Dual-channel programmable precise time-delay pulse signal generator for synchronous DC-DC converter applications

摘要

A precise two-channel programmable time-delay pulse signal generator for synchronous DC-DC converter applications is presented. The developed system is required to generate high-side (HS) and low-side (LS) signal in frequency range from 1 MHz to 15 MHz and duty cycle values from 5% to 50%. While both generated signals have the same switching frequency, the pulse width and time-delay of each signal is adjusted independently of the other signal. The most notable characteristic of the developed generator is the ability to adjust dead-times between the generated signals as precise as possible in order to use the signal generator for testing the semiconductor devices for synchronous DC-DC converter applications. The developed signal generator has the ability to set the pulse width and time-delay with the precision of 250 ps. The system is designed to transmit generated signals using either the BNC or optical fiber cable. The functionality of the system is verified by measurements performed under various operating conditions.