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LTC4000EGN#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P40
LTC4000
1
4000fb
For more information www.linear.com/LTC4000
Charge Current and V
OUT
Profile
vs V
BAT
During a Charge Cycle
Typical applicaTion
FeaTures DescripTion
High Voltage High Current
Controller for Battery Charging
and Power Management
The LTC
®
4000 is a high voltage, high performance controller
that converts many externally compensated DC/DC power
supplies into full-featured battery chargers.
Features of the LTC4000’s battery charger include: accurate
(±0.25%) programmable float voltage, selectable timer or
current termination, temperature qualified charging using
an NTC thermistor, automatic recharge, C/10 trickle charge
for deeply discharged cells, bad battery detection and
status indicator outputs. The battery charger also includes
precision current sensing that allows lower sense voltages
for high current applications.
The LTC4000 supports intelligent PowerPath control. An
external PFET provides low loss reverse current protec-
tion. Another external PFET provides low loss charging
or discharging of the battery. This second PFET also
facilitates an instant-on feature that provides immediate
downstream system power even when connected to a
heavily discharged or short faulted battery.
The LTC4000 is available in a low profile 28-lead 4mm ×
5mm QFN and SSOP packages.
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.
48V to 10.8V at 10A Buck Converter Charger for Three LiFePO
4
Cells
applicaTions
n
Complete High Performance Battery Charger When
Paired with a DC/DC Converter
n
Wide Input and Output Voltage Range: 3V to 60V
n
Input Ideal Diode for Low Loss Reverse Blocking
and Load Sharing
n
Output Ideal Diode for Low Loss PowerPath™ and
Load Sharing with the Battery
n
Instant-On Operation with Heavily Discharged
Battery
n
Programmable Input and Charge Current:
±1% Accuracy
n
±0.25% Accurate Programmable Float Voltage
n
Programmable C/X or Timer Based Charge
Termination
n
NTC Input for Temperature Qualified Charging
n
28-Lead 4mm × 5mm QFN or SSOP Packages
n
High Power Battery Charger Systems
n
High Performance Portable Instruments
n
Industrial Battery Equipped Devices
n
Notebook/Subnotebook Computers
1.13M
14.7k
127k
10k
10k
3-CELL LiFePO
4
BATTERY PACK
V
BAT
10.8V FLOAT
10A MAX CHARGE
CURRENT
NTHS0603
N02N1002J
1.15M
47nF
5mΩ
V
OUT
12V, 15A
15V TO 60V
Si7135DP
133k
CSN
CSP
BGATE
IGATE
BAT
OFB
FBG
BFB
NTC
CX
LTC4000
ITH CC IID
5mΩ
LT3845A
100µF
OUT
V
C
SHDN
IN
RST
CLN
IN
ENC
CHRG
F LT
VM
IIMON
IBMON
22.1k
TMR GND BIASCL
24.9k
1µF
3.0V
1.10M
100k
10nF
10nF
1µF0.1µF
4000 TA01a
Si7135DP
V
BAT
(V)
6
0
I
CHARGE
(A)
V
OUT
(V)
2
4
8
6
10
12
8
8.5
9
10
9.5
10.5
11
10 11
4000 TA01b
127 8 9
V
OUT
I
CHARGE
V
OUT
I
CHARGE
LTC4000
2
4000fb
For more information www.linear.com/LTC4000
absoluTe MaxiMuM raTings
IN, CLN, IID, CSP, CSN, BAT ....................... –0.3V to 62V
IN-CLN, CSP-CSN ............................................–1V to 1V
OFB, BFB, FBG ........................................... –0.3V to 62V
FBG ............................................................–1mA to 2mA
IGATE ...........Max (V
IID
, V
CSP
) – 10V to Max (V
IID
, V
CSP
)
BGATE ....... Max (V
BAT
, V
CSN
) – 10V to Max (V
BAT
, V
CSN
)
ENC, CX, NTC, VM ...................................–0.3V to V
BIAS
IL, CL, TMR, IIMON, CC ...........................–0.3V to V
BIAS
BIAS .............................................–0.3V to Min (6V, V
IN
)
IBMON ..................................–0.3V to Min (V
BIAS
, V
CSP
)
ITH ............................................................... –0.3V to 6V
CHRG, FLT, RST .......................................... –0.3V to 62V
CHRG, FLT, RST ..........................................–1mA to 2mA
Operating Junction Temperature Range
(Note 2) ................................................................. 125°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
9 10
TOP VIEW
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
11 12 13
28
29
GND
27 26 25 24
14
23
6
5
4
3
2
1
VM
RST
IIMON
IL
ENC
IBMON
CX
CL
IGATE
OFB
CSP
CSN
BGATE
BAT
BFB
FBG
GND
IN
CLN
CC
ITH
IID
TMR
GND
F LT
CHRG
BIAS
NTC
7
17
18
19
20
21
22
16
8
15
T
JMAX
= 125°C, θ
JA
= 43°C/W, θ
JC
= 4°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
GN PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ENC
IBMON
CX
CL
TMR
GND
F LT
CHRG
BIAS
NTC
FBG
BFB
BAT
BGATE
IL
IIMON
RST
VM
GND
IN
CLN
CC
ITH
IID
IGATE
OFB
CSP
CSN
T
JMAX
= 125°C, θ
JA
= 80°C/W, θ
JC
= 25°C/W
pin conFiguraTion
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4000EUFD#PBF LTC4000EUFD#TRPBF 4000
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC4000IUFD#PBF LTC4000IUFD#TRPBF 4000
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC4000EGN#PBF LTC4000EGN#TRPBF LTC4000GN 28-Lead Plastic SSOP –40°C to 125°C
LTC4000IGN#PBF LTC4000IGN#TRPBF LTC4000GN 28-Lead Plastic SSOP –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/
LTC4000
3
4000fb
For more information www.linear.com/LTC4000
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= V
CLN
= 3V to 60V unless otherwise noted (Notes 2, 3).
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Supply Operating Range
l
3 60 V
I
IN
Input Quiescent Operating Current 0.4 mA
I
BAT
Battery Pin Operating Current V
IN
≥ 3V, V
CSN
= V
CSP
≥ V
BAT
l
50 100 µA
Battery Only Quiescent Current V
IN
= 0V, V
CSN
= V
CSP
≤ V
BAT
l
10 20 μA
Shutdown
ENC Input Voltage Low
l
0.4 V
ENC Input Voltage High
l
1.5 V
ENC Pull-Up Current V
ENC
= 0V –4 –2 –0.5 µA
ENC Open Circuit Voltage V
ENC
= Open
l
1.5 2.5 V
Voltage Regulation
V
BFB_REG
Battery Feedback Voltage
l
1.133
1.120
1.136
1.136
1.139
1.147
V
V
BFB Input Current V
BFB
= 1.2V ± 0.1 µA
V
OFB_REG
Output Feedback Voltage
l
1.176 1.193 1.204 V
OFB Input Current V
OFB
= 1.2V ± 0.1 µA
R
FBG
Ground Return Feedback Resistance
l
100 400 Ω
V
RECHRG(RISE)
Rising Recharge Battery Threshold Voltage % of V
BFB_REG
l
96.9 97.6 98.3 %
V
RECHRG(HYS)
Recharge Battery Threshold Voltage Hysteresis % of V
BFB_REG
0.5 %
V
OUT(INST_ON)
Instant-On Battery Voltage Threshold % of V
BFB_REG
l
82 86 90 %
V
LOBAT
Falling Low Battery Threshold Voltage % of V
BFB_REG
l
65 68 71 %
V
LOBAT(HYS)
Low Battery Threshold Voltage Hysteresis % of V
BFB_REG
3 %
Current Regulation
Ratio of Monitored-Current Voltage to Sense
Voltage
V
IN,CLN
≤ 50mV, V
IIMON
/V
IN,CLN
V
CSP,CSN
≤ 50mV, V
IBMON
/V
CSP,CSN
l
18.5 20 21 V/V
V
OS
Sense Voltage Offset V
CSP,CSN
≤ 50mV, V
CSP
= 60V or
V
IN,CLN
≤ 50mV, V
IN
= 60V (Note 4)
–300
300
µV
CLN, CSP, CSN Common Mode Range (Note 4)
l
3 60 V
CLN Pin Current ±1 µA
CSP Pin Current V
IGATE
= Open, V
IID
= 0V 90 μA
CSN Pin Current V
BGATE
= Open, V
BAT
= 0V 45 μA
I
IL
Pull-Up Current for the Input Current Limit
Programming Pin
l
–55 –50 –45 μA
I
CL
Pull-Up Current for the Charge Current Limit
Programming Pin
l
–55 –50 –45 μA
I
CL_TRKL
Pull-Up Current for the Charge Current Limit
Programming Pin in Trickle Charge Mode
V
BFB
< V
LOBAT
l
–5.5 –5.0 –4.5 μA
Input Current Monitor Resistance to GND 40 90 140 kΩ
Charge Current Monitor Resistance to GND 40 90 140 kΩ
A4, A5 Error Amp Offset for the Current Loops
(See Figure 1)
V
CL
= 0.8V, V
IL
= 0.8V
l
–10 0 10 mV
Maximum Programmable Current Limit
Voltage Range
l
0.985 1.0 1.015 V
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LTC4000EGN#PBF

Mfr. #:
Buy LTC4000EGN#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management High Voltage, High Current Controller for Battery Charging and Power Management
Lifecycle:
New from this manufacturer.
Delivery:
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