MAX8677A
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
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
| Charging VIN (V) (max) | 6.6 |
| Max. ICHG (A) | 1.5 |
| Cell Chemistry | Li-Ion Li-Polymer |
| # Lithium Ion Cells | 1 |
| Protected VIN (V) (max) | 16 |
| Charger (V) | 4.2 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | TQFN/24 |
| Budgetary Price (See Notes) | 2.74 |
Simplified Block Diagram
Technical Docs
| Data Sheet | 1.5A Dual-Input, USB/AC Adapter Charger and Smart Power Selector | Mar 06, 2007 | |
| App Note | Lithium-Ion Battery Recycling Made Easy |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.
Parameters
| Charging VIN (V) (max) | 6.6 |
| Max. ICHG (A) | 1.5 |
| Cell Chemistry | Li-Ion Li-Polymer |
| # Lithium Ion Cells | 1 |
| Protected VIN (V) (max) | 16 |
| Charger (V) | 4.2 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | TQFN/24 |
| Budgetary Price (See Notes) | 2.74 |
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 CHG, Active-Low DOK, Active-Low UOK, and Active-Low FLT Indicators
- 5.3V (typ) SYS Regulation Voltage
Applications/Uses
- Digital Cameras
- GPS Navigation
- PDAs, Palmtops, and Wireless Handhelds
- Portable Media/MP3 Players
- Smart Cell Phones
Description
The MAX8677A 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 MAX8677A is available in a 4mm x 4mm, 24-pin TQFN-EP package.
Technical Docs
| Data Sheet | 1.5A Dual-Input, USB/AC Adapter Charger and Smart Power Selector | Mar 06, 2007 | |
| App Note | Lithium-Ion Battery Recycling Made Easy |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.
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