900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC4079IDD Datasheet

250mA Linear Charger

No Preview Available !

LTC4079
60V, 250mA Linear Charger
with Low Quiescent Current
Features
n Wide Input Voltage Range: 2.7V to 60V
n Adjustable Battery Voltage: 1.2V to 60V
n Adjustable Charge Current: 10mA to 250mA
n Low Quiescent Current While Charging: IIN = 4µA
n Ultralow Battery Drain When Shutdown or Charged:
IBAT < 0.01µA
n Auto Recharge
n Input Voltage Regulation for High Impedance Sources
n Thermal Regulation Maximizes Output Current
without Overheating
n Constant Voltage Feedback with ±0.5% Accuracy
n NTC Thermistor Input for Temperature Qualified
Charging
n Adjustable Safety Timer
n Charging Status Indication
n Thermally Enhanced 10-Lead (3mm × 3mm)
DFN Package
Applications
n Embedded Automotive and Industrial
n Backup Battery Charging from Another Battery
n Energy Harvesting Charger
n Thin Film Battery Products
Description
The LTC®4079 is a low quiescent current, high voltage
linear charger for most battery chemistry types including
Li-Ion/Polymer, Lead-Acid or NiMH battery stacks up to
60V. The maximum charge current is adjustable from
10mA to 250mA with an external resistor. The battery
charge voltage is set using an external resistor divider.
With an integrated power device, current sensing and
reverse current protection, a complete charging solution
using the LTC4079 requires very few external components.
Thermal regulation ensures maximum charge current up to
the specified limit without the risk of overheating. Charging
can be terminated by either C/10 or adjustable timer.
Input voltage regulation reduces charge current when
the input voltage falls to an adjustable level or the battery
voltage, making it well suited for energy harvesting
applications. Other features include temperature qualified
charging, bad battery detection, automatic recharge with
sampled feedback in standby for negligible battery drain,
and an open-drain CHRG status output. The device is
offered in a compact, thermally enhanced 10-lead (3mm
× 3mm) DFN package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
9V TO 60V
Charging a Backup Battery
IN
BAT
1µF
LTC4079
EN
FB
3.01k
CHRG
FBG
PROG NTCBIAS
TIMER NTC
GND
8.4V
1.54M
249k
10k
+
T 10k
Li-Ion
4079 TA01a
Li-Ion Battery Charge Cycle
140
8.6
500mAh 2-CELL LI-ION
120
VBAT
8.4
100
IBAT
8.2
80
8.0
60
7.8
40
C/10
TERMINATION
7.6
20
7.4
0
7.2
012345678
TIME (HOURS)
4079 TA01b
For more information www.linear.com/LTC4079
4079f
1


Linear Technology Electronic Components Datasheet

LTC4079IDD Datasheet

250mA Linear Charger

No Preview Available !

LTC4079
Absolute Maximum Ratings
(Notes 1, 2)
IN, BAT, EN, CHRG, FB, FBG Voltage........... –0.3V to 62V
PROG TIMER Voltage...................................................3V
BAT Current....................................................... –400mA
PROG Current...................................................... –1.6mA
FBG Current..............................................................2mA
CHRG Current...........................................................2mA
Operating Junction Temperature Range
(Notes 3, 5)................................................. –40 to 125°C
Storage Temperature Range.......................–65 to 150°C
Pin Configuration
TOP VIEW
IN 1
EN 2
PROG 3
NTCBIAS 4
NTC 5
10 BAT
11
9 FB
GND
8 FBG
7 CHRG
6 TIMER
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4079EDD#PBF
LTC4079EDD#TRPBF LGNQ
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC4079IDD#PBF
LTC4079IDD#TRPBF
LGNQ
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard 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/
4079f
2
For more information www.linear.com/LTC4079


Part Number LTC4079IDD
Description 250mA Linear Charger
Maker Linear
PDF Download

LTC4079IDD Datasheet PDF






Similar Datasheet

1 LTC4079IDD 250mA Linear Charger
Linear





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