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LT1505CG

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

LT1505CG Overview

Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 28-Pin SSOP

LT1505CG Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instruction5.30 MM, PLASTIC, SSOP-28
Reach Compliance Codenot_compliant
ECCN codeEAR99
Is SamacsysN
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G28
JESD-609 codee0
length10.2 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals28
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height2 mm
Maximum supply voltage (Vsup)24 V
Minimum supply voltage (Vsup)11 V
Nominal supply voltage (Vsup)18 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
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 28-Pin SSOP 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 Tube Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 4000mA 2.5V to 20V 28-Pin SSOP T/R
Is it Rohs certified? incompatible conform to - conform to -
Maker ADI ADI - ADI -
package instruction 5.30 MM, PLASTIC, SSOP-28 SSOP, - SSOP, -
Reach Compliance Code not_compliant compliant - compliant -
Is Samacsys N N - N -
Analog Integrated Circuits - Other Types POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT - BATTERY CHARGE CONTROLLER -
JESD-30 code R-PDSO-G28 R-PDSO-G28 - R-PDSO-G28 -
JESD-609 code e0 e3 - e3 -
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, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH - SMALL OUTLINE, HEAT SINK/SLUG -
Peak Reflow Temperature (Celsius) 235 260 - 260 -
Certification status Not Qualified Not Qualified - Not Qualified -
Maximum seat height 2 mm 2 mm - 1.99 mm -
surface mount YES YES - YES -
Temperature level COMMERCIAL COMMERCIAL - COMMERCIAL -
Terminal surface Tin/Lead (Sn/Pb) MATTE TIN - MATTE TIN -
Terminal form GULL WING GULL WING - GULL WING -
Terminal pitch 0.65 mm 0.65 mm - 0.65 mm -
Terminal location DUAL DUAL - SINGLE -
Maximum time at peak reflow temperature 20 30 - NOT SPECIFIED -
width 5.3 mm 5.3 mm - 5.3 mm -
Base Number Matches 1 1 - 1 -
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