MAX8677C

1.5A Dual-Input USB/AC Adapter Charger and Smart Power Selector

Optimized Smart Power Control Maximizes Charger Rate from USB/AC-Adapter Power While Supporting System Load


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Description

The MAX8677C is an integrated 1-cell Li+ charger and Smart Power Selector™ with dual (DC and USB) power inputs. It can operate with either separate inputs for USB and AC adapter power*, or from a single input that accepts both. All power switches for charging and switching the load between battery and external power are included on-chip. No external MOSFETs are required.

The MAX8677C features a Smart Power Selector to make the best use of limited USB or adapter power. The battery charge current and input current limit are independently set up to 1.5A and 2A, respectively. Input power not used by the system charges the battery. USB input current can be set to 100mA or 500mA. Automatic input selection switches the system load from battery to external power.

Other features include overvoltage protection (OVP), charge status and fault outputs, power-OK monitors, charge timer, and battery thermistor monitor. Additionally, on-chip thermal limiting reduces the battery charge rate to prevent overheating. The MAX8677C is available in a 4mm x 4mm, 24-pin TQFN-EP package.
MAX8677C: Functional Block Diagram MAX8677C: Functional Block Diagram Enlarge+

Key Features

  • Complete Charger and Smart Power Selector
  • No External MOSFETs Required
  • Common or Separate USB and Adapter Inputs
  • System Operates with Discharged or No Battery
  • Automatic Adapter/USB/Battery Switchover
  • Load Peaks Over Adapter Rating Are Supported by Battery
  • Input Overvoltage Protection to 16V
  • 40mΩ System-to-Battery Switch
  • Thermal Regulation Prevents Overheating
  • Active-Low PREQ, Active-Low CHG, Active-Low DOK, Active-Low UOK, and Active-Low FLT Indicators
  • 4.35V (typ) SYS Regulation Voltage

Applications/Uses

  • Digital Cameras
  • GPS Navigation
  • PDAs, Palmtops, and Wireless Handhelds
  • Portable Media/MP3 Players
  • Smart Cell Phones
Part NumberLithium Ion CellsProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxmaxSee Notes
MAX8677C 1166.6
Logic Input
Resistor
1.5Min. Charge CurrentLinear-40 to +85
TQFN/24
$2.20 @1k
See All Battery Chargers (74)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Quality and Environmental Data

Product Reliability Reports: MAX8677C.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
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