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CURRENT DRIVER, LED DRIVE CIRCUIT, LIGHTING DEVICE AND ELECTRONIC APPARATUS
CURRENT DRIVER, LED DRIVE CIRCUIT, LIGHTING DEVICE AND ELECTRONIC APPARATUS
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机译:电流驱动器,LED驱动电路,照明设备和电子设备
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摘要
A current driver connected with light emitting diode (LED) bars of the maximum number N of channels and driving LED bars of M channels to be driven, includes: PWM input terminal configured to receive PWM-modulated external dimming pulse having duty cycle with a target light quantity common to the LED bars of the M channels; pulse measurement circuit configured to measure period and pulse width of the external dimming pulse and generate digital period data and pulse width data; interface circuit connected to external processor and configured to receive enable data and phase difference setting data; M current sources of the M channels to be driven and respectively connected with corresponding LED bars, and configured to be On-and-Off-switched in response to internal dimming pulse; and pulse generator configured to generate M internal dimming pulses and distribute the M internal dimming pulses to the M current sources.
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