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參數(shù)資料
| 型號： | LTC4080EMSE |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.8 A BATTERY CHARGE CONTROLLER, 2750 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 20/20頁 |
| 文件大小： | 288K |
| 代理商： | LTC4080EMSE |
LTC4080
9
4080fa
PI FU CTIO S
UU
U
BAT (Pin 1): Charge Current Output and Buck Regulator
Input. Provides charge current to the battery and regulates
the nal oat voltage to 4.2V. An internal precision resistor
divider from this pin sets the oat voltage and is disconnected
in charger shutdown mode. This pin should be decoupled
with a low ESR capacitor for low-noise buck operation.
VCC(Pin2):PositiveInputSupplyVoltage.Thispinprovides
power to the battery charger. VCC can range from 3.75V
to 5.5V. This pin should be bypassed with at least a 1F
capacitor. When VCC is less than 32mV above the BAT pin
voltage, the battery charger enters shutdown mode.
EN_CHRG(Pin3):EnableInputPinfortheBatteryCharger.
Pulling this pin above the manual shutdown threshold
(VIH) puts the LTC4080 charger in shutdown mode, thus
stopping the charge cycle. In battery charger shutdown
mode, the LTC4080 has less than 10A supply current and
less than 5A battery drain current if the regulator is not
running. Enable is the default state, but the pin should be
tied to GND if unused.
PROG (Pin 4): Charge Current Program and Charge
Current Monitor Pin. Connecting a 1% resistor, RPROG, to
ground programs the charge current. 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:
I
V
R
BAT
PROG
=
40 0
ACPR (Pin 5): Open-Drain Power Supply Status Output.
When VCC is greater than the undervoltage lockout
threshold (3.6V) and greater than VBAT + 80mV, the ACPR
pin will be pulled to ground; otherwise the pin is high
impedance.
CHRG (Pin 6): Open-Drain Charge Status Output. The
charge status indicator pin has three states: pulldown,
high impedance state, and pulse at 2Hz. This output can
be used as a logic interface or as an LED driver. When the
battery is being charged, the
CHRG pin is pulled low by an
internal N-channel MOSFET. When the charge current drops
to 10% of the full-scale current, the
CHRG pin is forced to
a high impedance state. When the battery voltage remains
below 2.9V for one quarter of the full charge time, the
battery is considered defective, and the
CHRG pin pulses
at a frequency of 2Hz with 75% duty cycle.
FB (Pin 7): Feedback Pin for the Buck Regulator. A resistor
divider from the regulator’s output to the FB pin programs
the output voltage. Servo value for this pin is 0.8V.
MODE (Pin 8): Burst Mode Enable Pin. Tie this pin high
to force the LTC4080 regulator into Burst Mode operation
for all load conditions. Tie this pin low to force constant-
frequency mode operation for all load conditions. Do not
oat this pin.
EN_BUCK (Pin 9): Enable Input Pin for the Switching
Regulator. Pull this pin high to enable the regulator, pull
low to shut down. Do not oat this pin.
SW (Pin 10): Switch Pin for the Buck Regulator. Minimize
the length of the metal trace connected to this pin. Place
the inductor as close to this pin as possible.
GND (Pin 11): Ground. This pin is the back of the Exposed
Pad package and must be soldered to the PCB for electrical
connection and rated thermal performance.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4080EMSE#PBF | 功能描述:IC CHARGER LI-ION 10-MSOP 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 |
| LTC4080EMSE#TRPBF | 功能描述:IC CHARGER LI-ION 10-MSOP 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 |
| LTC4080EMSE-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck |
| LTC4080EMSE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck |
| LTC4080X | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck in 3mm × 3mm DFN |
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