OSHIMA ,  Hironobu MASUOKA ,  Mitsuyuki TSUJISAKA ,  Yukiharu MIYAOKA

IPC分类号： H05B37/02

CPC分类号： H05B37/02 ,  H05B33/0815 ,  H05B33/0887

摘要： A light emitting element drive device includes an electric conduction switch that is provided along a power input line, a voltage detection unit that detects a power source voltage containing a noise component when the electric power is supplied to the power input line, a conversion processing unit that converts the detected power source voltage containing the noise component to a digital value, a data generation unit that generates data of a predetermined number of bits, and a control unit that turns on the electric conduction switch. The control unit determines a delay time based on the predetermined number of bits. The delay time corresponds to a time between supplying the electric power to the power input line and turning on the electric conduction switch. The control unit turns on the electric conduction switch after the delay time passes. Thus, an excessive rush current is prevented.

摘要翻译： 一种发光元件驱动装置，包括沿着电力输入线设置的导电开关，电压检测单元，当电力被提供给电力输入线时，检测包含噪声分量的电源电压;转换处理单元 将检测到的包含噪声分量的电源电压转换为数字值，产生预定位数的数据的数据生成单元以及导通导通开关的控制单元。 控制单元基于预定位数确定延迟时间。 延迟时间对应于向电力输入线供电和接通导通开关之间的时间。 延迟时间过后，控制单元接通导通开关。 因此，防止了过大的冲击电流。

公开(公告)号：US20130099834A1

公开(公告)日：2013-04-25

申请号：US13654513

申请日：2012-10-18

申请人： TDK Corporation

发明人： Kazunori OSHIMA ,  Hironobu MASUOKA ,  Mitsuyuki TSUJISAKA ,  Yukiharu MIYAOKA

IPC分类号： H03K4/06

CPC分类号： H03K4/58 ,  H02M3/156

摘要： A ramp signal generation circuit comprises a first input terminal that receives a clock signal, a plurality of second input terminals that receive high-level or low-level signals, and a discharge and charge circuit that discharges and charges the capacitor and that outputs a ramp signal corresponding to a voltage generated by the capacitor. The discharge and charge circuit comprises a discharge circuit that discharges the capacitor, and a charge circuit that is configured with a plurality of paired resistors and rectifying elements connected between the capacitor and the plurality of second input terminals. The discharge and charge circuit selects at least one of the plurality of second input terminals so as to change a current value for charging the capacitor by inputting the high-level signal to the selected one of the plurality of second input terminals.

摘要翻译： 斜坡信号产生电路包括接收时钟信号的第一输入端子，接收高电平或低电平信号的多个第二输入端子，以及放电和充电电路，其对电容器进行放电和充电，并输出斜坡 信号对应于由电容器产生的电压。 放电和充电电路包括放电电容器，以及充电电路，其配置有连接在电容器和多个第二输入端子之间的多个成对电阻器和整流元件。 放电和充电电路选择多个第二输入端子中的至少一个，以便通过将高电平信号输入到多个第二输入端子中的所选择的一个来改变用于对电容器充电的电流值。