MAX77818EWZ 72-Bump WLP 3A Switching Battery Charger with Fuel Gauge Integrated Circuit Chip

The MAX77818EWZ integrates a 3 A switching battery charger and a pack accurate fuel gauge in one package, which is what USB powered portable devices need when board space is the limiting factor. Two inputs are supported with reverse blocking, so a USB port and a wireless or dock input can coexist without back feeding each other.

The charger includes all the power switches and runs at a high switching frequency, which keeps efficiency high and allows small external inductors and capacitors. Thermal performance stays comfortable at 3 A because the switching losses are low, so the product does not become a hand warmer during fast charge.

A USB On-the-Go boost mode lets the same port power an accessory from the battery, so a phone or tablet can supply a headset or a card reader without extra components. Input current limit and charge parameters are set over I2C, and the charger reports status back to the host for fuel gauge and charging state display.

The fuel gauge measures voltage, current and temperature and maintains state of charge in nonvolatile memory, so capacity is still accurate after a battery swap or a long power down. The 72-bump wafer level package measures 3.867 mm by 3.608 mm, and operation is specified from -40 to 85 degrees C.

The MAX77818EWZ is RoHS compliant and lead free, every order ships with full traceability, and samples and volume pricing are available on request.

• 3 A switching battery charger
• Fuel gauge in the same package
• Two inputs with reverse blocking
• All power switches integrated
• High switching frequency
• USB On-the-Go boost output
• I2C control and status
• Accurate state of charge reporting
• Nonvolatile battery history
• Low heat at full charge current
• Small 3.867 mm by 3.608 mm package
• 72-Bump (3.867mm x 3.608mm) WLP package
• RoHS compliant, lead free

• Smartphones
• Tablets
• Portable media players
• USB powered devices
• Handheld terminals
• Portable instruments

Typical use is a tablet that charges at 3 A from USB and can also power an accessory from its own port.

• 15+ years of electronic components experience
• Secure ordering process
• Excellent customer feedback
• Confirmed delivery dates
• Competitive pricing on volume orders
• Global export experience with responsive after-sales support

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