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LTC4011CFEPBF

Description
High Efficiency Standalone Nickel Battery Charger
File Size645KB,26 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC4011CFEPBF Overview

High Efficiency Standalone Nickel Battery Charger

LTC4011
High Efficiency Standalone
Nickel Battery Charger
FeaTures
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DescripTion
The LTC
®
4011 provides a complete, cost-effective nickel
battery fast charge solution in a small package using few
external components. A 550kHz PWM current source
controller and all necessary charge initiation, monitoring
and termination control circuitry are included.
The LTC4011 automatically senses the presence of a
DC adapter and battery insertion or removal. Heavily
discharged batteries are precharged with a trickle cur-
rent. The LTC4011 can simultaneously use both –∆V and
∆T/∆t fast charge termination techniques and can detect
various battery faults. If necessary, a top-off charge is
automatically applied to NiMH batteries after fast charg-
ing is completed. The IC will also resume charging if the
battery self-discharges after a full charge cycle.
All LTC4011 charging operations are qualified by actual
charge time and maximum average cell voltage. Charging
may also be gated by minimum and maximum temperature
limits. NiMH or NiCd fast charge termination parameters
are pin-selectable.
Integrated PowerPath control support ensures that the
system remains powered at all times without allowing load
transients to adversely affect charge termination.
Complete NiMH/NiCd Charger for 1 to 16 Cells
No Microcontroller or Firmware Required
550kHz Synchronous PWM Current Source Controller
No Audible Noise with Ceramic Capacitors
PowerPath™ Control Support
Programmable Charge Current: 5% Accuracy
Wide Input Voltage Range: 4.5V to 34V
Automatic Trickle Precharge
–∆V Fast Charge Termination
Optional ∆T/∆t Fast Charge Termination
Automatic NiMH Top-Off Charge
Programmable Timer
Automatic Recharge
Multiple Status Outputs
Micropower Shutdown
20-Lead Thermally Enhanced TSSOP Package
applicaTions
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Integrated or Standalone Battery Charger
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Portable Instruments or Consumer Products
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Battery-Powered Diagnostics and Control
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Back-Up Battery Management
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Typical applicaTion
2A NiMH Battery Charger
FROM
ADAPTER
5V
INFET
FAULT
CHRG
TOC
READY
10µF
2A NiMH Charge Cycle at 1C
4.7µH
10µF
0.1µF
0.033µF
0.068µF
4011fb


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