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MAX8677CETG+

更新时间： 2024-11-25 13:11:07
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美信 - MAXIM /
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19-0722; Rev 1; 1/07  
1.5A Dual-Input USB/AC Adapter Charger  
and Smart Power Selector  
MX867A  
General Description  
Features  
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.  
o Complete Charger and Smart Power Selector  
o No External MOSFETs Required  
o Common or Separate USB and Adapter Inputs  
o System Operates with Discharged or No Battery  
o Automatic Adapter/USB/Battery Switchover  
o Load Peaks Over Adapter Rating Are Supported  
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 bat-  
tery. USB input current can be set to 100mA or 500mA.  
Automatic input selection switches the system load  
from battery to external power.  
by Battery  
o Input Overvoltage Protection to 16V  
o 40mΩ System-to-Battery Switch  
o Thermal Regulation Prevents Overheating  
o CHG, DOK, UOK, and FLT Indicators  
o 5.3V (typ) SYS Regulation Voltage  
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.  
Ordering Information  
PIN-  
PKG  
PART  
TEMP RANGE  
PACKAGE  
CODE  
24 TQFN-EP  
(4mm x 4mm)  
MAX8677AETG+ -40°C to +85°C  
+Denotes a lead-free package.  
T2444-4  
.
Applications  
PDAs, Palmtops, and Wireless Handhelds  
Smart Cell Phones  
Portable Media/MP3 Players  
GPS Navigation  
Pin Configuration  
Digital Cameras  
18 17 16 15 14 13  
CHG 19  
SYS 20  
SYS 21  
DOK 22  
UOK 23  
FLT 24  
12 THM  
11 ISET  
10 CT  
Typical Operating Circuit  
AC  
ADAPTER  
SYS  
MAX8677A  
DC  
Q1  
9
8
7
GND  
VL  
CHARGE  
LOAD  
CURRENT  
CURRENT  
SYSTEM  
LOAD  
PSET  
1
2
3
4
5
6
USB  
USB  
Q2  
Q3  
BAT  
BATTERY  
CHARGE AND  
SYS LOAD  
SWITCH  
TQFN  
(4mm x 4mm x 0.8mm)  
GND  
MAX8677A  
*Protected by US Patent #6,507,172.  
Smart Power Selector is a trademark of Maxim Integrated  
Products, Inc.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
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MAX8677CETG+ 替代型号

型号 品牌 替代类型 描述 数据表
MAX8677CETG+T MAXIM

完全替代

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