- 您现在的位置：买卖IC网 > PDF目录16040 > LTC4059EDC#TRPBF (Linear Technology)IC BATT CHARGER LI-ION REG 6DFN PDF资料下载
参数资料
| 型号： | LTC4059EDC#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER LI-ION REG 6DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 3.75 V ~ 8 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) |
LTC4059/LTC4059A
OPERATIO
The LTC4059/LTC4059A are linear battery chargers de-
signed primarily for charging single cell lithium-ion bat-
teries. Featuring an internal P-channel power MOSFET,
the chargers use a constant-current/constant-voltage
charge algorithm with programmable current. Charge
current can be programmed up to 900mA with a final float
voltage accuracy of ± 0.6%. No blocking diode or external
sense resistor is required; thus, the basic charger circuit
requires only two external components. The ACPR pin
(LTC4059A) monitors the status of the input voltage with
an open-drain output. The Li CC pin (LTC4059) disables
constant-voltage operation and turns the LTC4059 into a
precision current source capable of charging Nickel chem-
istry batteries. Furthermore, the LTC4059/LTC4059A are
designed to operate from a USB power source.
An internal thermal limit reduces the programmed charge
current if the die temperature attempts to rise above a
preset value of approximately 115 ° C. This feature protects
the LTC4059/LTC4059A from excessive temperature, and
allows the user to push the limits of the power handling
capability of a given circuit board without risk of damaging
the LTC4059/LTC4059A or external components. Another
APPLICATIO S I FOR ATIO
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
program resistor and the charge current are calculated
using the following equations:
benefit of the thermal limit is that charge current can be set
according to typical, not worst-case, ambient tempera-
tures for a given application with the assurance that the
charger will automatically reduce the current in worst-
case conditions.
The charge cycle begins when the voltage at the V CC pin
rises approximately 150mV above the BAT pin voltage, a
program resistor is connected from the PROG pin to
ground, and the EN pin is pulled below the shutdown
threshold (typically 0.92V).
If the BAT pin voltage is below 4.2V, or the Li CC pin is
pulled above V Li CC (LTC4059 only), the LTC4059 will
charge the battery with the programmed current. This is
constant-current mode. When the BAT pin approaches the
final float voltage (4.2V), the LTC4059 enters constant-
voltage mode and the charge current begins to decrease.
To terminate the charge cycle the EN should be pulled
above the shutdown threshold. Alternatively, reducing the
input voltage below the BAT pin voltage will also terminate
the charge cycle.
Undervoltage Lockout (UVLO)
An internal undervoltage lockout circuit monitors the input
voltage and keeps the charger in undervoltage lockout until
V CC rises approximately 150mV above the BAT pin voltage.
The UVLO circuit has a built-in hysteresis of 115mV. If the
BAT pin voltage is below approximately 2.75V, then the
R PROG = 1000 ?
1 . 21 V
I CHG
, I CHG = 1000 ?
1 . 21 V
R PROG
charger will remain in undervoltage lockout until V CC rises
above approximately 3V. During undervoltage lockout
conditions, maximum battery drain current is 4 μ A.
For best stability over temperature and time, 1% metal-
film resistors are recommended.
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:
Power Supply Status Indicator
(ACPR, LTC4059A Only)
The power supply status output has two states: pull-down
and high impedance. The pull-down state indicates that
V CC is above the undervoltage lockout threshold (see
I BAT =
V PROG
R PROG
? 1000
Undervoltage Lockout). When this condition is not met,
the ACPR pin is high impedance indicating that the
LTC4059A is unable to charge the battery.
4059fb
7
相关PDF资料 |
PDF描述 |
|---|---|
| EMM10DRYN | CONN EDGECARD 20POS DIP .156 SLD |
| LTC4059EDC#TR | IC BATT CHARGER LI-ION REG 6DFN |
| IMC1210ER220K | INDUCTOR WW 22UH 10% 1210 |
| EMM10DRYH | CONN EDGECARD 20POS DIP .156 SLD |
| IMC1210ER180K | INDUCTOR WW 18UH 10% 1210 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4060 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone Linear NiMH/NiCd Fast Battery Charger |
| LTC4060EDHC | 制造商:Linear Technology 功能描述:Battery Charger NiCD/NiMH 2000mA -0.3V to 10.3V 16-Pin DFN EP |
| LTC4060EDHC#PBF | 功能描述:IC BATT CHARGER NIMH/NICD 16DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4060EDHC#TR | 制造商:Linear Technology 功能描述:Battery Charger NiCD/NiMH 2000mA -0.3V to 10.3V 16-Pin DFN EP T/R |
| LTC4060EDHC#TRPBF | 功能描述:IC BATT CHARGER NIMH/NICD 16DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。