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參數(shù)資料
| 型號： | LTC4054LES5-4.2#TRMPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT; Package: SOT; No of Pins: 5; Temperature Range: -40°C to +125°C |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | PLASTIC, MO-193, LEAD FREE, TSOT-23, 5 PIN |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 192K |
| 代理商： | LTC4054LES5-4.2#TRMPBF |
6
LTC4054L-4.2
4054l42f
UU
U
PI FU CTIO S
CHRG (Pin 1): Open-Drain Charge Status Output. When
the battery is charging, the CHRG pin is pulled low by an
internal N-channel MOSFET. When the charge cycle is
completed, a weak pull-down of approximately 20
A is
connected to the CHRG pin, indicating an “AC present”
condition. When the LTC4054L detects an undervoltage
lockout condition, CHRG is forced high impedance.
GND (Pin 2): Ground.
BAT (Pin 3): Charge Current Output. Provides charge
current to the battery and regulates the final float voltage
to 4.2V. An internal precision resistor divider from this pin
sets this float voltage and is disconnected in shutdown
mode.
VCC (Pin 4): Positive Input Supply Voltage. Provides
power to the charger. VCC can range from 4.25V to 6.5V
and should be bypassed with at least a 1
F capacitor.
When VCC drops to within 30mV of the BAT pin voltage, the
LTC4054L enters shutdown mode, dropping IBAT to less
than 2
A.
PROG (Pin 5): Charge Current Program, Charge Current
Monitor and Shutdown Pin. The charge current is pro-
grammed by connecting a 1% resistor, RPROG, to ground.
When charging in constant-current mode, this pin servos
to 1V. In all modes, the voltage on this pin can be used to
measure the charge current using the following formula:
IBAT = (VPROG/RPROG) 150
The PROG pin is also used to shut down the charger.
Disconnecting the program resistor from ground allows
a 3
A current to pull the PROG pin high. When it reaches
the 1.21V shutdown threshold voltage, the charger enters
shutdown mode, charging stops and the input supply
current drops to 25
A. This pin is also clamped to
approximately 2.4V. Driving this pin to voltages beyond
the clamp voltage will draw currents as high as 1.5mA.
Reconnecting RPROG to ground will return the charger to
normal operation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4054X | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT |
| LTC4054X-4.2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT |
| LTC4054XES5-4.2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT |
| LTC4054XES5-4.2#PBF | 制造商:Linear Technology 功能描述:Constant Current/Voltage Charger Li-Ion 500mA 4.2V 5-Pin TSOT-23 |
| LTC4054XES5-4.2#TR | 功能描述:IC CHARGR BATTERY L-ION TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
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