Title :
Fully digitalized switch-mode LED driver without ADC
Author :
Jae-Hyoun Park ; Hyung-Do Yoon
Author_Institution :
Photonic Convergence Res. Center, Korea Electron. Technol. Inst., Seongnam, South Korea
Abstract :
A digitalized switch-mode LED driver is implemented using a 0.35μm high voltage process, which featured by no use of any ADCs. The comparison result between the output current and the desired current causes the counter to increase or decrease its binary value which determines the duty ratio of the PWM signal. This PWM signal controls switching devices. A delay routine added in the counter prevents oscillation of the counter value owing to a high speed clock.
Keywords :
driver circuits; light emitting diodes; switched mode power supplies; PWM signal; duty ratio; fully digitalized switch-mode LED driver; switching devices; Capacitors; Flowcharts; Light emitting diodes; Photonics; Pulse width modulation; Radiation detectors; Switches; LED driver; digitalized; without ADC;
Conference_Titel :
SoC Design Conference (ISOCC), 2014 International
DOI :
10.1109/ISOCC.2014.7087630
