The charger facilitates smooth and stable
transition from constant current (CC) mode to constant
voltage (CV) mode without the need of extra switch or control
loop. The novel feedback clamped digital hysteretic modulator
used in the charger generates carrier to the hysteretic
comparator in the field programmable gate array (FPGA)
based digital domain by generating piece-wise linear synthetic
ripple using sensed converter voltages (switch node voltage and
the output voltage), without the need of direct inductor current
sensing and adding the output voltage to it.