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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
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Status
Active: In Production.
Description
The MAX8677A 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 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.
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Data Sheet
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An evaluation kit is available: MAX8677AEVKIT
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
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Applications/Uses
- Digital Cameras
- GPS Navigation
- PDAs, Palmtops, and Wireless Handhelds
- Portable Media/MP3 Players
- Smart Cell Phones
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Key Specifications:
| Battery Chargers |
| Part Number |
Cell Chemistry |
Lithium Ion Cells |
Protected VIN
(V) |
Charging VIN
(V) |
Charge Rate Set by |
Max. ICHG
(A) |
Charge Termination |
Charge Regulation |
EV Kit |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max |
max |
≥ |
max w/pins |
See Notes |
| MAX8677A |
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1 |
16 |
6.6 |
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1.5 |
Min. Charge Current |
Linear |
Yes |
-40 to +85 |
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16.8 |
$1.95 @1k |
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See All Battery Chargers (68)
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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 prices and delivery, please see the price and availability page or contact an authorized distributor.
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| *Protected by U.S. Patent #6,507,172. |
Diagram
 Typical Operating Circuit
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX8677AETG+
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Active |
TQFN;24 pin;16.8 mm²
Outline Drawing:21-0139 (PDF)
Land Pattern: 90-0022 (PDF)
Use pkgcode/variation: T2444+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX8677AETG+T
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Active |
TQFN;24 pin;16.8 mm²
Outline Drawing:21-0139 (PDF)
Land Pattern: 90-0022 (PDF)
Use pkgcode/variation: T2444+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Similar Products by Function
Similar Products by Application
Evaluation Kits
Products with Similar Part Numbers
| MAX8677C |
1.5A Dual-Input USB/AC Adapter Charger and Smart Power Selector |
| MAX8677AEVKIT |
MAX8677A Evaluation Kit |
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-0722
Rev 1;
2007-03-06
This page last modified: 2011-01-07
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