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LTC4091IDJC Datasheet

36V Battery Charger and Power Backup Manager

No Preview Available !

LTC4091
36V Battery Charger and
Power Backup Manager
FEATURES
n Seamless Transition Between Primary Power
Source and Li-Ion Battery
n 2A High Voltage Step-Down Regulator with
Adaptive Output Control
n Internal 75mΩ Ideal Diode Plus Optional External
Ideal Diode Controller Provides Low Loss
PowerPath™ When Primary Supply Not Present
n Wide Input Voltage Range: 6V to 36V (60V Abs Max)
n 4.45V Max Output Voltage
n Full Featured Li-Ion Battery Charger
n Pin Selectable 4.1V and 4.2V Charge Voltage Options
n Thermally Enhanced Low Profile (0.75mm)
6mm × 3mm 22-Lead DFN Package
APPLICATIONS
n Fleet and Asset Tracking
n Automotive GPS Data Loggers
n Automotive Telematics Systems
n Battery Backup Systems
DESCRIPTION
The LTC®4091 is a 36V Li-Ion battery charger and power
backup manager. The integrated step-down switching
regulator charges a battery from a primary power source
while providing power to the load. If primary power is lost,
the load is seamlessly transitioned to the backup Li-ion/
polymer battery. To protect sensitive downstream loads,
the maximum output voltage is 4.45V.
The LTC4091 provides an adaptive output that tracks the
battery voltage for high efficiency charging. The charge
current is programmable and an end-of-charge status
output (CHRG) indicates full charge. Also featured is a
termination timer and an NTC thermistor input used to
monitor battery temperature while charging.
During backup, an internal 75mΩ ideal diode connects the
battery to the load. An optional external ideal diode FET
driver is available to reduce the voltage drop even further.
4.1V or 4.2V battery charge voltages can be selected.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and PowerPath and Bat-Track are trademarks of Analog Devices, Inc. All other trademarks are
the property of their respective owners.
TYPICAL APPLICATION
AUTOMOTIVE
INPUT
6V TO 36V
0.47µF
VIN
4.7µF
VC
BOOST
SW
LTC4091
HVOUT
HVPR
OUT
BAT
TIMER
RT PROG GND
6.8µH
2A
MAX
3.3µF
4.99k
LOAD
4.45V MAX
68µF
+
Li-Ion BATTERY
15k
220pF
0.1µF 40.2k 52.3k
4091 TAO1a
For more information www.linear.com/LTC4091
VOUT, IBAT vs VBAT
4.8
2.0
IOUT = 1A
4.2
VOUT
3.6
1.5
3.0
2.4
VBAT
1.8
IBAT
1.0
1.2
0.5
0.6
0
0
0 0.6 1.2 1.8 2.4 3 3.6 4.2
BATTERY VOLTAGE (V)
4091 TA01b
4091fa
1


Analog Devices Semiconductor Electronic Components Datasheet

LTC4091IDJC Datasheet

36V Battery Charger and Power Backup Manager

No Preview Available !

LTC4091
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3, 4)
VIN, RUN/SS (Note 7)................................................60V
BOOST.......................................................................56V
BOOST Above SW......................................................30V
VINGD, SYNC.............................................................30V
OUT, HVOUT
t < 1ms and Duty Cycle < 1%.................... –0.3V to 7V
Steady State............................................. –0.3V to 6V
BAT, V4P1, VC, CHRG, HVPR......................... –0.3V to 6V
NTC, TIMER, PROG...........................–0.3V to VCC + 0.3V
IOUT, IBAT......................................................................4A
Operating Junction Temperature
Range..................................................... –40°C to 125°C
Storage Temperature Range.......................–65 to 150°C
PIN CONFIGURATION
TOP VIEW
SYNC 1
22 RUN/SS
VINGD 2
RT 3
21 VIN
20 SW
VC 4
NTC 5
VNTC 6
HVPR 7
19 BOOST
18 HVOUT
23
17 TIMER
GND
16 NC
CHRG 8
15 GND
PROG 9
14 V4P1
GATE 10
13 OUT
BAT 11
12 BAT
DJC PACKAGE
22-LEAD (6mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 31.8°C/W
EXPOSED PAD (PIN 23) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION http://www.linear.com/product/LTC4091#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4091EDJC#PBF
LTC4091EDJC#TRPBF 4091
22-Lead (6mm × 3mm) Plastic DFN –40°C to 125°C
LTC4091IDJC#PBF
LTC4091IDJC#TRPBF 4091
22-Lead (6mm × 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.
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/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
4091fa
2
For more information www.linear.com/LTC4091


Part Number LTC4091IDJC
Description 36V Battery Charger and Power Backup Manager
Maker Analog Devices
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