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LT3651EUHE-4.1#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LT3651-4.1/LT3651-4.2
1
365142ff
For more information www.linear.com/LT3651-4.1
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Monolithic 4A Wide Input
1 Cell Li-Ion Battery Charger
n
Industrial Handheld Instruments
n
12V to 24V Automotive and Heavy Equipment
n
Desktop Cradle Chargers
n
Notebook Computers
6.5V to 32V Single Cell 4A Charger
Efficiency, Power Loss vs DC
IN
n
Wide Input Voltage Range: Up to 32V
(40V Absolute Maximum)
n
Programmable Charge Current Up to 4A
n
Selectable C/10 or Onboard Timer Termination
n
Dynamic Charge Rate Programming/Soft-Start
n
Programmable Input Current Limit
n
0.5% Float Voltage Accuracy
n
7.5% Charge Current Accuracy
n
4% C/10 Detection Accuracy
n
NTC Resistor Temperature Monitor
n
Auto-Recharge at 97.5% Float Voltage
n
Auto-Precondition <70% Float Voltage
n
Bad Battery Detection with Auto-Reset
n
Average Current Mode, Synchronous Switcher
n
User Programmable Frequency
n
Low Profile (0.75mm) 5mm × 6mm 36-Pin
QFN Package
The LT
®
3651 is a 1 cell 4A Li-Ion/Polymer battery charger
that operates with input voltages up to 32V. An efficient
monolithic average current mode synchronous switching
regulator provides constant current, constant voltage
charging with programmable maximum charge current.
A charging cycle starts with battery insertion or when
the battery voltage drops 2.5% below the float voltage.
Charger termination is selectable as either charge current
or internal safety timer timeout. Charge current termina
-
tion occurs when the charge current falls to one-tenth
the programmed maximum current (C/10). Timer based
termination is typically set to three hours and is user pro
-
grammable (charging continues below C/10 until timeout).
Once charging is terminated, the LT3651 supply current
drops to 85µA into a standby mode.
The LT3651 offers several safety features. A discharged
battery is preconditioned with a small trickle charge and
generates a signal if unresponsive. A thermistor monitors
battery temperature, halting charging if out of range. Ex
-
cessive die temperature reduces charge current. Charge
current is also reduced to maintain constant input current
to prevent excessive input loading.
The LT3651 is available in a 5mm
× 6mm 36-pin QFN
package.
DC
IN
(V)
5
EFFICIENCY (%)
POWER LOSS (W)
83
84
85
86
15 25
365142 TA01b
82
81
80
3.2
3.6
4.0
4.4
2.8
2.4
2.0
10
20
30
V
BAT
= 3.9
E
FF
P
LOSS
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
RT
TIMER
SW
BOOST
SENSE
BAT
I
LIM
RNG/SS
GND
NTC
CLP
CLN
1µF
100µF
BATTERY
365142 TA01a
6.5µH
WÜRTH 744314650
TO
SYSTEM
LOAD
24mΩ
301k
DC
IN
6.5V TO 32V
1N5819
LT3651-4.2
V
IN
22µF
+
FAULT
CHRG
ACPR
SHDN
10V
Si7611DN
100k
100k
LT3651-4.1/LT3651-4.2
2
365142ff
For more information www.linear.com/LT3651-4.1
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
(Note 1)
11 12 13 14
TOP VIEW
37
38
UHE PACKAGE
36-LEAD (5mm × 6mm) PLASTIC QFN
15 16 17 18
36 35 34 33 32 31 30 29
21
22
23
24
25
26
27
28
8
7
6
5
4
3
2
1NTC
ACPR
BAT
SENSE
BOOST
GND
SW
NC
NC
NC
I
LIM
SHDN
CHRG
FAULT
TIMER
GND
SW
NC
NC
NC
RT
RNG/SS
V
IN
V
IN
V
IN
GND
CLN
CLP
SW
SW
SW
SW
SW
SW
SW
SW
20
19
9
10
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 37) IS GND, MUST BE SOLDERED TO PCB
EXPOSED PAD (PIN 38) IS SW
, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3651EUHE-4.1#PBF LT3651EUHE-4.1#TRPBF 365141
36-Lead (5mm × 6mm) Plastic QFN
–40°C to 125°C
LT3651IUHE-4.1#PBF LT3651IUHE-4.1#TRPBF 365141
36-Lead (5mm × 6mm) Plastic QFN
–40°C to 125°C
LT3651EUHE-4.2#PBF LT3651EUHE-4.2#TRPBF 365142
36-Lead (5mm × 6mm) Plastic QFN
–40°C to 125°C
LT3651IUHE-4.2#PBF LT3651IUHE-4.2#TRPBF 365142
36-Lead (5mm × 6mm) Plastic QFN
–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 non-standard 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/
V
IN
.......................................................................... 40V
CLN, CLP,
SHDN
,
CHRG
,
FAULT
,
ACPR
............................... V
IN
+ 0.5V Up to 40V
CLP – CLN .............................................................±0.5V
SW ...........................................................................40V
SW – V
IN
..................................................................4.5V
BOOST ......................................... SW + 10V Up to 50V
SENSE, BAT ............................................................ 10V
SENSE-BAT ............................................. –0.5V to 0.5V
TIMER, RNG/SS, I
LIM
, NTC, RT .............................. 2.5V
Operating Junction Temperature Range
(Notes 2, 3) ................................................–40 to 125°C
Storage Temperature Range .......................–65 to 150°C
LT3651-4.1/LT3651-4.2
3
365142ff
For more information www.linear.com/LT3651-4.1
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 20V, SHDN = 2V, SENSE = BAT = V
BAT(FLT)
,
C
TIMER
= 0.68µF, R
T
= 50k, CLP = CLN = V
IN
, BOOST – SW = 4V.
