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SGM4054

更新时间： 2024-11-18 00:04:31
品牌 Logo 应用领域
特瑞仕 - TOREX 电池
页数 文件大小 规格书
14页 605K
描述
Standalone Linear Li-lon Battery Charger with Thermal Regulation

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SGM4054 数据手册

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Preliminary Data Sheet  
Standalone Linear Li-Ion Battery  
Charger with Thermal Regulation  
SGM4054  
GENERAL DESCRIPTION  
FEATURES  
The SGM4054 is a complete constant-current/constant-  
voltage linear charger for single cell lithium-ion batteries.  
Its SOT23-5 small package and low external component  
count make the SGM4054 ideally suited for portable  
applications. Besides wall adapter’s 5V power supply,  
the SGM4054 is specifically designed to work within USB  
power specifications.  
− Programmable Charge Current Up to 800mA  
− No external MOSFET, Sense Resistor or Blocking  
Diode Required  
− Complete Linear Charger in SOT23-5 Package for  
Single Cell Lithium-Ion Batteries  
− Constant-Current/Constant-Voltage Operation  
with Thermal Regulation to Maximize Charge  
Rate Without Risk of Overheating  
− Charges Single Cell Li-Ion Batteries Directly  
from USB Port  
− Preset 4.2V Charge Voltage with ±1% Accuracy  
− Charge Current Monitor Output for Gas Gauging  
− Automatically Recharge  
− Charge Status indication Pin  
− C/10 Charge Termination  
− 25μA Supply Current in Shutdown mode  
− 2.93V Trickle Charge Threshold  
SGM4054 is high integrated charger, there is no external  
current sense resistor and MOSFET, and no Blocking  
diode is required due to the internal MOSFET  
architecture. Thermal feedback regulates the charge  
current to limit the die temperature during high power  
operation or high ambient temperature. The charge  
voltage is fixed at 4.2V, and the charge current can be  
programmed externally with a single resistor. The  
SGM4054 automatically terminates the charge cycle  
when the charge current drops to 1/10th the  
programmed value after the final float voltage is  
reached.  
When the input supply (wall adapter or USB supply) is  
removed, the SGM4054 automatically enters a low  
current state, dropping the battery drain current to less  
than 3μA. The SGM4054 can be put into shutdown mode,  
reducing the supply current to 25μA.  
− Soft-Start Limits Inrush Current  
− Lead (Pb) Free SOT23-5 Package  
APPLICATIONS  
Mobile Phones, PDA’s, MP3 Players  
Charging Docks and Cradles  
Bluetooth Applications  
Other features include charge current monitor,  
undervoltage lockout, automatic recharge and a status  
pin to indicate charge termination and the presence of an  
input voltage.  
The SGM4054 has lead (Pb) free SOT23-5 package and is  
rated over the -40°C to +85°C temperature range.  
Other Handheld Devices  
PIN CONFIGURATIONS（TOP VIEW）  
TYPICAL APPLICATION  
600mA Single Cell Li-lon Charger  
SGM4054  
VIN = 4.5V to 6.5V  
CHRG  
GND  
BAT  
PROG  
1
2
5
CIN  
1.0μF to 10μF  
4
600mA  
3
4
V+  
V+  
3
0.33kO  
BAT  
SOT23-5  
SGM4054  
4.2V  
1
5
COUT  
Li-lon  
CHRG  
PROG  
BATTERY  
1.0μF to 10μF  
GND  
1.65kO  
2
SG Microelectronics Co, Ltd  
Tel: 86/10/51798160/80  
www.sg-micro.com  
Jul. 2007  
1234567...14

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