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參數(shù)資料
| 型號： | LTC4067EDE#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO12 |
| 封裝： | 4 X 3 MM, PLASTIC, MO-229WGED, DFN-12 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 223K |
| 代理商： | LTC4067EDE#TR |
LTC4067
14
4067f
OPERATIO
U
if the battery is below the recharge threshold. There is
approximately 3°C of temperature hysteresis associated
with each of the input comparators. If the NTC pin is tied
to GND, thermistor qualied charging is disabled.
Fault Conditions
The CHRG pin provides information as to the charging
status, indicating an active charge cycle with a strong
open-drain pull down at the CHRG pin. NTC faults and
bad battery faults are indicated with serrated pulses; this
is described in more detail under the heading Fault Condi-
tions in the Applications Information section.
When the battery is being charged, the CHRG pin is pulled
low by an internal N-channel MOSFET. When the charge
cycle enters voltage mode charging and the charge current
is reduced below ICC-CHG/10, the CHRG indicates that the
charge cycle is nearly complete by switching to a Hi-Z
state. Also when the battery voltage exceeds the OUT
voltage and the input supply is removed, or the LTC4067
is put into suspend or shutdown modes, the CHRG pin
is forced into a high impedance state. If a bad battery
is detected, or if an NTC temperature fault is detected,
charging is halted and the CHRG pin switches to a series
of serrated open-drain pull down pulses. These serrated
current pulses are designed to cause an LED connected
from the CHRG pin to a positive supply voltage to visibly
ash, indicating to the user that there is a problem, as well
as allowing a microcontroller to detect a fault condition
within 300μs.
Overvoltage Protection
The OVI input is provided to sense potentially hazardous
voltages at the input in case an unregulated wall adapter
is applied. If an overvoltage condition is detected the OVP
pin is driven high to turn off an external PMOS transistor
inserted in series with the IN pin to disconnect the high
voltage from the LTC4067.
Table 2 lists recommended P-channel MOSFETs to use
with the LTC4067.
Table 2. Recommended OVP Transistors
PART NUMBER
DESCRIPTION
IRLML6402
P-channel 16V
FDR8508P
Dual P-channel 16V
If the OVP pin is high, the power path from IN to OUT is
disabled.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4068-4.2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Standalone Linear Li-Ion Battery Charger with Programmable Termination |
| LTC4068EDD-4.2 | 功能描述:IC BATT CHARGER W/PROG TERM 8DFN 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: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 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC4068EDD-4.2#PBF | 功能描述:IC CHARGER BATT LI-ON 8-DFN RoHS:是 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: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 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC4068EDD-4.2#TR | 功能描述:IC BATT CHARGER W/PROG TERM 8DFN 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: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 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC4068EDD-4.2#TRPBF | 功能描述:IC BATT CHARGER W/PROG TERM 8DFN RoHS:是 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: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 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
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