LTC4011
High Efficiency Standalone
Nickel Battery Charger
Fae Tseru Dpircse Tnoi
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Complete NiMH/NiCd Charger for1 to 16 Cells
The LTC 4011 provides a complete, cost-effective nickel
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NoMicrocontroller or Firmware Required
battery fast charge solution in a small package using few
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550kHz Synchronous PWM Current Source Controller
external components. A 550kHz PWM current source
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NoAudible Noise with Ceramic Capacitors
controller and all necessary charge initiation, monitoring
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PowerPathControl Support
andtermination controlcir cuitry areincluded.
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ProgrammableCharge Current: 5%Accuracy
The LTC4011 automatically senses the presence of a
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WideInput V oltage Range:4.5V to34V
DC adapter and battery insertion or removal. Heavily
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Automatic Trickle Precharge
discharged batteries are precharged with a trickle cur-
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VFast Charge Termination
rent. The LTC4011 can simultaneously use both V and
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OptionalT/ t Fast ChargeT ermination
T/t fast charge termination techniques and can detect
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Automatic NiMH Top-OffCharge
various battery faults. If necessary, a top-off charge is
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ProgrammableT imer
automatically applied to NiMH batteries after fast charg-
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Automatic Recharge
ing is completed. The IC will also resume charging if the
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MultipleStatus Outputs
batteryself-discharges after a full charge cycle.
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MicropowerShutdown
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All LTC4011 charging operations are qualified by actual
20-Lead Thermally EnhancedTSSOP Package
charge time and maximum average cell voltage. Charging
may also be gated by minimum and maximum temperature
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limits. NiMH or NiCd fast charge termination parameters
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Integratedor Standalone Battery Charger
arepin-selectable.
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Portable Instruments orConsumer Products
Integrated PowerPath control support ensures that the
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Battery-PoweredDiagnostics and Control
system remains powered at all times without allowing load
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Back-Up BatteryManagement
transients to adversely affect charge termination.
L, LT, LTC, LTM, LinearT echnology and theLinear logo are registered trademarksof Linear
Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. All other
trademarks are theproperty of their respective owners.
T lacipy a acilpp Tn oi
2ANiMH Battery Charger
2A NiMH Charge Cycle at 1C
FROM
ADAPTER
5V
10F
INFET
FAULT
CHRG
TOC
READY
4.7H
10F
0.033F 0.068F
0.1F
4011fb
LTC4011
a ulosb T e Mixa Mu M r a Tsgni p ni c no Farugi Tnoi
(Note 1)
TOP VIEW
V (Input Supply) to GND......................... 0.3V to 36V
CC
DCIN 1 20 INFET
DCIN to GND .............................................. 0.3V to 36V
FAULT 2 19 READY
FAULT, CHRG, V , V , SENSE, BAT, TOC
CELL CDIV
CHRG 3 18 V
CC
or READY to GND ........................... 0.3V to V + 0.3V
CC
CHEM 4 17 TGATE
SENSE to BAT ........................................................0.3V
GND 5 16 PGND
CHEM, V or TIMER to GND ................ 0.3V to 3.5V 21
TEMP
V 6 15 BGATE
RT
PGND to GND......................................................... 0.3V
V 7 14 INTV
TEMP DD
Operating Ambient Temperature Range
V 8
13 TOC
CELL
(Note 2) ........................................................ 0C to 85C
9
V 12 BAT
CDIV
Operating Junction Temperature (Note 3) ............. 125C
TIMER 10 11 SENSE
Storage Temperature Range ...................65C to 150C
FE PACKAGE
Lead Temperature (Soldering, 10 sec) .................. 300C
20-LEAD PLASTIC TSSOP
T =125C, = 38C/W
JMAX JA
EXPOSED PAD(PIN 21)IS GND, MUST BE SOLDEREDTO PCB
TO OBTAIN SPECIFIED THERMAL RESISTANCE
o r D re i n Fro Ma Tnoi
LEAD FREEFINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4011CFE#PBF LTC4011CFE#TRPBF LTC4011CFE 20-Lead Plastic TSSOP 0C to85C
LEADBASED FINISH TAPE AND REEL PARTMARKING PACKAGEDESCRIP TION TEMPERATURERANGE
LTC4011CFE LTC4011CFE#TR LTC4011CFE 20-Lead PlasticTSSOP 0C to 85C
Consult LTC Marketing for parts specifiedwith wider operating temperature ranges.
For more information on leadfree partmarking, go to: