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LT1505CG-1#PBF

Description
Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 2.5V to 20V 28-Pin SSOP Tube
CategoryPower/power management    The power supply circuit   
File Size180KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric Compare View All

LT1505CG-1#PBF Overview

Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 2.5V to 20V 28-Pin SSOP Tube

LT1505CG-1#PBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionSSOP,
Contacts28
Manufacturer packaging code05-08-1640 (G28)
Reach Compliance Codecompliant
Is SamacsysN
Analog Integrated Circuits - Other TypesBATTERY CHARGE CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage24 V
Minimum input voltage11 V
Nominal input voltage18 V
JESD-30 codeR-PDSO-G28
JESD-609 codee3
length10.2 mm
Humidity sensitivity level1
Number of functions1
Number of terminals28
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, HEAT SINK/SLUG
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.99 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency220 kHz
Temperature levelCOMMERCIAL
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationSINGLE
Maximum time at peak reflow temperatureNOT SPECIFIED
width5.3 mm
Base Number Matches1
FEATURES
s
s
s
s
LT1505
Constant-Current/Voltage
High Efficiency Battery Charger
DESCRIPTIO
The LT
®
1505 PWM battery charger controller fast charges
multiple battery chemistries including lithium-ion (Li-Ion),
nickel-metal-hydride (NiMH) and nickel-cadmium (NiCd)
using constant-current or constant-voltage control. Maxi-
mum current can be easily programmed by resistors or a
DAC. The constant-voltage output can be selected for 3 or 4
series Li-Ion cells with 0.5% accuracy.
A third control loop limits the current drawn from the AC
adapter during charging*. This allows simultaneous opera-
tion of the equipment and fast battery charging without over-
loading the AC adapter.
The LT1505 can charge batteries ranging from 2.5V to 20V
with dropout voltage as low as 0.5V. Synchronous
N-channel FETs switching at 200kHz give high efficiency
and allow small inductor size. A diode is not required in
series with the battery because the charger automatically
enters a 10µA sleep mode when the wall adapter is un-
plugged. A logic output indicates Li-Ion full charge when
current drops to 20% of the programmed value.
The LT1505 is available in a 28-pin SSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
*US Patent No. 5,723,970
s
s
s
s
s
s
s
s
Simple Charging of Li-Ion, NiMH and NiCd Batteries
Very High Efficiency: Up to 97%
Precision 0.5% Charging Voltage Accuracy
Preset Battery Voltages: 12.3V, 12.6V,
16.4V and 16.8V
5% Charging Current Accuracy
Charging Current Programmed by Resistor or DAC
0.5V Dropout Voltage, Duty Cycle > 99.5%
AC Adapter Current Limit* Maximizes Charging Rate
Flag Indicates Li-Ion Charge Completion
Auto Shutdown with Adapter Removal
Only 10µA Battery Drain When Idle
Synchronizable Up to 280kHz
APPLICATIO S
s
s
s
Notebook Computers
Portable Instruments
Chargers for Li-Ion, NiMH, NiCd and Lead Acid
Rechargeable Batteries
TYPICAL APPLICATION
M3
Si4435
DBODY*
V
IN
(FROM
ADAPTER)
TO
SYSTEM POWER
R
S4
0.025Ω
C1
1µF
C
IN
47µF
35V
V
CC
BOOST
BOOSTC
GBIAS
CLN
CLP
INFET
UV
R6
4k
SYNC
SHDN
FLAG
*BODY DIODE
POLARITY MUST
BE AS SHOWN
C6
0.1µF
CAP
COMP1
R1
1k
C7
0.68µF
BAT2 BAT
SENSE
LT1505
TGATE
SW
BGATE
V
C
PROG
3 CELL
V
FB
4.2V
4.1V
AGND
PGND
SPIN
300Ω
C
PROG
1µF
R
PROG
4.93k
1%
R
X4
3k
0.33µF
R
S2
200Ω
1%
R
S3
200Ω
1%
5Ω
C3
D2
2.2µF MMSD4148T1
M1
Si4412
M2
Si4412
D4
MBRS140
C4
0.1µF
D3
MMSD4148T1
C2
0.68µF
L1
15µH
R
S1
0.025Ω
V
BAT
C
OUT
22µF
25V
×
2
12.6V
BATTERY
R7
500Ω
100k
R5
4k
* DBODY IS THE BODY DIODE OF M3
C
IN
: SANYO OS-CON
L1: SUMIDA CDRH127-150
(CAN BE FROM 10µH TO 30µH)
1505 F01
Figure 1. Low Dropout 4A Lithium-Ion Battery Charger
1505fc
U
U
U
1

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Description Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 2.5V to 20V 28-Pin SSOP Tube Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 2.5V to 20V 28-Pin SSOP Tube Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 2.5V to 20V 28-Pin SSOP T/R Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 2.5V to 20V 28-Pin SSOP T/R Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 28-Pin SSOP
Is it Rohs certified? conform to conform to - - incompatible
Maker ADI ADI - - ADI
package instruction SSOP, SSOP, - - 5.30 MM, PLASTIC, SSOP-28
Reach Compliance Code compliant compliant - - not_compliant
Is Samacsys N N - - N
Analog Integrated Circuits - Other Types BATTERY CHARGE CONTROLLER POWER SUPPLY SUPPORT CIRCUIT - - POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code R-PDSO-G28 R-PDSO-G28 - - R-PDSO-G28
JESD-609 code e3 e3 - - e0
length 10.2 mm 10.2 mm - - 10.2 mm
Humidity sensitivity level 1 1 - - 1
Number of functions 1 1 - - 1
Number of terminals 28 28 - - 28
Maximum operating temperature 70 °C 70 °C - - 70 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY - - PLASTIC/EPOXY
encapsulated code SSOP SSOP - - SSOP
Package shape RECTANGULAR RECTANGULAR - - RECTANGULAR
Package form SMALL OUTLINE, HEAT SINK/SLUG SMALL OUTLINE, SHRINK PITCH - - SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 260 260 - - 235
Certification status Not Qualified Not Qualified - - Not Qualified
Maximum seat height 1.99 mm 2 mm - - 2 mm
surface mount YES YES - - YES
Temperature level COMMERCIAL COMMERCIAL - - COMMERCIAL
Terminal surface MATTE TIN MATTE TIN - - Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING - - GULL WING
Terminal pitch 0.65 mm 0.65 mm - - 0.65 mm
Terminal location SINGLE DUAL - - DUAL
Maximum time at peak reflow temperature NOT SPECIFIED 30 - - 20
width 5.3 mm 5.3 mm - - 5.3 mm
Base Number Matches 1 1 - - 1
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