- 您现在的位置：买卖IC网 > PDF目录1833 > LTC4060EDHC#TRPBF (Linear Technology)IC BATT CHARGER NIMH/NICD 16DFN PDF资料下载
参数资料
| 型号： | LTC4060EDHC#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER NIMH/NICD 16DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 镍镉（NiCd）、镍金属氢化物（NiMH） |
| 电源电压： | 4.5 V ~ 10 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFDFN 裸露焊盘 |
| 供应商设备封装： | 16-DFN（5x3） |
| 包装： | 带卷 (TR) |
LTC4060
OPERATIO
The charge current is set with an external current pro-
gramming resistor connected between the PROG pin and
GND. In the Block Diagram, amplifier A1 will cause a virtual
1.5V to appear on the PROG pin and thus, all of the pro-
gramming resistor’s current will flow through the N-channel
FET to the current divider. The current divider is controlled
by the charger state control logic to produce a voltage
across R1, appropriate either for precharge (I/5) or for fast
charge (I), depending on the cell voltage. The current di-
vider also produces a constant current I OSC , that along
with an external capacitor tied to the TIMER pin, sets the
Oscillator’s clock frequency. During charging, the external
PNP transistor’s collector will provide the battery charge
current. The PNP’s emitter current flows into the SENSE
pin and through the internal current sense resistor R2
(0.03 ? ). This current is slightly more than the collector
current since it includes the base current. Amplifier A2 and
the output driver will drive the base of the external PNP
through the DRIVE pin to force the same reference voltage
that appears across R1 to appear across the R2. The pre-
cision ratio between R1 and R2, along with the current
programming resistor, accurately determines the charge
current.
When charging begins, the charger state control logic will
enable precharge of the battery. When the cell voltage
exceeds the fast charge qualification threshold, fast charge
begins. If the cell voltage exceeds the initial delay hold off
threshold voltage just prior to precharge, then the A/D
converter immediately monitors for a – ? V event to
terminate charging while in fast charge. Otherwise, the
fast charge voltage stabilization hold off period must
expire before the A/D converter monitors for a – ? V event
from which to terminate charging. The – ? V magnitude for
termination is selected for either NiMH or NiCd by the
CHEM pin. Should the battery temperature become too hot
or too cold, charging will be suspended by the charger
state control logic until the temperature enters normal
limits. A termination timer puts the charger into shutdown
mode if the programmed time has expired. After charging
has ended, the optional autorecharge detector function
monitors for the battery voltage to drop to either a default
or externally programmed cell voltage before automati-
cally restarting a charge cycle.
The SHDN pin can be used to return the charger to a
shutdown and reset state. The PAUSE pin can be used to
pause the charge current and internal clocks for any
interval desired.
Fault conditions, such as overheating of the IC due to
excessive PNP base current drive, are monitored and
limited by the IC overtemperature detection and output
driver and current limit blocks.
When either V CC is removed or manual shutdown is
entered, the charger will draw only tiny leakage currents
from the battery, thus maximizing standby time. With V CC
removed, the external PNP’s base is connected to the
battery by the charger. In manual shutdown, the base is
connected to V CC by the charger.
Undervoltage Lockout
An internal undervoltage lockout circuit (UVLO) monitors
the input voltage and keeps the charger in the inactive
sleep mode until V CC rises above the undervoltage exit
threshold. The ACP pin is high impedance while in the
sleep mode and becomes low impedance to ground when
in the active mode. The threshold is dependent upon the
number of series cells selected by the SEL0 and SEL1 pins
(see V UVI1-3 and V UVD1-3 in the Electrical Characteristics
table). The UVLO circuit has a built-in hysteresis of 100mV.
The thresholds are chosen to provide a minimum voltage
drop of approximately 600mV between minimum V CC and
BAT at a battery cell voltage of 1.8V. This helps to protect
against excessive saturation in the external power PNP
when the supply voltage is near its minimum. While
inactive the LTC4060 reduces battery current to just a
negligible leakage current (I BSL ).
Manual Shutdown Control
The LTC4060 can be forced into a low quiescent current
shutdown while V CC is present by applying a low level to
the SHDN pin. In manual shutdown, charging is inhibited,
the internal timer is reset and oscillator disabled, CHRG
status output is high impedance and ACP continues to
provide the correct status. The LTC4060 will draw low cur-
rent from the supply (I SD ), and only a negligible leakage
current is applied to the battery (I BSD ). If a high level is
4060f
9
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4061EDD#TRPBF | IC BATT CHARGER LI-ION 10-DFN |
| LTC4062EDD#TRPBF | IC BATT CHARGER LI-ION 10-DFN |
| LTC4063EDD#TRPBF | IC BATT CHRGR LI-ION LDO 10DFN |
| LTC4064EMSE#TRPBF | IC CHARGER BATT L-ION 4V 10-MSOP |
| LTC4065EDC#TRPBF | IC CHARGER BATT LI-ON 6-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4060EFE | 制造商:Linear Technology 功能描述:Battery Charger NiCD/NiMH 2000mA -0.3V to 10.3V 16-Pin TSSOP EP |
| LTC4060EFE#PBF | 功能描述:IC BATT CHARGR NIMH/NICD 16TSSOP 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 |
| LTC4060EFE#TRPBF | 功能描述:IC BATT CHARGR NIMH/NICD 16TSSOP 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) |
| LTC4060EFEPBF | 制造商:Linear Technology 功能描述:LTC4060 NiCd/NiMH 2A standalone charger |
| LTC4061 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone Linear Li-lon Battery Charger with Thermistor Input |
发布紧急采购，3分钟左右您将得到回复。