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参数资料
| 型号： | LTC4065AEDC#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATT LI-ON 6-DFN |
| 标准包装： | 500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 3.75 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WFDFN 裸露焊盘 |
| 供应商设备封装： | 6-DFN-EP（2x2） |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC4065AEDC-ND |
LTC4065/LTC4065A
OPERATIO
typical, not worst-case, ambient temperatures for a given
application with the assurance that the charger will auto-
matically reduce the current in worst-case conditions.
program resistor and the charge current are calculated
using the following equations:
The charge cycle begins when the following conditions are
met: the voltage at the V CC pin exceeds 3.6V and approxi-
R PROG = 1000 ?
1 V
I CHG
, I CHG =
1000 V
R PROG
mately 80mV above the BAT pin voltage, a program
resistor is present from the PROG pin to ground and the EN
pin (LTC4065 only) is pulled below the shutdown thresh-
old (typically 0.82V).
The charge current out of the BAT pin can be determined
at any time by monitoring the PROG pin voltage and using
the following equation:
If the BAT pin voltage is below 2.9V, the charger goes into
trickle charge mode, charging the battery at one-tenth the
I BAT =
V PROG
R PROG
? 1000
programmed charge current to bring the cell voltage up to
a safe level for charging. If the BAT pin voltage is above
4.1V, the charger will not charge the battery as the cell is
near full capacity. Otherwise, the charger goes into the fast
charge constant-current mode.
When the BAT pin approaches the final float voltage
(4.2V), the LTC4065 enters constant-voltage mode and
the charge current begins to decrease. When the current
drops to 10% of the full-scale charge current, an internal
comparator turns off the N-channel MOSFET on the CHRG
pin and the pin assumes a high impedance state.
An internal timer sets the total charge time, t TIMER (typi-
cally 4.5 hours). When this time elapses, the charge cycle
terminates and the CHRG pin assumes a high impedance
state. To restart the charge cycle, remove the input voltage
and reapply it, momentarily force the EN pin above V MS
(typically 0.82V) for LTC4065, or momentarily float the
PROG pin and reconnect it (LTC4065A). The charge cycle
will automatically restart if the BAT pin voltage falls below
V RECHRG (typically 4.1V).
When the input voltage is not present, the battery drain
current is reduced to less than 4 μ A. The LTC4065 can also
be shut down by pulling the EN pin above the shutdown
threshold voltage. To put LTC4065A in shutdown mode,
float the PROG pin. This reduces input quiescent current
to less than 20 μ A and battery drain current to less than 1 μ A.
Programming Charge Current
The charge current is programmed using a single resistor
from the PROG pin to ground. The battery charge current
is 1000 times the current out of the PROG pin. The
Undervoltage Lockout (UVLO)
An internal undervoltage lockout circuit monitors the input
voltage and keeps the charger in undervoltage lockout
until V CC rises above 3.6V and approximately 80mV above
the BAT pin voltage. The 3.6V UVLO circuit has a built-in
hysteresis of approximately 0.6V and the automatic shut-
down threshold has a built-in hysteresis of approximately
50mV. During undervoltage lockout conditions, maxi-
mum battery drain current is 4 μ A and maximum supply
current is 11 μ A.
Shutdown Mode
The LTC4065 can be disabled by pulling the EN pin above
the shutdown threshold (approximately 0.82V). The
LTC4065A can be disabled by floating the PROG pin. In
shutdown mode, the battery drain current is reduced to
less than 1 μ A and the supply current to about 20 μ A.
Timer and Recharge
The LTC4065 has an internal termination timer that starts
when an input voltage greater than the undervoltage
lockout threshold is applied to V CC , or when leaving
shutdown the battery voltage is less than the recharge
threshold.
At power-up or when exiting shutdown, if the battery
voltage is less than the recharge threshold, the charge
time is set to 4.5 hours. If the battery voltage is greater than
the recharge threshold at power-up or when exiting shut-
down, the timer will not start and charging is prevented
since the battery is at or near full capacity.
4065fb
10
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相关代理商/技术参数 |
参数描述 |
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| LTC4065EDC | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone 750mA Li-Ion Battery Charger in 2 】 2 DFN |
| LTC4065EDC#PBF | 制造商:Linear Technology 功能描述:BATTERY CHARGER LI-ION 750mA 制造商:Linear Technology 功能描述:BATTERY CHARGER, LI-ION, 750mA, DFN-6; Battery Type:Li-Ion; Input Voltage:5.5V; Battery Charge Voltage:4.2V; Charge Current Max:750mA; Battery IC Case Style:DFN; No. of Pins:6; No. of Series Cells:1; Operating Temperature Min:-40C ;RoHS Compliant: Yes |
| LTC4065EDC#TR | 功能描述:IC CHARGER BATT LI-ON 6-DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4065EDC#TRM | 功能描述:IC CHARGER BATT LI-ON 6-DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4065EDC#TRMPBF | 功能描述:IC CHARGER BATT LI-ON 6-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
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