A fully integrated solar charger controller is presented in this
paper. The charger has wide input voltage range about 10V to
28V for the solar-powered panel. The input loop regulation is
used here as the MPPT protection. This charger also provides
different kinds of battery voltages about 4V to 12V. The
controller system uses just one error amplifier and no external
compensation components is needed. Besides, this controller has
600 kHz PWM modulation and offers the over-current/overvoltage
protection. Other components like bandgap, reference
generator, saw-tooth generator, register controller and driver
circuits are all implemented in this circuit. This chip is
fabricated in a 0.4-m 5V/40V 2P4M process. The power
consumption of this full-integrated solar charger controller IC is
about 10mA.