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参数资料
| 型号： | MAX8677CETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/21页 |
| 文件大小： | 0K |
| 描述： | IC USB/AC ADP CHARGER 24-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4.1 V ~ 6.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
560k Ω
3X 560k Ω
TO VL
MINI 5-STYLE
CONNECTOR
PREQUAL
1
PREQ
MAX8677C
FLT
24
FAULT
OUTPUT
VBUS
D-
D+
ID
1
2
3
4
C DC
4.7 μ F
2
3
DC
DC
UOK
DOK
23
22
USB PWR
OK
DC PWR
OK
OFF
GND
5
CHARGE
ON
HI = DC
DC-USB ID
LO = USB
500mA
100mA
R PSET
4
5
6
7
8
CEN
PEN1
PEN2
PSET
VL
SYS
SYS
CHG
BAT
BAT
21
20
19
18
17
C SYS
10 μ F
560k Ω
C BAT
4.7 μ F
TO SYSTEM
LOAD
TO VL
CHARGE
INDICATOR
1-CELL
Li+
C L
0.1 μ F
C T
0.068 μ F
9
10
11
GND
CT
ISET
USB
USB
TSET
16
15
14
R ISET
12
THM
USUS
13
TO VL: I TERM = 15%
OPEN: I TERM = 10%
10k Ω
NTC
10k Ω
+25 ° C
GND: I TERM = 5%
USB SUSPEND
Figure 3. Typical Application Circuit Using Mini 5-Style Connector or Other DC/USB Common Connector
In some instances, there may not be enough adapter
current or USB current to supply peak system loads.
The MAX8677C Smart Power Selector circuitry offers
flexible power distribution from an AC adapter or USB
source to the battery and system load. The battery is
charged with any available power not used by the sys-
tem load. If a system load peak exceeds the input
current limit, supplemental current is taken from the bat-
tery. Thermal limiting prevents overheating by reducing
power drawn from the input source. In the past, it might
have been necessary to reduce system functionality to
limit current drain when a USB source is connected.
However, in the MAX8677C, this is no longer the case.
When the DC or USB source hits its limit, the battery
supplies supplemental current to maintain the load.
12
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