Simplified Block Diagram
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- DC Input Up to 18V
- USB Input Up to 6.5V
- Charge from USB and/or AC Adapter
- Male USB Type-B Connector
- AC-Adapter Power Jack
- Easy Configuration Changes Using Jumpers
- Cell Phones
- Digital Cameras
- Wireless Appliances
The MAX1874 EV kit has four jumpers (JU1-JU4) to easily change the battery charger's configuration. Jumper JU1 enables or disables charging, jumper JU2 selects the USB charging current for either a maximum of 100mA or 500mA, jumper JU3 allows thermistor sensing, and jumper JU4 sets the DC input fast-charge current for either 750mA or 1A. The DC input fast-charge current is also resistor-adjustable.
The DC input accepts up to 18V, but inhibits charging above 6.2V. The USB input accepts inputs up to 6.5V.