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LM3647 数据表(PDF) 1 Page - Texas Instruments

部件名 LM3647
功能描述  Universal Battery Charger
Download  19 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM3647 数据表(HTML) 1 Page - Texas Instruments

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OBSOLETE
LM3647
www.ti.com
SNOS517H – MARCH 2000 – REVISED APRIL 2013
LM3647 Universal Battery Charger for Li-Ion, Ni-MH and Ni-Cd Batteries
Check for Samples: LM3647
1
FEATURES
DESCRIPTION
The LM3647 is a charge controller for Lithium-Ion (Li-
2
Auto-Adaptive Fast Charge
Ion),
Nickel-Metal
Hydride
(Ni-MH)
and
Nickel-
High-Resolution, Accurate Voltage Monitoring
Cadmium (Ni-Cd) batteries. The device can use
Prevents Li-Ion Undercharge or Overcharge
either a pulsed-current charging or a constant-current
Fast Charge, Pre-Charge and Maintenance
charging
technique.
The
device
can
also
be
configured to discharge before charging. Throughout
Currents are Provided. Different Currents are
the charging sequence the LM3647 monitors voltage
Selectable via External Resistors
and/or temperature and time in order to terminate
Fast-Charge Termination by
Δ Temperature/Δ
charging.
Time, Maximum Voltage, Maximum
Charge Termination Methods are:
Temperature, Negative
Δ Voltage and
Maximum Time
Negative Delta Voltage (
−ΔV)
Optional: Delta Temperature/Delta Time (
ΔT/Δt)
Dynamically Detects Battery Insertion,
Removal, Short Circuit and Bad Battery
Backup: Maximum Temperature
Without Additional Hardware
Backup: Maximum Time
Supports Charging of Battery Packs with 2–8
Backup: Maximum Voltage
Cells of Ni-Cd/Ni-MH or 1–4 Cells of Li-Ion (1
If both voltage and temperature fail to trigger the
Cell of NiCd/NiMH can be Supported by Added
termination requirements, then the maximum time
External 2x Voltage Amplifier)
(configured by external hardware) steps in which
Three Optional LED Indicators and Buzzer
terminates the charging.
Output Indicate Operational Modes
In Ni-Cd/Ni-MH mode, four different charging stages
Ni-MH/Ni-Cd Charge Mode, Li-Ion Charge Mode
are used:
or Discharge Mode can be Selected Manually
Soft-Start Charge
Supports Control of Current Feedback Power
Fast Charge
Supply and Constant Current Power Supply
Topping Charge
Maintenance Charge
APPLICATIONS
In Li-Ion mode, four different charging stages are
Battery Charging Systems for:
used:
Portable Consumer Electronics
Qualification
Audio/Video Equipment
Fast Charge Phase 1, Constant Current
Communications Equipment
Fast Charge Phase 2, Constant Voltage
Point of Sale Devices
Maintenance Charge
Power Tools
The charge current of the LM3647 is configured via
Personal Convenience Products
external resistors, which in turn controls the duty
cycle of the PWM switching control output. For cost-
sensitive applications, the LM3647 charge controller
cab be configured to use an external current source
and no temperature sensor.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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