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参数资料
| 型号： | LTC4069EDC#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/18页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER LI-ION 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) |
LTC4069
PIN FUNCTIONS
I BAT =
V PROG
GND (Pin 1): Ground.
CHRG (Pin 2): Open-Drain Charge Status Output. The
charge status indicator pin has three states: pull-down,
pulse at 2Hz and high impedance state. 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 cur-
rent drops to 10% of full-scale current, the CHRG pin is
forced to a high impedance state. If the battery voltage
remains below 2.9V for one quarter of the charge time, the
battery is considered defective and the CHRG pin pulses
at a frequency of 2Hz (75% duty cycle). When the NTC
pin voltage rises above 0.76 ? V CC or drops below 0.35
? V CC , the CHRG pin pulses at a frequency of 2Hz (25%
duty cycle).
BAT (Pin 3): Charge Current Output. Provides charge cur-
rent to the battery and regulates the final float voltage to
4.2V. An internal precision resistor divider on this pin sets
the float voltage and is disconnected in shutdown mode.
VCC (Pin 4): Positive Input Supply Voltage. This pin
provides power to the charger. V CC can range from 3.75V
to 5.5V. This pin should be bypassed with at least a 1μF
capacitor. When V CC is within 32mV of the BAT pin volt-
age, the LTC4069 enters shutdown mode, dropping I BAT
to about 1μA.
NTC (Pin 5): Input to the NTC (Negative Temperature
Coefficient) Thermistor Temperature Monitoring Circuit.
Under normal operation, connect a thermistor from the
NTC pin to ground and a resistor of equal value from the
NTC pin to V CC . When the voltage at this pin drops below
0.35 ? V CC at hot temperatures or rises above 0.76 ? V CC
at cold, charging is suspended, the internal timer is frozen
and the CHRG pin output will start to pulse at 2Hz. Pulling
this pin below 0.016 ? V CC disables the NTC feature. There
is approximately 3°C of temperature hysteresis associated
with each of the input comparator’s thresholds.
PROG (Pin 6): Charge Current Program and Charge
Current Monitor Pin. Connecting a 1% resistor, R PROG ,
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:
? 1000
R PROG
Floating the PROG pin puts the charger in shutdown mode.
In shutdown mode, the LTC4069 has less than 20μA supply
current and about 1μA battery drain current.
Exposed Pad (Pin 7): Ground. The Exposed Pad must
be soldered to the PCB ground to provide both electrical
contact and rated thermal performance.
6
For more information www.linear.com/LTC4069
4069fc
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4069EDC-TRPBF | 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 with NTC Thermistor Input |
| LTC4070 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:Ultralow Voltage Step-Up Converter and Power Manager |
| LTC4070EDDB | 制造商:LINER 制造商全称:Linear Technology 功能描述:Li-Ion/Polymer Shunt Battery Charger System |
| LTC4070EDDB#PBF | 制造商:Linear Technology 功能描述:Battery Charger Li-Ion/Li-Pol 50mA 4.2V 10-Pin DFN EP Bulk 制造商:Linear Technology 功能描述:IC BATTERY CHARGER 50mA DFN-8 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 50mA, DFN-8 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 50mA, DFN-8; Battery Type:Li-Ion, Li-Polymer; Battery Charge Voltage:4.2V; Charge Current Max:50mA; Battery IC Case Style:DFN; No. of Pins:8; No. of Series Cells:1; Operating Temperature Min:-40C ;RoHS Compliant: Yes |
| LTC4070EDDB#TRMPBF | 功能描述:IC LI-ION/POLY BATT CHARGER 8DFN 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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