參數(shù)資料
型號: LTC1731-8.2
廠商: 光寶科技股份有限公司
英文描述: LITHIUM - LON LINEAR BATTERY CHARGER CONTROLLER
中文描述: 鋰-倫敦股票交易所線性電池充電控制器
文件頁數(shù): 5/12頁
文件大小: 175K
代理商: LTC1731-8.2
5
LTC1731-8.2/LTC1731-8.4
sn1731 17318fs
PI
FU
CTIO
N
S
U
U
BAT (Pin 1):
Battery Sense Input. A bypass capacitor of at
least 10
μ
F is required to keep the loop stable when the
battery is not connected. A precision internal resistive
divider sets the final float potential on this pin. The resistor
divider is disconnected in sleep mode.
CHRG (Pin 2):
Open-Drain Charge Status Output. 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 for at least 0.32
seconds, the N-channel MOSFET turns off and a 100
μ
A
current source is connected from the CHRG pin to GND.
When the timer runs out or the input supply is removed,
the current source will be disconnected and the CHRG pin
is forced into a high impedance state.
TIMER (Pin 3):
Timer Capacitor and Constant-Voltage
Mode Disable Input Pin. A capacitor C
TIMER
connected
from this pin to ground sets a 30 hour/
μ
F time period for
charge termination. When the TIMER pin is connected to
V
CC
, the constant-voltage mode and the timer is disabled
and the IC will operate in constant-current mode only.
Short the TIMER pin to GND to disable the internal timer
and the
C
/10 functions.
GND (Pin 4):
Ground.
PROG (Pin 5):
Charge Current Program and Shutdown
Input Pin. The charge current is programmed by connect-
ing a resistor, R
PROG
to ground. The charge current is I
BAT
= (V
PROG
800
)/(R
PROG
R
SENSE
). The IC can be forced
into shutdown by floating the PROG pin and allowing the
internal 2.5
μ
A current source to pull the pin above the
2.457V shutdown threshold voltage.
DRV (Pin 6):
Drive Output Pin for the P-Channel MOSFET
or PNP Transistor. If a PNP transistor is used, it must have
high gain (see Applications Information section). The DRV
pin is internally clamped to 6.5V below V
CC
.
V
CC
(Pin 7):
Input Supply Voltage. V
CC
ranges from 8.8V
to 12V when charging. If V
CC
drops below V
BAT
+ 54mV,
for example when the input supply is disconnected, then
the IC enters sleep mode with I
CC
< 30
μ
A. Bypass this pin
with a 1
μ
F capacitor.
SENSE (Pin 8):
Current Sense Input. Connect this pin to
the sense resistor. Choose the resistor value using the
following equation:
R
SENSE
= (V
PROG
800
)/(R
PROG
I
BAT
)
相關PDF資料
PDF描述
LTD-2701P The LTD-2701P is a 0.28 inch (7mm) digit height dual digit seven-segment display
LTD-432PC 0.40 inch (10.21 mm) digit height dual digit seven-segment display
LTD-6000 0.56 DUAL DIGIT NUMERIC DISPLAYS
LTD104C11S 26CM COLOUR TFT LCD MODULE
LTDL-RX16P04 High speed transmission (16 Mbps , NRZ code)
相關代理商/技術參數(shù)
參數(shù)描述
LTC1731EMS8-4.1 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP 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
LTC1731EMS8-4.1#PBF 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP 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
LTC1731EMS8-4.1#TR 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP 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
LTC1731EMS8-4.1#TRPBF 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP 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
LTC1731EMS8-4.2 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP 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