This USB charger circuit is designed using the MAX1555 IC circuit
manufactured by Maxim Semiconductor This MAX1555 USB charger can be
used using the USB power or AC power.This MAX1555 charger is charging at
100mA from USB port and the maximum charging current increases to 350mA
if the USB the AC adapter is connected . If both power types are
connected in the same time the AC adapter is automatically given
precedence.
USB Charger Circuit diagram
This charger can be used for small devices like : PDAs ,Cell Phones , Digital Cameras , MP3 Players and other.The charger can be used for Li-Ion or Li-Polymer batteries . The electronic project charger circuit require a input voltage between 3V and 7 V and deliver an 3.3 V output voltage.As you can see in the circuit diagram , before the IC is connected the MAX8881 linear regulator IC which is capable to deliver up to 200mA.The MAX1881 is specially designed for battery-powered applications where reverse battery protection and long battery life are critical.
USB Charger Circuit diagram
This charger can be used for small devices like : PDAs ,Cell Phones , Digital Cameras , MP3 Players and other.The charger can be used for Li-Ion or Li-Polymer batteries . The electronic project charger circuit require a input voltage between 3V and 7 V and deliver an 3.3 V output voltage.As you can see in the circuit diagram , before the IC is connected the MAX8881 linear regulator IC which is capable to deliver up to 200mA.The MAX1881 is specially designed for battery-powered applications where reverse battery protection and long battery life are critical.
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