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Linear Technology Electronic Components Datasheet

LTC4076EDD Datasheet

Dual Input Standalone Li-Ion Battery Charger

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FEATURES
Charges Single-Cell Li-Ion Batteries from Wall
Adapter and USB Inputs
Automatic Input Power Detection and Selection
Charge Current Programmable up to 950mA from
Wall Adapter Input
C/X Charge Current Termination
Thermal Regulation Maximizes Charge Rate
Without Risk of Overheating*
Preset Charge Voltage with ±0.6% Accuracy
18µA USB Suspend Current in Shutdown
Power Present Status Output
Charge Status Output
Automatic Recharge
Available in a Thermally Enhanced, Low Profile
(0.75mm) 10-Lead (3mm × 3mm) DFN Package
U
APPLICATIO S
Cellular Telephones
Handheld Computers
Portable MP3 Players
Digital Cameras
LTC4076 www.DataSheet4U.com
Dual Input Standalone
Li-Ion Battery Charger
DESCRIPTIO
The LTC®4076 is a standalone linear charger that is capable
of charging a single-cell Li-Ion battery from both wall
adapter and USB inputs. The charger can detect power at
the inputs and automatically select the appropriate power
source for charging.
No external sense resistor or blocking diode is required
for charging due to the internal MOSFET architecture.
Internal thermal feedback regulates the battery charge
current to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The float voltage is fixed at 4.2V and the charge current
is programmed with an external resistor. The LTC4076
terminates the charge cycle when the charge current drops
below the user programmed termination threshold after
the final float voltage is reached. The LTC4076 can be put
into shutdown mode reducing the DCIN supply current to
20µA, the USBIN supply current to 10µA, and the battery
drain current to less than 2µA even with power applied
to both inputs.
Other features include automatic recharge, undervoltage
lockout, charge status output, power present status output
to indicate the presence of wall adapter or USB power and
high power/low power mode (C/5) for USB compatible
applications.
, 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 6522118
TYPICAL APPLICATIO
Dual Input Battery Charger for Single-Cell Li-Ion
WALL
ADAPTER
USB
PORT
1F
LTC4076
DCIN
BAT
USBIN HPWR
1F
IUSB
2k
IDC
ITERM
1% 1.24k
GND
1%
800mA (WALL)
500mA (USB)
+ 4.2V
SINGLE CELL
Li-Ion BATTERY
1k
1%
4076 TA01
Complete Charge Cycle (1100mAh Battery)
1000
800
600
400
200
0
4.2
4.0
3.8
3.6
3.4
5.0
2.5
0
CONSTANT VOLTAGE
USBIN = 5V
TA = 25°C
RIDC = 1.24k
RIUSB = 2k
HPWR = 5V
0 0.5 1.0 1.5 2.0 2.5 3.0
TIME (HR)
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Linear Technology Electronic Components Datasheet

LTC4076EDD Datasheet

Dual Input Standalone Li-Ion Battery Charger

No Preview Available !

LTC4076
ABSOLUTE AXI U RATI GS
(Notes 1, 7)
Input Supply Voltage (DCIN, USBIN) ......... –0.3V to 10V
EN, CHRG, PWR, HPWR ............................ –0.3V to 10V
BAT, IDC, IUSB, ITERM ................................ –0.3V to 7V
DCIN Pin Current (Note 6) ..........................................1A
USBIN Pin Current (Note 6) .................................700mA
BAT Pin Current (Note 6) ............................................1A
BAT Short-Circuit Duration............................ Continuous
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range.................. –65°C to 125°C
www.DataSheet4U.com
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
USBIN 1
IUSB 2
ITERM 3
PWR 4
CHRG 5
10 DCIN
9 BAT
11
8 IDC
7 HPWR
6 EN
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 40°C/W (NOTE 3)
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
LTC4076EDD
DD PART MARKING
LBWC
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDCIN = 5V, VUSBIN = 5V, HPWR = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VDCIN
VUSBIN
IDCIN
Supply Voltage
Supply Voltage
DCIN Supply Current
Charge Mode (Note 4), RIDC = 10k
Standby Mode; Charge Terminated
Shutdown Mode (EN = 5V)
4.3
8
V
4.3
8
V
250
800
µA
50
100
µA
20
40
µA
IUSBIN
USBIN Supply Current
Charge Mode (Note 5), RIUSB = 10k, VDCIN = 0V
Standby Mode; Charge Terminated, VDCIN = 0V
Shutdown (VDCIN = 0V, EN = 5V)
VDCIN > VUSBIN
250
800
µA
50
100
µA
18
36
µA
10
20
µA
VFLOAT
Regulated Output (Float) Voltage
IBAT = 1mA (Note 7)
4.175 4.2 4.225
V
IBAT = 1mA, 0°C < TA < 85°C, 4.3V < VCC < 8V
4.158 4.2 4.242
V
IBAT
BAT Pin Current
RIDC = 1.25k, Constant-Current Mode
RIUSB = 2.1k, Constant-Current Mode
RIUSB = 2.1k, HPWR = 0V
RIDC = 10k or RIUSB = 10k
Standby Mode, Charge Terminated
760
800
840
mA
450
476
500
mA
84
95
105
mA
92
100
108
mA
–3
–6
µA
Shutdown Mode (Charger Disabled)
–1
–2
µA
Sleep Mode (VDCIN = 0V, VUSBIN = 0V)
±1
±2
µA
VIDC
IDC Pin Regulated Voltage
Constant-Current Mode
0.95
1
1.05
V
VIUSB
IUSB Pin Regulated Voltage
Constant-Current Mode
0.95
1
1.05
V
ITERMINATE
Charge Current Termination Threshold
RITERM = 1k
RITERM = 2k
RITERM = 10k
RITERM = 20k
90
100
110
mA
45
50
55
mA
8
10
12
mA
3.5
5
6.5
mA
4076fa
2


Part Number LTC4076EDD
Description Dual Input Standalone Li-Ion Battery Charger
Maker Linear
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