参数资料
型号: LTC1734ES6-4.1#TR
厂商: Linear Technology
文件页数: 1/12页
文件大小: 0K
描述: IC BATT CHRGR LI-ION LIN SOT23-6
标准包装: 2,500
功能: 充电管理
电池化学: 锂离子,镍镉,镍氢
电源电压: 4.55 V ~ 8 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SOT-23-6 细型,TSOT-23-6
供应商设备封装: TSOT-23-6
包装: 带卷 (TR)
其它名称: LTC1734ES6-4.1TR
LTC1734
Lithium-Ion Linear
Battery Charger in ThinSOT
FEATURES
DESCRIPTIO
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Low Profile (1mm) ThinSOT TM Package
No Blocking Diode Required
No Sense Resistor Required
1% Accurate Preset Voltages: 4.1V or 4.2V
Charge Current Monitor Output
for Charge Termination
Programmable Charge Current: 200mA to 700mA
Automatic Sleep Mode with Input Supply Removal
Manual Shutdown
Negligible Battery Drain Current in Shutdown
Undervoltage Lockout
Self Protection for Overcurrent/Overtemperature
The LTC ? 1734 is a low cost, single cell, constant-current/
constant-voltage Li-Ion battery charger controller. When
combined with a few external components, the SOT-23
package forms a very small, low cost charger for single cell
lithium-ion batteries.
The LTC1734 is available in 4.1V and 4.2V versions with
1% accuracy. Constant current is programmed using a
single external resistor between the PROG pin and ground.
Manual shutdown is accomplished by floating the pro-
gram resistor while removing input power automatically
puts the LTC1734 into a sleep mode. Both the shutdown
and sleep modes drain near zero current from the battery.
APPLICATIO S
Charge current can be monitored via the voltage on the
PROG pin allowing a microcontroller or ADC to read the
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Cellular Telephones
Handheld Computers
Digital Cameras
Charging Docks and Cradles
Low Cost and Small Size Chargers
Programmable Current Sources
current and determine when to terminate the charge cycle.
The output driver is both current limited and thermally
protected to prevent the LTC1734 from operating outside
of safe limits. No external blocking diode is required.
The LTC1734 can also function as a general purpose
current source or as a current source for charging nickel-
cadmium (NiCd) and nickel-metal-hydride (NiMH) batter-
ies using external termination.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
PROG Pin Indicates Charge Status
5V
300mA Li-Ion Battery Charger
4V
V BAT
V IN
5V
1 μ F
3
2
V CC I SENSE
LTC1734
GND DRIVE
1
6
FMMT549
3V
CONSTANT
CONSTANT
+
4
R PROG
5k
PROG
BAT
5
I BAT = 300mA
SINGLE
10 μ F Li-Ion
BATTERY
2V
1.5V
1V
CURRENT
V PROG
VOLTAGE
1734 TA01
0V
CHARGING
BEGINS
CHARGING
COMPLETE
1734 TA01b
1
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