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Linear Technology Electronic Components Datasheet

LTC4009-1 Datasheet

Multi-Chemistry Battery Charger

No Preview Available !

FEATURES
n General Purpose Battery Charger Controller
n Efficient 550kHz Synchronous Buck PWM Topology
n ±0.5% Output Float Voltage Accuracy
n Programmable Charge Current: 4% Accuracy
n Programmable AC Adapter Current Limit:
3% Accuracy
wwwn.DaNtoaSAhueedti4bUl.ecoNmoise with Ceramic Capacitors
n Wide Input Voltage Range: 6V to 28V
n Wide Output Voltage Range: 2V to 28V
n Indicator Outputs for AC Adapter Present, Charging,
C/10 Current Detection and Input Current Limiting
n Analog Charge Current Monitor
n Micropower Shutdown
n Thermally Enhanced 20-Pin 4mm × 4mm × 0.75mm
QFN Package
APPLICATIONS
n Notebook Computers
n Portable Instruments
n Battery Backup Systems
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5723970.
LTC4009
LTC4009-1/LTC4009-2
High Efficiency,
Multi-Chemistry
Battery Charger
DESCRIPTION
The LTC4009 is a constant-current/constant-voltage battery
charger controller. It uses a synchronous quasi-constant
frequency PWM control architecture that will not generate
audible noise with ceramic bulk capacitors. Charge cur-
rent is set by the combination of external sense, input and
programming resistors. With no built-in termination, the
LTC4009 family charges a wide range of batteries under
external control.
The LTC4009 features a fully adjustable output voltage, while
the LTC4009-1 and LTC4009-2 can be pin-programmed for
lithium-ion/polymer battery packs of 1-, 2-, 3- or 4-series
cells. The LTC4009-1 provides output voltage of 4.1V/cell,
and the LTC4009-2 is a 4.2V/cell version.
The device includes AC adapter input current limiting which
maximizes the charge rate for a fixed input power level. An
external sense resistor programs the input current limit, and
the ICL status pin indicates when the battery charge current
is being reduced as a result of AC adapter current limiting.
The CHRG status pin is active during all charging modes,
including special indication for low charge current.
TYPICAL APPLICATION
FROM
ADAPTER
13V TO 20V
0.1μF
CHARGE
CURRENT
MONITOR
14.3k
1.5k
TO/FROM
MCU
DCIN
CLP
CLN
DCDIV BOOST
LTC4009
TGATE
CHRG
ACP
SW
INTVDD
ICL BGATE
SHDN GND
ITH
6.04k
CSP
0.1μF
PROG
4.7nF 26.7k
CSN
BAT
FBDIV
VFB
33mΩ
0.1μF
5.1k
0.1μF
2μF
3.01k
3.01k
301k
32.8k
20μF
20μF
POWER TO
SYSTEM
6.8μH
33mΩ
+ 12.3V
Li-Ion
BATTERY
4009 TA01a
Efficiency at DCIN = 20V
100 10000
95
90
85
80
75
70
0
EFFICIENCY
POWER LOSS
1000
VFLOAT = 12.3V
RSENSE = 33mΩ
RIN = 3.01k
RPROG = 26.7k
DIN = SSB44
L = IHLP-2525CZ 6.8μH
100
0.5 1.0 1.5 2.0 2.5 3.0
CHARGE CURRENT (A)
4009 TA01b
4009fb
1


Linear Technology Electronic Components Datasheet

LTC4009-1 Datasheet

Multi-Chemistry Battery Charger

No Preview Available !

LTC4009
LTC4009-1/LTC4009-2
ABSOLUTE MAXIMUM RATINGS (Note 1)
DCIN, CLP, CLN or SW to GND................... –0.3V to 30V
CLP to CLN ............................................................±0.3V
CSP, CSN or BAT to GND ............................ –0.3V to 28V
CSP to CSN............................................................±0.3V
BOOST to GND........................................... –0.3V to 36V
BOOST to SW............................................... –0.3V to 7V
DCDIV, SHDN, FVS0, FVS1 or VFB to GND.... –0.3V to 7V
ACP, CHRG or ICL to GND ......................... –0.3V to 30V
Operating Temperature Range (Note 2)........ 0°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
www.DLTaCt4a0S0h9eet4U.com
TOP VIEW
20 19 18 17 16
CLN 1
CLP 2
DCIN 3
ICL 4
DCDIV 5
15 CSP
14 CSN
21 13 PROG
12 ITH
11 BAT
6 7 8 9 10
UF PACKAGE
20-LEAD (4mm s 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
LTC4009-1
LTC4009-2
TOP VIEW
20 19 18 17 16
CLN 1
CLP 2
DCIN 3
ICL 4
DCDIV 5
15 CSP
14 CSN
21 13 PROG
12 ITH
11 BAT
6 7 8 9 10
UF PACKAGE
20-LEAD (4mm s 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC4009CUF#PBF
LTC4009CUF#TRPBF
4009
20-Lead (4mm × 4mm) Plastic QFN
LTC4009CUF-1#PBF
LTC4009CUF-1#TRPBF 40091
20-Lead (4mm × 4mm) Plastic QFN
LTC4009CUF-2#PBF
LTC4009CUF-2#TRPBF 40092
20-Lead (4mm × 4mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
0°C to 85°C
0°C to 85°C
0°C to 85°C
4009fb
2


Part Number LTC4009-1
Description Multi-Chemistry Battery Charger
Maker Linear Technology
Total Page 28 Pages
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