参数资料
型号: LT3650EMSE-8.4#PBF
厂商: Linear Technology
文件页数: 1/22页
文件大小: 0K
描述: IC BATTERY CHARGER LI 12MSOP
标准包装: 37
功能: 充电管理
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 9 V ~ 32 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 12-TSSOP (0.118",3.00mm 宽)裸露焊盘
供应商设备封装: 12-MSOP,裸露焊盘
包装: 管件
产品目录页面: 1340 (CN2011-ZH PDF)
LT3650-8.2/LT3650-8.4
High Voltage 2 Amp
Monolithic 2-Cell
Li-Ion Battery Charger
Wide Input Voltage Range: 9V to 32V (40V Absolute
Programmable Charge Current: Up to 2A
User-Selectable Termination: C/10 or Onboard
Dynamic Charge Rate Programming/Soft-Start Pin
Programmable Input Current Limit
1MHz Fixed Frequency
Average Current Mode Control
0.5% Float Voltage Accuracy
5% Charge Current Accuracy
2.5% C/10 Detection Accuracy
NTC Resistor Temperature Monitor
Auto-Recharge at 97.5% Float Voltage
Auto-Precondition at <70% Float Voltage
Bad-Battery Detection with Auto-Reset
Binary Coded Open-Collector Status Pins
3mm × 3mm DFN-12 or MSOP-12 Package
Industrial Handheld Instruments
12V to 24V Automotive and Heavy Equipment
Desktop Cradle Chargers
Notebook Computers
FEATURES
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Maximum)
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Termination Timer
n
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APPLICATIONS
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L , LT, LTC, LTM, Linear Technology, PowerPath and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
DESCRIPTION
The LT ? 3650 is a complete monolithic 2-cell Li-Ion/Polymer
battery charger that operates over a 9V to 32V input volt-
age range (11.5V minimum start-up voltage). The LT3650
provides a constant-current/constant-voltage charge
characteristic, with maximum charge current externally
programmable up to 2A, set using an external current
sense resistor. A precondition feature trickle-charges a
low voltage battery, and bad-battery detection provides a
signal and suspends charging if a battery does not respond
to preconditioning.
The LT3650 can be configured to terminate charging when
charge current falls to C/10, or one-tenth the programmed
maximum current. Once charging is terminated, the LT3650
enters a low current (85μA) standby mode. An auto-restart
feature starts a new charging cycle if the battery voltage
drops 2.5% from the float voltage, or if a new battery is
inserted into a charging system.
The LT3650 contains a user-programmable internal safety
timer (typically set to a three hour full cycle time). The IC
can be configured to use this internal timer if a time-based
termination scheme is desired in which charging can con-
tinue below C/10 until a desired time is reached.
The LT3650 is available in a low profile (0.75mm) 3mm ×
3mm 12-pin DFN and 12-pin MSOP packages.
Charge Current, Efficiency and Power Loss vs Time
10μF
CMPSH1-4
V IN
11.5V TO 32V
CMSH3-40MA
11.5V to 32V 2-Cell 2A Charger
V IN SW
1μF
CLP BOOST
LT3650-8.2
SHDN
SENSE
CHRG
CMSH3-40MA
10μH
0.05
3.0
2.5
2.0
1.5
1.0
V IN = 20V
CHARGE
CURRENT
EFFICIENCY
POWER
LOSS
95
85
75
65
55
0.68μF
FAULT
TIMER
BAT
NTC
RNG/SS
10μF
+
BATTERY
0.5
0
0
45
35
20 40 60 80 100 120 140 160 180 200
365082 TA01a
TIME (MINUTES)
365082 TA01b
36508284fd
1
相关PDF资料
PDF描述
LTC4070EDDB#TRMPBF IC LI-ION/POLY BATT CHARGER 8DFN
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