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SC908EVB

更新时间： 2024-02-26 23:36:03
品牌 Logo 应用领域
商升特 - SEMTECH 电池
页数 文件大小 规格书
30页 504K
描述
Power Management IC for Single-Cell Li-Ion Devices

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SC908EVB 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Obsolete零件包装代码：QFN
包装说明：4 X 4 MM, 0.90 MM HEIGHT, ROHS COMPLIANT, MLPQ-24针数：24
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.83
Is Samacsys：N可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：S-XQCC-N24
JESD-609代码：e3长度：4 mm
信道数量：1功能数量：1
端子数量：24最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：UNSPECIFIED
封装代码：HVQCCN封装等效代码：LCC24,.16SQ,20
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260电源：5 V
认证状态：Not Qualified座面最大高度：1 mm
子类别：Power Management Circuits最大供电电压 (Vsup)：5.25 V
最小供电电压 (Vsup)：4.75 V标称供电电压 (Vsup)：5 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：MATTE TIN端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：4 mm
Base Number Matches：1

SC908EVB 数据手册

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SC908  
Power Management IC for  
Single-Cell Li-Ion Devices  
POWER MANAGEMENT  
Features  
Description  
The SC908 is a complete power management system  
designed for use in Bluetooth wireless headsets, portable  
media players, and other battery-powered electronics  
where size is critical. Included are a full featured stand-  
alone Li-Ion battery charger with a programmable  
low-battery monitor, a low noise LDO regulator, and a DC-  
DC buck converter.  
„
Single Cell Li-Ion battery charger — CC/CV charging  
with current soft start  
„
Charger regulated output voltage — 4.2V 1ꢀ over  
temperature with Kelvin sense of battery voltage  
Charger input protection withstands 28V indefinitely  
Charger max constant current setting — 500mA  
Adjustable charge termination current down to  
10mA  
„
„
„
Battery charging features include programmable pre-  
charge, fast-charge, and termination current settings.  
Charge termination is controlled by a programmable  
timer and by a resistor that sets the termination current.  
The 28V max input voltage protects against hotplug over-  
shoot and faulty adapters without additional protection  
circuitry. The battery voltage Kelvin sense input elimi-  
nates errors due to high charging currents. A battery  
thermistor interface disables charging when the battery  
temperature exceeds safe-to-charge limits.  
„
Battery NTC interface disables charging if battery  
temperature out of range  
Programmable low battery detector threshold  
Four status indicators  
Programmable charge completion timer  
Buck converter with enable — output programmable  
from 1V to 3V, 150mA max output  
Buck converter efficiency — 88ꢀ at 50mA  
General purpose low noise LDO regulator with fast  
enable, active shutdown  
„
„
„
„
„
„
The step-down switching regulator (buck converter)  
improves system efficiency and extends battery life. The  
LDO regulator can be powered directly from the battery  
or from the buck converter output when efficiency is criti-  
cal. The fast-starting low noise LDO regulator is suitable  
for audio, RF, or general purpose regulation required by  
peripheral devices, such as a vibrating alert motor. The  
low battery detector warns when the battery level is  
below 3.3V, and when the battery has discharged below  
a lower programmable voltage limit.  
„
„
4x4x0.9 (mm) MLPQ package  
WEEE and RoHS compliant  
Applications  
„
„
„
Bluetooth headsets  
MP3 players  
Low cost mobile phones  
Typical Application Circuit  
Charging Adapter  
VAD  
VSYS  
BAT  
BSEN  
CVAD  
RRTIME  
RITERM  
RIPRGM  
Li-Ion  
BATTERY  
CVSYS  
RTIME  
CBAT  
RNPU  
ITERM  
Can supply LDO  
from battery or from  
DC-DC converter  
IPRGM  
Charging  
EN_NTC  
LEN  
CLVIN  
To Audio Circuits  
or vibrator motor  
LVIN  
RNTC (Battery  
Pack NTC  
Thermistor)  
SC908  
LVOUT  
Charger  
Present  
LFB  
SEN  
RL1  
LS  
CHRGB  
CPB  
FLTB  
LBATB  
RLBAT  
VREF  
AGND  
SLX  
CLVOUT  
SVOUT,  
To Bluetooth  
Processor  
CSFB  
RS1  
RL2  
CSVOUT  
SFB  
CVREF  
RRLBAT  
CSFG  
DGND  
PGND  
RS2  
US Patent: 6,836,095  
January 24, 2008  
1
© 2008 Semtech Corporation  
1234567...30

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