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| 型号： | MAX8922LETB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY CHARGER SGL 10TDFN |
| 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） |
| 电源电压： | 0 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN EP（3x2） |
| 包装： | 带卷 (TR) |
19-4929; Rev 1; 4/10
30V Li+ Linear Battery Charger
with GSM Test Mode in 3mm x 2mm TDFN
General Description
The MAX8922L linear battery charger safely charges a
single-cell lithium-ion (Li+) battery. Charging rate is
optimized to accommodate the thermal characteristics
of a given application. There is no need to reduce the
maximum charge current at the worst-case charger
power dissipation. Charging is optimized for a single
Li+ cell using a control algorithm that includes low-bat-
tery precharging, voltage and current-limited fast
charging, and top-off charging, while continuously
monitoring for input overvoltage and device die-temper-
ature conditions. The fast-charge current and top-off
current thresholds are programmable by a simple
single-pin serial interface. The charger status and valid
input power are indicated by two open-drain outputs
( CHG and POK ).
The fast-charge current is defaulted to 400mA and pro-
grammable through the single-pin interface ( EN /SET).
The MAX8922L also can be programmable to GSM test
mode through the single-pin interface.
The MAX8922L is available in a tiny (3mm x 2mm x
0.8mm) 10-pin TDFN package.
Applications
GSM/EDGE/UMTS/CDMA Cell Phones
Features
o Overvoltage-Protected 30V DC Rated Input (IN)
o Input Overvoltage-Protected Safe 4.94V LDO
Output
o 2.3A GSM RF Test Mode
o No External FET, Blocking Diode, or Sense
Resistor Required
o Single-Pin Easy Programmable Fast-Charge and
GSM Test Mode ( EN /SET)
o Resistor-Programmable Fast-Charge Current
(SETI)
o Resistor-Programmable Top-Off Current
Threshold (MIN)
o Prequalification Charge
o Power-OK Monitor Output ( POK )
o Charging-Status Output ( CHG )
o Die Temperature Regulation for Optimized
Charge Rate
o Tiny (3mm x 2mm x 0.8mm) 10-Pin TDFN Package
Ordering Information
Digital Cameras
PDAs
PART
MAX8922LETB+T
PIN-PACKAGE
10 TDFN-EP*
TOP MARK
AWN
Portable Media Players and MP3 Players
Wireless Appliances
Pin Configuration
+Denotes a lead(Pb)-free and RoHS-compliant package.
*EP = Exposed pad.
Note: This device operates in the -40°C to +85°C extended
operating temperature range.
Typical Operating Circuit
TOP VIEW
USB/AC ADAPTER
4.45V TO 30V
IN
BAT
10
9
8
7
6
R SETI
SETI
LDO
MAX8922L
*EP
R MIN
MIN
MAX8922L
SYSTEM SUPPLY
1
2
3
4
5
CHG
EN\SET
*EP = EXPOSED PAD.
TDFN
(3mm x 2mm x 0.8mm)
EP
GND TEST
POK
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
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