参数资料
型号: MAX8903JETI+T
厂商: Maxim Integrated Products
文件页数: 15/30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
BST
VBUS
D-
D+
ID
GND
C DC
4.7 μ F
C BST
0.1 μ F
L1
1 μ H
2
PG
3 DC
4 DC
6
27 LX
28 LX
CS
25
MAX8903_
FLT
UOK
DOK
CHG
ISET
IDC
18
19
8
22
13
11
R ISET
R IDC
FAULT
OUTPUT
USB PWR-OK
DC PWR-OK
CHARGE
INDICATOR
26
CS
SYS
24
TO SYSTEM
C SYS
499k?
(SEE TABLE 5 FOR
INDUCTOR VALUE
SYS
23
LOAD
(SEE TABLE 6 FOR C SYS SELECTION)
SELECTION)
17
USB
BAT
21
DC MODE
USB
ADAPTER
OFF
CHARGE ON
5
14
DCM
CEN
BAT
VL
20
9
C VL
1 μ F
C BAT
10 μ F
R T
10k ?
1-CELL
LI+
500mA
100mA
USB SUSPEND
7
15
IUSB
USUS
THM
16
NTC
10k ?
C CT
0.15 μ F
10
CT
EP
GND
12
Figure 3. Typical Application Circuit Using a Mini 5 Style Connector or Other DC/USB Common Connector
As shown in Figure 1, the IC includes a full-featured
charger with thermistor monitor, fault timer, charger
status, and fault outputs. Also included are power-OK
signals for both USB and DC. Flexibility is maintained
with adjustable charge current, input current limit, and
a minimum system voltage (when charging is scaled
back to hold the system voltage up).
The MAX8903_ prevents overheating during high ambi-
ent temperatures by limiting charging current when the
die temperature exceeds +100°C.
Maxim Integrated
DC Input—Fast Hysteretic
Step-Down Regulator
If a valid DC input is present, the USB power path is
turned off and power for SYS and battery charging is
supplied by the high-frequency step-down regulator
from DC. If the battery voltage is above the minimum
system voltage (V SYSMIN , Figure 4), the battery charger
connects the system voltage to the battery for lowest
power dissipation. The step-down regulation point is
then controlled by three feedback signals: maximum
step-down output current programmed at IDC, maximum
charger current programmed at ISET, and maximum
15
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相关代理商/技术参数
参数描述
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