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LT3652HVEMSE#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
LT3652HV
1
3652hvfb
For more information www.linear.com/LT3652HV
TYPICAL APPLICATION
DESCRIPTION
Power Tracking 2A Battery
Charger
The LT
®
3652HV is a complete monolithic step-down bat-
tery charger that operates over a 4.95V to 34V input range.
The LT3652HV provides a constant-current/constant-voltage
charge characteristic, with maximum charge current
externally programmable up to 2A. The charger employs
a 3.3V float voltage feedback reference, so any desired
battery float voltage up to 18V can be programmed with a
resistor divider.
The LT3652HV employs an input voltage regulation loop,
which reduces charge current if the input voltage falls below
a programmed level, set with a resistor divider. When the
LT3652HV is powered by a solar panel, the input regulation
loop is used to maintain the panel at peak output power.
The LT3652HV can be configured to terminate charging when
charge current falls below 1/10 of the programmed maximum
(C/10). Once charging is terminated, the LT3652HV enters a
low-current (85µA) standby mode. An auto-recharge feature
starts a new charging cycle if the battery voltage falls 2.5%
below the programmed float voltage. The LT3652HV also
contains a programmable safety timer, used to terminate
charging after a desired time is reached. This allows top-off
charging at currents less than C/10.
FEATURES
APPLICATIONS
n
Input Supply Voltage Regulation Loop for Peak
Power Tracking in (MPPT) Solar Applications
n
Wide Input Voltage Range: 4.95V to 34V (40V Abs Max)
n
Programmable Charge Rate Up to 2A
n
User Selectable Termination: C/10 or On-Board
Termination Timer
n
Resistor Programmable Float Voltage Up to 18V
Accommodates 4-Cell Li-Ion/Polymer, 5-Cell
LiFePO
4
, Lead-Acid Chemistries
n
Parallelable for Higher Output Current
n
1MHz Fixed Frequency
n
0.5% Float Voltage Reference Accuracy
n
5% Charge Current Accuracy
n
2.5% C/10 Detection Accuracy
n
Binary-Coded Open-Collector Status Pins
n
Thermally Enhanced 3mm × 3mm DFN and MSE
Packages
n
Solar Powered Applications
n
Remote Monitoring Stations
n
Portable Handheld Instruments
n
12V to 24V Automotive Systems
n
Battery Charging from Current Limited Adapter
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.
V
IN_REG
Loop Servos Maximum Charge Current to Prevent AC Adapter Output from
Drooping Lower Than 24V 5-Cell LiFePO
4
Charger (18V at 1.5A) with C/10 Termination
Powered by Inexpensive 24VDC/1A Unregulated Wall Adapter.
SW
V
IN
AC ADAPTER
INPUT
24VDC AT 1A
V
IN_REG
V
FB
BOOST
SENSE
BAT
NTC
TIMER
1µF
10V
1N4148
127k
3652 TA01a
R1
10K
B = 3380
10µF
20µH
10µF
5-CELL LiFePO
4
PACK
(18V FLOAT)
SYSTEM
LOAD
+
LT3652HV
44.2k
750k
MBRS340
D3
MBRS340
51.1k
SHDN
CHRG
FAULT
150k
665k
0.068
ADAPTER OUTPUT CURRENT (A)
0 0.2
ADAPTER OUTPUT VOLTAGE (V)
12
15
18
33
30
27
24
21
0.6
1
1.2
3652 TA01b
36
0.4
0.8
1.61.4
21.8
1A/24VDC Unregulated Adapter
I vs V Characteristic
LT3652HV
2
3652hvfb
For more information www.linear.com/LT3652HV
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Voltages:
V
IN
........................................................................40V
V
IN_REG
, SHDN, CHRG, FAULT ............ V
IN
+ 0.5V, 40V
SW ........................................................................ 40V
SW-V
IN
.................................................................4.5V
BOOST ...................................................SW+10V, 50V
BAT, SENSE ...........................................................20V
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3652HVEDD#PBF LT3652HVEDD#TRPBF LFRG 12-Lead Plastic DFN 3mm × 3mm –40°C to 125°C
LT3652HVIDD#PBF LT3652HVIDD#TRPBF LFRG 12-Lead Plastic DFN 3mm × 3mm –40°C to 125°C
LT3652HVEMSE#PBF LT3652HVEMSE#TRPBF 3652HV 12-Lead Plastic MSOP –40°C to 125°C
LT3652HVIMSE#PBF LT3652HVIMSE#TRPBF 3652HV 12-Lead Plastic MSOP –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.
