参数资料
型号: MAX8903JETI+T
厂商: Maxim Integrated Products
文件页数: 14/30页
文件大小: 0K
描述: IC DC/DC CHARGER LI+ 2A 28-TQFN
产品培训模块: Obsolescence Mitigation Program
标准包装: 2,500
系列: Smart Power Selector™
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 ~ 16 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(4x4)
包装: 带卷 (TR)
MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
R PU
4 x 100k ?
TO VL
1
PG
ADAPTER
C DC
4.7 μ F
2
PG
3 DC
4 DC
6
BST
MAX8903_
FLT
UOK
DOK
CHG
18
19
8
22
FAULT
OUTPUT
USB PWR OK
DC PWR OK
CHARGE
INDICATOR
C BST
0.1 μ F
27 LX
13
R ISET
ISET
28 LX
C SYS
L1
1 μ H
(SEE TABLE 5 FOR
INDUCTOR SELECTION)
25
26
CS
CS
IDC
SYS
SYS
11
24
23
R IDC
TO SYSTEM
LOAD
(SEE TABLE 6 FOR C SYS SELECTION)
USB
VBUS
GND
C USB
4.7 μ F
17
USB
BAT
BAT
21
20
C BAT
10 μ F
1-CELL
LI+
TO DC
5
DCM
OFF
CHARGE ON
500mA
100mA
14
7
CEN
IUSB
VL
THM
9
16
C VL
1 μ F
R T
10k ?
USB SUSPEND
15
USUS
NTC
10k ?
C CT
0.15 μ F
10
CT
EP
GND
12
Figure 2. Typical Application Circuit Using a Separate DC and USB Connector
Circuit Description
The MAX8903_ is a dual input charger with a 16V input
for a wide range of DC sources and USB inputs. The IC
includes a high-voltage (16V) input DC-DC step-down
converter that reduces charger power dissipation while
also supplying power to the system load. The step-
down converter supplies up to 2A to the system, the
battery, or a combination of both.
14
A USB charge input can charge the battery and power
the system from a USB power source. When powered
from USB or the DC input, system load current peaks
that exceed what can be supplied by the input are sup-
plemented by the battery.
The MAX8903_ also manages load switching from the
battery to and from an external power source with an
on-chip 50m ? MOSFET. This switch also helps support
load peaks using battery power when the input source
is overloaded.
Maxim Integrated
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MAX8903NETI+ 功能描述:电池管理 2A 1-Cell Li+ DC-DC Charger for USB and Adapter Power RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
MAX8903NETI+T 功能描述:电池管理 2A 1-Cell Li+ DC-DC Charger for USB and Adapter Power RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
MAX8903YETI+ 功能描述:电池管理 Dual AC/USB Powered 1-Cell Li+ Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
MAX8903YETI+C67 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
MAX8903YETI+T 功能描述:电池管理 Dual AC/USB Powered 1-Cell Li+ Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel