900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LT1511 Datasheet

Constant-Current/ Constant-Voltage 3A Battery Charger with Input Current Limiting

No Preview Available !

LT1511
Constant-Current/
Constant-Voltage 3A Battery
Charger with Input Current Limiting
FEATURES
s Simple Design to Charge NiCd, NiMH and Lithium
Rechargeable Batteries—Charging Current
Programmed by Resistors or DAC
s Adapter Current Loop Allows Maximum Possible
Charging Current During Computer Use
s Precision 0.5% Accuracy for Voltage Mode Charging
s High Efficiency Current Mode PWM with 4A Internal
Switch
s 5% Charging Current Accuracy
s Adjustable Undervoltage Lockout
s Automatic Shutdown When AC Adapter is Removed
s Low Reverse Battery Drain Current: 3µA
s Current Sensing Can Be at Either Terminal of the Battery
s Charging Current Soft-Start
s Shutdown Control
U
APPLICATIO S
s Chargers for NiCd, NiMH, Lead-Acid, Lithium
Rechargeable Batteries
s Switching Regulators with Precision Current Limit
, LTC and LT are registered trademarks of Linear Technology Corporation.
*See LT1510 for 1.5A Charger
DESCRIPTIO
The LT®1511 current mode PWM battery charger is the
simplest, most efficient solution to fast charge modern
rechargeable batteries including lithium-ion (Li-Ion), nickel-
metal-hydride (NiMH) and nickel-cadmium (NiCd) that
require constant-current and/or constant-voltage charg-
ing. The internal switch is capable of delivering 3A* DC
current (4A peak current). Full-charging current can be
programmed by resistors or a DAC to within 5%. With 0.5%
reference voltage accuracy, the LT1511 meets the critical
constant-voltage charging requirement for Li-Ion cells.
A third control loop is provided to regulate the current
drawn from the AC adapter. This allows simultaneous
operation of the equipment and battery charging without
overloading the adapter. Charging current is reduced to
keep the adapter current within specified levels.
The LT1511 can charge batteries ranging from 1V to 20V.
Ground sensing of current is not required and the battery’s
negative terminal can be tied directly to ground. A saturat-
ing switch running at 200kHz gives high charging effi-
ciency and small inductor size. A blocking diode is not
required between the chip and the battery because the
chip goes into sleep mode and drains only 3µA when the
wall adapter is unplugged.
TYPICAL APPLICATIO
GND CLP
D1
MBRD340
L1**
20µH
D2
MBR0540T
C2
0.47µF
200pF
SW
BOOST
LT1511
COMP1
CLN
VCC
UV
PROG
SPIN
VC
OVP SENSE BAT
NOTE: COMPLETE LITHIUM-ION CHARGER,
NO TERMINATION REQUIRED. RS4, R7
AND C1 ARE OPTIONAL FOR IIN LIMITING
*TOKIN OR UNITED CHEMI-CON/MARCON
CERAMIC SURFACE MOUNT
**20µH COILTRONICS CTX20-4
SEE APPLICATIONS INFORMATION FOR
INPUT CURRENT LIMIT AND UNDERVOLTAGE LOCKOUT
RS3
200
1%
RS2
200
1%
RS1
0.033
BATTERY CURRENT
SENSE
50pF
R7
500
C1
1µF
++
10µF
CIN*
10µF
D3
MBRD340
RS4
ADAPTER
CURRENT SENSE
VIN (ADAPTER INPUT)
11V TO 28V
TO MAIN
R5SYSTEM POWER
UNDERVOLTAGE
LOCKOUT
1k
0.33µF
300
CPROG
1µF
RPROG
4.93k
1%
R6
5k
R3
390k
0.25%
BATTERY
VOLTAGE SENSE
R4
162k
0.25%
+
COUT
22µF
TANT
+
4.2V
+
4.2V
VBAT
2 Li-Ion
1511 • F01
Figure 1. 3A Lithium-Ion Battery Charger
1


Linear Technology Electronic Components Datasheet

LT1511 Datasheet

Constant-Current/ Constant-Voltage 3A Battery Charger with Input Current Limiting

No Preview Available !

LT1511
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage
(VMAX, CLP and CLN Pin Voltage) ...................... 30V
Switch Voltage with Respect to GND ...................... – 3V
Boost Pin Voltage with Respect to VCC ................... 25V
Boost Pin Voltage with Respect to GND ................. 57V
Boost Pin Voltage with Respect to SW Pin .............. 30V
VC, PROG, OVP Pin Voltage ...................................... 8V
IBAT (Average)........................................................... 3A
Switch Current (Peak) .............................................. 4A
Operating Junction Temperature Range
Commercial ........................................... 0°C to 125°C
Industrial ......................................... – 40°C to 125°C
Operating Ambient Temperature
Commercial ............................................ 0°C to 70°C
Industrial ........................................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
GND** 1
SW 2
BOOST 3
GND** 4
GND** 5
UV 6
GND** 7
OVP 8
CLP 9
CLN 10
COMP1 11
SENSE 12
24 GND**
23 GND**
22 VCC1*
21 VCC2*
20 VCC3*
19 PROG
18 VC
17 UVOUT
16 GND**
15 COMP2
14 BAT
13 SPIN
SW PACKAGE
24-LEAD PLASTIC SO WIDE
TJMAX = 125°C, θJA = 30°C/ W**
Consult factory for Military grade parts.
ORDER PART
NUMBER
LT1511CSW
LT1511ISW
*ALL VCC PINS SHOULD
BE CONNECTED
TOGETHER CLOSE TO
THE PINS
** ALL GND PINS ARE
FUSED TO INTERNAL DIE
ATTACH PADDLE FOR
HEAT SINKING. CONNECT
THESE PINS TO
EXPANDED PC LANDS
FOR PROPER HEAT
SINKING. 30°C/W
THERMAL RESISTANCE
ASSUMES AN INTERNAL
GROUND PLANE
DOUBLING AS A HEAT
SPREADER
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 16V, VBAT = 8V, VMAX (maximum operating VCC) = 28V,
RS2 = RS3 = 200(see Block Diagram), VCLN = VCC. No load on any outputs unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX
Overall
Supply Current
Sense Amplifier CA1 Gain and Input Offset Voltage
(With RS2 = 200, RS3 = 200)
(Measured across RS1)(Note 2)
VCC Undervoltage Lockout (Switch OFF) Threshold
UV Pin Input Current
UV Output Voltage at UVOUT Pin
UV Output Leakage Current at UVOUT Pin
Reverse Current from Battery (When VCC Is
Not Connected, VSW Is Floating)
VPROG = 2.7V, VCC 20V
VPROG = 2.7V, 20V < VCC 25V
8V VCC 25V , 0V VBAT 20V
RPROG = 4.93k
RPROG = 49.3k
TJ < 0°C
VCC = 28V, VBAT = 20V
RPROG = 4.93k
RPROG = 49.3k
TJ < 0°C
Measured at UV Pin
0.2V VUV 8V
In Undervoltage State, IUVOUT = 70µA
8V VUV, VUVOUT = 5V
VBAT 20V, VUV 0.4V
q 4.5 6.8
q 4.6 7.0
q 95 100 105
q8
10 12
7 13
q 90
q7
6
110
13
14
q6 7 8
q 0.1 5
q 0.1 0.5
q 0.1 3
3 15
UNITS
mA
mA
mV
mV
mV
mV
mV
mV
V
µA
V
µA
µA
2


Part Number LT1511
Description Constant-Current/ Constant-Voltage 3A Battery Charger with Input Current Limiting
Maker Linear Technology
PDF Download

LT1511 Datasheet PDF






Similar Datasheet

1 LT1510 Constant-Voltage/ Constant-Current Battery Charger
Linear Technology
2 LT1510-5 Constant-Voltage/ Constant-Current Battery Charger
Linear Technology
3 LT1511 Constant-Current/ Constant-Voltage 3A Battery Charger with Input Current Limiting
Linear Technology
4 LT1512 SEPIC Constant-Current/ Constant-Voltage Battery Charger
Linear Technology
5 LT1513 SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger
Linear Technology
6 LT1513-2 SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger
Linear Technology





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy