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LTC4110EUHF#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P52
LTC4110
1
4110fb
Battery Backup
System Manager
FEATURES
APPLICATIONS
DESCRIPTION
The LTC
®
4110 is a complete single chip, high effi ciency,
fl yback battery charge and discharge manager with auto-
matic switchover between the input supply and the backup
battery or super capacitor. The IC provides four modes of
operation: battery backup, battery charge, battery calibra-
tion and shutdown. Battery backup and battery charge are
automatic standalone modes, while the optional calibration
mode requires a CPU host to communicate over an SMBus.
During calibration the fl yback charger is used in reverse
to discharge the battery with a programmable constant
current into the system load eliminating heat generation.
Three status outputs can be individually reconfi gured over
the SMBus to become GPIOs. User programmable over-
discharge protection is provided. The SHDN pin isolates
the battery to support shipping the product with a charged
battery installed.
Multiple LTC4110s can be combined to form a redundant
battery backup system or increase the number of battery
packs to achieve longer backup run times.
The LTC4110 is available in a low profi le (0.75mm), 38-pin
5mm × 7mm QFN package. The QFN features an exposed
metal die mount pad for optimum thermal performance.
n
Complete Backup Battery Manager for Li-Ion/
Polymer, Lead Acid, NiMH/NiCd Batteries and
Super Capacitors
n
Charge and Discharge Battery with Voltages Above
and Below the Input Supply Voltage
n
“No Heat” Battery Calibration Discharge Using
System Load
n
Automatic Battery Backup with Input Supply
Removal Using PowerPath™ Control
n
Standalone for Li-Ion/Polymer, SLA, and Supercaps
n
Optional SMBus/I
2
C Support Allows Battery
Capacity Calibration Operation with Host
n
Over- and Under-Battery Voltage Protection
n
Adjustable Battery Float Voltage
n
Precision Charge Voltage ±0.5%
n
Programmable Charge/Calibration Current Up to
3A with ±3% Accuracy
n
Optional Temperature Qualifi ed Charging
n
Wide Backup Battery Supply Range: 2.7V to 19V
n
Wide Input Supply Range: 4.5V to 19V
n
38-Lead (5mm × 7mm) QFN Package
n
Backup Battery Systems
n
Server Memory Backup
n
Medical Equipment
n
High Reliability Systems
Battery Backup System Manager Server Backup System (In Backup Mode)
TYPICAL APPLICATION
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
LTC4110
INID BATID
DCDIV
DCHFET
CHGFET
UVLO
SET POINT
BACKUP LOAD (DCOUT)
CURRENT FLOW
SYSTEM LOAD
BATTERY
DCIN
0V
ON ONOFF
4110 F01
4110 TA01b
LTC4110
BATTERY
BACKUP
SYSTEM
MANAGER
HOST CPU
BATTERY
SYSTEM LOAD
(DC/DC, ETC.)
I
2
C BUS
BACKUP LOAD
(MEMORY, ETC.)
CURRENT FLOW
LTC4110
2
4110fb
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
DCIN, BAT, DCOUT, DCDIV, SHDN
to GND ....................................................... –0.3V to 20V
Input Voltage (CLP, CLN) ...............–0.3V to DCIN + 0.3V
Input Voltage (CSP, CSN) ................–0.3V to BAT + 0.3V
Input Voltage
(GPIO1, GPIO2, GPIO3, SELC, SELA, TYPE, V
CHG
,
THA, THB, I
SENSE
, ACPDLY, SDA, SCL) .... –0.3V to 7V
Input Voltage (V
CAL
, V
DIS
) .......................–0.3V to 1.35V
Output Voltage
(ACPb, GPIO1, GPIO2, GPIO3) ................ –0.3V to 7V
CLP-CLN, CSP-CSN ..................................................±1V
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature (Note 3) ............................. 105°C
Storage Temperature Range
QFN Package ......................................–65°C to 125°C
(Note 1)
13 14 15 16
TOP VIEW
