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LT3650EDD-8.2#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LT3650-8.2/LT3650-8.4
1
36508284fd
Typical applicaTion
The LT
®
3650 is a complete monolithic 2-cell Li-Ion/Polymer
battery charger that operates over a 9V to 32V input volt-
age range (11.5V minimum start-up voltage). The LT3650
provides a constant-current/constant-voltage charge
characteristic, with maximum charge current externally
programmable up to 2A, set using an external current
sense resistor. A precondition feature trickle-charges a
low voltage battery, and bad-battery detection provides a
signal and suspends charging if a battery does not respond
to preconditioning.
The LT3650 can be configured to terminate charging when
charge current falls to C/10, or one-tenth the programmed
maximum current. Once charging is terminated, the LT3650
enters a low current (85µA) standby mode. An auto-restart
feature starts a new charging cycle if the battery voltage
drops 2.5% from the float voltage, or if a new battery is
inserted into a charging system.
The LT3650 contains a user-programmable internal safety
timer (typically set to a three hour full cycle time). The IC
can be configured to use this internal timer if a time-based
termination scheme is desired in which charging can con-
tinue below C/10 until a desired time is reached.
The LT3650
is available in a low profile (0.75mm) 3mm ×
3mm 12-pin DFN and 12-pin MSOP packages.
FeaTures
applicaTions
DescripTion
High Voltage 2 Amp
Monolithic 2-Cell
Li-Ion Battery Charger
11.5V to 32V 2-Cell 2A Charger
n
Wide Input Voltage Range: 9V to 32V (40V Absolute
Maximum)
n
Programmable Charge Current: Up to 2A
n
User-Selectable Termination: C/10 or Onboard
Termination Timer
n
Dynamic Charge Rate Programming/Soft-Start Pin
n
Programmable Input Current Limit
n
1MHz Fixed Frequency
n
Average Current Mode Control
n
0.5% Float Voltage Accuracy
n
5% Charge Current Accuracy
n
2.5% C/10 Detection Accuracy
n
NTC Resistor Temperature Monitor
n
Auto-Recharge at 97.5% Float Voltage
n
Auto-Precondition at <70% Float Voltage
n
Bad-Battery Detection with Auto-Reset
n
Binary Coded Open-Collector Status Pins
n
3mm × 3mm DFN-12 or MSOP-12 Package
n
Industrial Handheld Instruments
n
12V to 24V Automotive and Heavy Equipment
n
Desktop Cradle Chargers
n
Notebook Computers
365082 TA01a
SW
V
IN
V
IN
11.5V TO 32V
CLP
RNG/SS
BOOST
SENSE
BAT
NTC
TIMER
CMPSH1-4
CMSH3-40MACMSH3-40MA
1µF
10µF
10µH
0.05Ω
10µF
0.68µF
LT3650-8.2
BATTERY
SHDN
CHRG
FAULT
+
Charge Current, Efficiency and Power Loss vs Time
TIME (MINUTES)
0
CHARGE CURRENT (A), POWER LOSS (W)
EFFICIENCY (%)
1.0
2.0
3.0
0.5
1.5
2.5
35
55
75
95
45
65
85
40 80 120 160
365082 TA01b
200200 60 100 140 180
V
IN
= 20V
POWER
LOSS
EFFICIENCY
CHARGE
CURRENT
L, LT , LTC , LT M, Linear Technology, PowerPath and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective owners.
LT3650-8.2/LT3650-8.4
2
36508284fd
absoluTe MaxiMuM raTings
V
IN
............................................................................40V
SHDN, CHRG, FAU LT ...............................V
IN
+ 0.5V, 40V
CLP .........................................................V
IN
± 0.5V, 40V
SW ............................................................................40V
SW-V
IN
..................................................................... 4.5V
BOOST .................................................... SW + 10V, 50V
SENSE, BAT ..............................................................10V
(Note 1)
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3650EDD-8.2#PBF LT3650EDD-8.2#TRPBF LDXT 12-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C
LT3650IDD-8.2#PBF LT3650IDD-8.2#TRPBF LDXT 12-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C
LT3650EDD-8.4#PBF LT3650EDD-8.4#TRPBF LFGR 12-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C
