Song Zhenghua

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In order to get high efficiency of LED drive circuit, a novel dual mode dimming LED driver based on buck DC-DC converter is presented in this paper. The peak current control mode with a slope compensation circuit is used in the buck DC-DC converter, which can drive more than 10 350mA LEDs in series with input voltage from 5V to 40V. In the chip a variety(More)
A Novel bandgap reference based on CMOS technology is presented in this paper. The main feature of the circuit is the wide input voltage range. It consists of two stages based on voltage-connection, for the first stage an improved structure is adopted to provide the relative high output voltage and for the second stage an amplifier is used to ensure the(More)
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