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参数资料
型号： MAX8903HETI+
厂商： Maxim Integrated Products
文件页数： 1/30页
文件大小： 0K
描述： IC DCDC CHRGR LI+ 1CELL 28TQFN
标准包装： 75
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： *
封装/外壳： *
供应商设备封装： *
包装： *
EVALUATION KIT AVAILABLE
MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
General Description
Features
The MAX8903A –MAX8903E/MAX8903G/MAX8903H/
MAX8903J/MAX8903N/MAX8903Y are integrated 1-cell
Li+ chargers and Smart Power Selectors? with dual
(AC adapter and USB) power inputs. The switch mode
charger uses a high switching frequency to eliminate
heat and allow tiny external components. 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, blocking diodes, or cur-
rent-sense resistors are required.
The MAX8903_ features optimized smart power control
to make the best use of limited USB or adapter power.
Battery charge current and SYS output current limit are
o
o
o
o
o
o
o
o
Efficient DC-DC Converter Eliminates Heat
4MHz Switching for Tiny External Components
Instant On—Works with No/Low Battery
Dual Current-Limiting Inputs—AC Adapter or USB
Automatic Adapter/USB/Battery Switchover to
Support Load Transients
50m ? System-to-Battery Switch
Supports USB Spec
Thermistor Monitor
Integrated Current-Sense Resistor
No External MOSFETs or Diodes
4.1V to 16V Input Operating Voltage Range
Ordering Information
independently set. Power not used by the system
charges the battery. Charge current and SYS output cur-
rent limit can be set up to 2A while USB input current can
be set to 100mA or 500mA. Automatic input selection
switches the system from battery to external power. The
DC input operates from 4.15V to 16V with up to 20V pro-
tection, while the USB input has a range of 4.1V to 6.3V
with up to 8V protection.
The MAX8903_ internally blocks current from the bat-
tery and system back to the DC and USB inputs when
no input supply is present. Other features include pre-
qual charging and timer, fast charge timer, overvoltage
protection, charge status and fault outputs, power-OK
PART
MAX8903A ETI+T
MAX8903B ETI+T
MAX8903C ETI+T
MAX8903D ETI+T
MAX8903E ETI+T
MAX8903G ETI+T
MAX8903H ETI+T
MAX8903J ETI+T
MAX8903N ETI+T
MAX8903Y ETI+T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 Thin QFN-EP*
28 Thin QFN-EP*
28 Thin QFN-EP*
28 Thin QFN-EP*
28 Thin QFN-EP*
28 Thin QFN-EP*
28 Thin QFN-EP*
28 Thin QFN-EP*
28 Thin QFN-EP*
28 Thin QFN-EP*
monitors, and a battery thermistor monitor. In addition,
on-chip thermal limiting reduces battery charge rate
and AC adapter current to prevent charger overheat-
ing. The MAX8903_ is available in a 4mm x 4mm, 28-pin
thin QFN package.
The various versions of the MAX8903_ allow for design
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
T = Tape and reel.
Typical Operating Circuit
flexibility to choose key parameters such as system
regulation voltage, battery prequalification threshold,
and battery regulation voltage. The MAX8903B/
AC
ADAPTER
OR USB
DC
LX
CS
SYS
MAX8903E/MAX8903G also includes power-enable on
battery detection. See the Selector Guide section for
complete details.
Applications
CHARGE
CURRENT
LOAD
CURRENT
CHARGE
AND
SYSTEM
LOAD
PDAs, Palmtops, and
Wireless Handhelds
Personal Navigation
Portable Multimedia
Players
Mobile Internet Devices
PWM
STEP-DOWN
SYS LOAD
SWITCH
Devices
Ultra Mobile PCs
USB
USB
BAT
BATTERY
Smart Cell Phones
Selector Guide appears at end of data sheet.
Visit www.maximintegrated.com/products/patents for
product patent marking information.
MAX8903_
GND
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
Pin Configuration appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4410; Rev 5; 9/11
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相关代理商/技术参数
参数描述
MAX8903HETI+ 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
MAX8903HETI+C58 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
MAX8903HETI+C64 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
MAX8903HETI+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
MAX8903HETI+TW 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
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