LT3650IDD-8.4#PBF LT3650IDD-8.4#TRPBF LFGR 12-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C
LT3650EMSE-8.2#PBF LT3650EMSE-8.2#TRPBF 365082 12-Lead Plastic MSOP –40°C to 85°C
LT3650IMSE-8.2#PBF LT3650IMSE-8.2#TRPBF 365082 12-Lead Plastic MSOP –40°C to 85°C
LT3650EMSE-8.4#PBF LT3650EMSE-8.4#TRPBF 365084 12-Lead Plastic MSOP –40°C to 85°C
LT3650IMSE-8.4#PBF LT3650IMSE-8.4#TRPBF 365084 12-Lead Plastic MSOP –40°C to 85°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 LT C 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/
TOP VIEW
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
12
11
8
9
10
4
5
13
3
2
1
SW
BOOST
SENSE
BAT
NTC
RNG/SS
V
IN
CLP
SHDN
CHRG
FAULT
TIMER
6
7
T
JMAX
= 125°C, θ
JA
= 43°C/W, θ
JC
= 3°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
V
IN
CLP
SHDN
CHRG
FAULT
TIMER
12
11
10
9
8
7
SW
BOOST
SENSE
BAT
NTC
RNG/SS
TOP VIEW
13
MSE PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 43°C/W, θ
JC
= 3°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
pin conFiguraTion
SENSE-BAT ............................................... –0.5V to 0.5V
TIMER, RNG/SS, NTC ..............................................2.5V
Operating Junction Temperature Range
(Note 2) .................................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSE .................................................................. 300°C
LT3650-8.2/LT3650-8.4
3
36508284fd
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
LT3650
V
IN
V
IN
Operating Range
V
IN
Start Voltage
(Note 3)
l
l
9 32
11.5
V
V
V
IN(OVLO)
OVLO Threshold
OVLO Hysteresis
V
IN
Rising
l
32 35
1
40 V
V
V
IN(UVLO)
UVLO Threshold
UVLO Hysteresis
V
IN
Rising 8.7
0.2
V
V
V
BAT(F LT )
Battery Float Voltage LT3650-8.2
l
8.16
8.12
8.2 8.24
8.28
V
V
LT3650-8.4
l
8.36
8.32
8.4 8.44
8.48
V
V
∆V
RECHRG
Recharge Battery Threshold Threshold Voltage Relative to V
BAT(F LT )
–200 mV
V
BAT(PRE)
Battery Precondition Threshold Voltage LTC3650-8.2
LTC3650-8.4
5.65
5.80
V
V
V
BAT(PREHYST)
Battery Precondition Threshold
Hysteresis
90 mV
I
VIN
Operating Input Supply Current CC/CV Mode, Switch-On, I
SW
= 0
Standby Mode
Shutdown (SHDN = 0)
l
2.5
85
15
3.5 mA
µA
µA
I
BOOST
BOOST Supply Current Switch-On, I
SW
= 0
2.5V < V
(BOOST – SW)
< 8.5V
20
mA
I
BOOST
/I
SW
BOOST Switch Drive I
SW
= 2A 30 mA/A
V
SW(ON)
Switch-On Voltage Drop V
IN
– V
SW
, I
SW
= 2A 350 mV
I
SW(MAX)
Switch Current Limit
l
2.5 A
V
SENSE(PRE)
Precondition Current Sense Voltage V
SENSE
– V
BAT
V
BAT
= 5
15 mV
V
CLP(DC)
CLP Threshold Voltage V
CLP
– V
IN
; V
SENSE
– V
BAT
= 50mV
l
37.5 50 62.5 mV
I
CLP
CLP Input Bias Current 200 nA
V
SENSE(DC)
Maximum Current Sense Voltage V
SENSE
– V
BAT
; V
BAT
= 7.5V, V
RNG/SS
= 1.2V
l
95 100 105 mV
V
SENSE(C/10)
C/10 Trigger Sense Voltage
l
7.5 10 12.5 mV
I
BAT
BAT Input Bias Current Charging Terminated
l
0.1 1 µA
I
SENSE
SENSE Input Bias Current Charging Terminated
l
0.1 1 µA
V
NTC(H)
NTC Range Limit (High) V
NTC
Rising
l
1.25 1.36 1.45 V
V
NTC(L)
NTC Range Limit (Low) V
NTC
Falling
l
0.27 0.29 0.315 V
V
NTC(HYST)
NTC Threshold Hysteresis % of Threshold 20 %
R
NTC(DIS)
NTC Disable Impedance Minimum External Impedance to GND
l
250 500 kΩ
I
NTC
NTC Bias Current V
NTC
= 0.8V
l
47.5 50 52.5 µA
I
RNG/SS
I
RNG/SS
Bias Current
l
45 50 55 µA
V
RNG/SS
/V
SENSE
Current Limit Programming:
V
RNG/SS
/V
SENSE(MAX)
V
RNG/SS
= 0.5
l
8.5 10 11.5 V/V
V
SHDN
Shutdown Threshold Rising
l
1.17 1.20 1.23 V
V
SHDN(HYST)
Shutdown Hysteresis 120 mV
I
SHDN
SHDN Input Bias Current –10 nA
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at V
IN
= 20V, BOOST-SW = 4V, SHDN = 2V, SENSE = BAT = V
BAT(F LT )
, C
TIMER
= 0.68µF.
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LT3650EDD-8.2#PBF

Mfr. #:
Buy LT3650EDD-8.2#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management High Voltage 2 Amp Monolithic Li-Ion Battery Charger
Lifecycle:
New from this manufacturer.
Delivery:
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