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參數(shù)資料
| 型號： | LP3918TL-L |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Battery Charge Management and Regulator Unit |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25 |
| 封裝： | 2.50 X 2.50 MM, MICRO, SMD-25 |
| 文件頁數(shù)： | 25/30頁 |
| 文件大?。?/td> | 1292K |
| 代理商： | LP3918TL-L |
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Applications Schematic Diagram
20211605
Device Description
The LP3918 Charge Management and Regulator Unit is de-
signed to supply charger and voltage output capabilities for
mobile systems, e.g. CDMA handsets. The device provides a
Li-Ion charging function and 7 regulated outputs. Communi-
cation with the device is via an I2C compatible serial interface
that allows function control and status read-back.
The battery charge management section provides a pro-
grammable CC/CV linear charge capability. Following a nor-
mal charge cycle a maintenance mode keeps battery voltage
between programmable levels. Power levels are thermally
regulated to obtain optimum charge levels over the ambient
temperature range.
Charger Features
Pre-charge, CC, CV and Maintenance modes
USB Charge 100mA/450mA
Integrated FET
Integrated Reverse Current Blocking Diode
Integrated Sense Resistor
Thermal regulation
Charge Current Monitor Output
Programmable charge current 50mA - 950mA with 50mA
steps
Default CC mode current 100mA
Pre-charge current fixed 50mA
Termination voltage 4.1V, 4.2V (default), 4.3V, and 4.4V,
accuracy better than +/- 0.5% (typ)
Restart level 50mV, 100mV, 150mV (default) and 200mV
below Termination voltage
End of Charge 0.1C (default), 0.15C, 0.2C and 0.25C
Programmable Enable Control
Safety timer
Input voltage operating range 4.5V - 6.0V
LDO mode on LP3918TL-L option.
REGULATORS
7 Low dropout linear regulators provide programmable volt-
age outputs with current capabilities of 80mA, 150mA and
300mA as given in the table below. LDO1, LDO2 and LDO3
are powered up by default with LDO1 reaching regulation be-
fore LDO2 and LDO3 are started. LDO1, LDO3 and LDO7 can
be disabled/enabled via the serial interface. During power up
LDO1 and LDO2 must reach their regulation voltage detection
point for the device to power up and remain powered. LDO4,
LDO5 and LDO6 have external enable pins and may power
up following LDO2 as determined by their respective enable.
Under voltage lockout oversees device start up with preset
level of 2.85V(typ).
www.national.com
4
LP3918
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LP3918TLX | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LP3918TLX/NOPB | 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| LP3918TLX-A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Battery Charge Management and Regulator Unit |
| LP3918TLX-A/NOPB | 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| LP3918TLX-L | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Battery Charge Management and Regulator Unit |
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