TOP VIEW
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
12
11
8
9
10
4
5
3
2
1
SW
BOOST
SENSE
BAT
NTC
V
FB
V
IN
V
IN_REG
SHDN
CHRG
FAULT
TIMER
6
7
13
GND
1
2
3
4
5
6
V
IN
V
IN_REG
SHDN
CHRG
FAULT
TIMER
12
11
10
9
8
7
SW
BOOST
SENSE
BAT
NTC
V
FB
TOP VIEW
13
GND
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
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
BAT-SENSE ......................................... –0.5V to +0.5V
NTC, TIMER, ........................................................2.5V
V
FB
..........................................................................5V
Operating Junction Temperature Range
(Note 2) ............................................. –40°C to 125°C
Storage Temperature Range ................... –65°C to 150°C
LT3652HV
3
3652hvfb
For more information www.linear.com/LT3652HV
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
V
IN
Operating Range
V
IN
Start Voltage
V
BAT
= 4.2 (Notes 3, 4)
V
BAT
= 4.2 (Note 4)
l
l
4.95
7.5
34 V
V
V
IN(OVLO)
OVLO Threshold
OVLO Hysteresis
V
IN
Rising
l
34 35
1
40 V
V
V
IN(UVLO)
UVLO Threshold
UVLO Hysteresis
V
IN
Rising 4.6
0.2
4.95 V
V
V
FB(FLT)
Float Voltage Reference (Note 6)
l
3.282
3.26
3.3 3.318
3.34
V
V
ΔV
RECHARGE
Recharge Reference Threshold Voltage Relative to V
FB(FLT)
(Note 6) 82.5 mV
V
FB(PRE)
Reference Precondition Threshold V
FB
Rising (Note 6) 2.3 V
V
FB(PREHYST)
Reference Precondition Threshold
Hysteresis
Voltage Relative to V
FB(PRE)
(Note 6) 70 mV
V
IN_REG(TH)
Input Regulation Reference V
FB
= 3V; V
SENSE
– V
BAT
= 50mV
l
2.65 2.7 2.75 V
I
IN_REG
Input Regulation Reference Bias Current V
IN_REG
= V
IN_REG(TH)
l
35 100 nA
I
VIN
Operating Input Supply Current CC/CV Mode, 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,
2.5 < V
(BOOST – SW)
< 8.5
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 3 A
V
SENSE(PRE)
Precondition Sense Voltage V
SENSE
– V
BAT
; V
FB
= 2V 15 mV
V
SENSE(DC)
Maximum Sense Voltage V
SENSE
– V
BAT
; V
FB
= 3V (Note 7)
l
95 100 105 mV
V
SENSE(C/10)
C/10 Trigger Sense Voltage V
SENSE
– V
BAT
, Falling
l
7.5 10 12.5 mV
I
BAT
BAT Input Bias Current Charging Terminated 0.1 1 µA
I
SENSE
SENSE Input Bias Current Charging Terminated 0.1 1 µA
I
VFB
V
FB
Input Bias Current Charging Terminated 65 nA
I
VFB
V
FB
Input Bias Current CV Operation (Note 5) 110 nA
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 Impedance to ground
l
250 500 kΩ
I
NTC
NTC Bias Current V
NTC
= 0.8V
l
47.5 50 52.5 µA
V
SHDN
Shutdown Threshold Rising
l
1.15 1.2 1.25 V
V
SHDN(HYST)
Shutdown Hysteresis 120 mV
I
SHDN
SHDN Input Bias Current –10 nA
V
CHRG
, V
FAULT
Status Low Voltage 10mA Load
l
0.4 V
I
TIMER
Charge/Discharge Current 25 µA
V
TIMER(DIS)
Timer Disable Threshold
l
0.1 0.25 V
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, Boost – SW = 4V, SHDN = 2V, V
FB
= 3.3V, C
TIMER
= 0.68µF.
ELECTRICAL CHARACTERISTICS
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LT3652HVEMSE#TRPBF

Mfr. #:
Buy LT3652HVEMSE#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Pwr Track 2A Bat Chr
Lifecycle:
New from this manufacturer.
Delivery:
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