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Range
l
6.5 32 V
V
IN
OVLO Threshold V
IN
Rising 32 35 40 V
V
IN
OVLO Hysteresis 1.1 V
V
IN
UVLO Threshold V
IN
Rising
l
4.6 4.8 V
V
IN
UVLO Hysteresis 0.2 V
Battery Float Voltage, V
BAT(FLT)
LT3651-4.1
l
4.08
4.05
4.1 4.12
4.14
V
LT3651-4.2
l
4.18
4.16
4.2 4.22
4.24
V
Battery Recharge V
oltage Hysteresis Threshold Voltage Relative to V
BAT(FLT)
–105 mV
Battery Precondition Threshold Voltage,
V
BAT(PRE)
LT3651-4.1 V
BAT
Rising
LT3651-4.2 V
BAT
Rising
2.85
2.9
V
V
Battery Precondition Threshold Hysteresis Threshold Voltage Relative to V
BAT(PRE)
70 mV
Operating V
IN
Supply Current CC/CV Mode, Top Switch On, I
SW
= 0A
Standby Mode
Shutdown (SHDN = 0V)
8.6
85
17
mA
µA
µA
Top Switch On V
oltage V
IN
– V
SW
, I
SW
= 4A 480 mV
Bottom Switch On Voltage V
SW
, I
SW
= 4A –140 mV
BOOST Supply Current Switch High, I
SW
= 0A, 2.5V < (V
BOOST
– V
SW
) < 4.5V 40 mA
BOOST Switch Drive I
BOOST
/I
SW
, I
SW
= 4A 25 mA/A
Precondition Current Sense Voltage V
SENSE
– V
BAT
, V
BAT
= 2.5V 14 mV
Input Current Limit Voltage V
CLP
– V
CLN
, I
LIM
Open
l
70 95 115 mV
CLP Input Bias Current 120 nA
CLN Input Bias Current 36 µA
I
LIM
Bias Current
l
43 50 57 µA
System Current Limit Programming Gain V
ILIM
/(V
CLP
– V
CLN
), V
ILIM
= 0.5V 11.5 V/V
Maximum Charge Current Sense Voltage V
SENSE
– V
BAT
, V
BAT
= 3.5V, V
RNG/SS
> 1.1V
l
88 95 103 mV
C/10 Trigger Sense Voltage V
SENSE
– V
BAT
l
4.5 8.6 12.3 mV
BAT Input Bias Current Charging Terminated 0.1 1 µA
SENSE Input Bias Current Charging Terminated 0.1 1 µA
RNG/SS Bias Current
l
44 50 56 µA
Charge Current Limit Programming Gain V
RNG/SS
/(V
SENSE
– V
BAT
), V
RNG/SS
= 0.5V
l
8.5 10.8 12.5 V/V
NTC Range Limit (High) V
NTC
Rising
l
1.25 1.36 1.45 V
NTC Range Limit (Low) V
NTC
Falling
l
0.27 0.29 0.31 V
NTC Threshold Hysteresis % of Threshold 10 %
NTC Disable Impedance Minimum External Impedance to GND
l
150 470 kΩ
NTC Bias Current V
NTC
= 0.75V
l
46.5 50 53.5 µA
Shutdown Threshold V
SHDN
Rising
l
1.15 1.20 1.23 V
Shutdown Hysteresis 95 mV
SHDN Input Bias Current –10 nA
Status Low Voltage V
CHRG
, V
FAULT
, V
ACPR
, Load = 10mA
l
0.45 V
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LT3651EUHE-4.1#PBF

Mfr. #:
Buy LT3651EUHE-4.1#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Monolithic 4A High Voltage Li-Ion Battery Charger
Lifecycle:
New from this manufacturer.
Delivery:
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