39
UHF PACKAGE
38-LEAD (5mm s 7mm) PLASTIC QFN
17 18 19
38 37 36 35 34 33 32
24
25
26
27
28
29
30
31
8
7
6
5
4
3
2
1DCIN
CLN
CLP
ACPDLY
DCDIV
SHDN
SDA
SCL
GPI01
GPI02
GPI03
SELA
BAT
SELC
I
SENSE
SGND
CSN
CSP
I
TH
I
CHG
I
CAL
I
PCC
THB
THA
INID
DCOUT
NC
BATID
V
DD
CHGFET
DCHFET
ACPb
V
DIS
V
CAL
V
CHG
V
REF
TIMER
TYPE
23
22
21
20
9
10
11
12
T
JMAX
= 100°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4110EUHF#PBF LTC4110EUHF#TRPBF 4110
38-Lead (5mm × 7mm) Plastic QFN
–40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4110EUHF LTC4110EUHF#TR 4110
38-Lead (5mm × 7mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
LTC4110
3
4110fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. Unless otherwise specifi ed, V
DCIN
= V
DCOUT
= V
DCDIV
= 12V, V
BAT
= 8.4V,
GND = SGND = CLP = CLN = SHDN = 0V and R
VREF
= 49.9k. All currents into device pins are positive and all currents out of device pins
are negative. All voltages are referenced to GND, unless otherwise specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Input
DCIN Operating Voltage Range Charge or Calibration Modes
l
4.5 19 V
DCOUT Operating Voltage Range Charge or Calibration Modes
l
4.5 19 V
Backup Mode
l
2.7 19 V
V
BAT
Operating Voltage Range Backup Mode
l
2.7 19 V
I
SPLY
Supply Current (I
DCIN
+ I
DCOUT
) in Idle Mode
(Note 4)
23 mA
I
BIDL
Battery Current in Idle Mode (Notes 4 and 5) 30 45 µA
I
BBU
Battery Current in Backup Mode (Note 5) V
DCIN
= 0 2 3 mA
I
BSD
Battery Current in Shutdown (Note 5) V
SHDN
= V
BAT
, V
DCIN
= 0 20 45 µA
V
UVI
Undervoltage Lockout Exit Threshold V
DCIN
Increasing
l
3.7 4 4.45 V
V
UVD
Undervoltage Lockout Entry Threshold V
DCIN
Decreasing
l
3.4 3.7 4.1 V
V
UVH
Undervoltage Lockout Hysteresis 400 mV
V
DD
Regulator
V
DD
Output Voltage No Load
l
4.5 4.75 5 V
V
DD(MIN)
Output Voltage I
DD
= –10mA
l
4.25 V
Charging Performance
V
FTOL
Charge Float Voltage Accuracy 4.20V for Li-Ion. 2.35V for Lead Acid (Note 8)
V
CHG
= GND
–5°C < T
A
< 85°C (Note10)
–40°C < T
A
< 85°C
l
–0.5
–0.8
–1
0.5
0.8
1
%
%
%
V
FATOL
Charge Float Voltage Adjust Accuracy 0.3V and –0.3V for Li-Ion Batteries,
0.15V and –0.15V for Lead Acid Batteries
(Note 8)
l
–2 2 %
I
BTOL
Bulk Charge Current Accuracy (Note 7) V
CSP
– V
CSN
=100mV
V
BAT
≥ 3.1V
–40°C < T
A
< 85°C
l
–3
–5
3
5
%
%
I
PTOL
Preconditioning and Wake-Up Current
Accuracy (Note 7)
V
BAT
≥ 3.3V (Note 8), V
CSP
– V
CSN
= 10mV;
Li-Ion and NiMH/NiCd Batteries Only
–30 30 %
V
BAT
≤ 3.3 (Note 8), V
CSP
– V
CSN
= 10mV;
Li-Ion and NiMH/NiCd Batteries Only
–40 40 %
I
SKVA
Voltage Error Amplifi er Sink Current at I
TH
Pin V
ITH
= 2V 96 µA
I
SRCA
Current Error Amplifi er Source Current at I
TH
Pin
V
ITH
= 2V –24 µA
I
SKCA
Current Error Amplifi er Sink Current at I
TH
Pin V
ITH
= 2V 24 µA
I
VCHG
V
CHG
Pin Bias Current V
CHG
= 1.25V –100 100 nA
V
BC
Bulk Charge Threshold Voltage;
V
BAT
Increasing (Note 8)
Li-Ion, V
CHG
= GND
NiMH/NiCd
2.80
0.84
3.00
0.90
3.20
0.96
V
V
V
BCH
Bulk Charge Threshold Voltage Hysteresis;
V
BAT
Decreasing (Note 8)
Li-Ion, V
CHG
= GND
NiMH/NiCd
85
40
mV
mV
V
AR
Auto Recharge Threshold Voltage;
V
BAT
Decreasing
Standard Li-Ion Only;
Specifi ed as Percentage of Float Voltage 93 95 97 %
V
ARH
Auto Recharge Threshold Hysteresis Voltage;
V
BAT
Increasing
Standard Li-Ion Only; Specifi ed as
Percentage of Float Voltage
2%
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P52

LTC4110EUHF#TRPBF

Mfr. #:
Buy LTC4110EUHF#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Bat Backup S Manager
Lifecycle:
New from this manufacturer.
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