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LTC3305IFE#TRPBF

Description
IC BATTERY BALANCER
Categorysemiconductor    Power management   
File Size522KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3305IFE#TRPBF Overview

IC BATTERY BALANCER

LTC3305IFE#TRPBF Parametric

Parameter NameAttribute value
Functionbattery balancer
battery chemistrylead acid
Number of batteries1 ~ 4
failsafe-
interface-
Operating temperature-40°C ~ 125°C (TJ)
Package/casing38-TFSOP (0.173", 4.40mm wide) exposed pad
Supplier device packaging38-TSSOP-EP
LTC3305
Lead-Acid Battery Balancer
FEATURES
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n
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DESCRIPTION
The
LTC
®
3305
balances up to 4 lead-acid batteries
connected in series. It is intended to be used in conjunction
with a separate pre-existing battery charger as part of a
high performance battery system. All voltage monitoring,
gate drive, and fault detection circuitry is integrated.
The LTC3305 employs an auxiliary battery or an alternative
storage cell to transfer charge to or from each individual
battery in the stack. A mode pin provides two operating
modes, timer mode and continuous mode. In timer mode,
once the balancing operation is completed, the LTC3305
goes into a low power state for a programmed time and then
periodically rebalances the batteries. In continuous mode,
the balancing operation continues even after the batteries
are balanced to their programmed termination voltage.
The LTC3305 is available in a thermally enhanced 38-lead
TSSOP package.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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Single IC Balances Up to Four 12V Lead-Acid
Batteries in Series
All NFET Design
Stackable to Balance Larger Series Battery Packs
Standalone Balancing Operation: Requires No
External μP or Additional Control Circuitry
Balancing Current Limited by External PTC Thermistor
Continuous Mode and Timer Mode
Programmable UV and OV Fault Thresholds
Programmable Termination Time and Termination
Voltage
Thermally Enhanced 38-Lead TSSOP Package
APPLICATIONS
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n
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Telecom Backup Systems
Home Battery Powered Backup Systems
Industrial Electric Vehicles
Energy Storage Systems (ESS)
Medical Equipment
TYPICAL APPLICATION
4-Battery Balancer with Programmed High and Low Battery Voltage Faults
10µF
25V
CHARGER
SUPPLY
I
CHARGE
BATTERY
STACK
CHARGER
1µF
6V
V
REG
CM
EN1
EN2
MODE
TERM1
TERM2
UVFLT
OVFLT
DONE
BAL
PTCFLT
BATX
BATY
CTON
CTOFF
CTBAT
V
L
27.4k
V
H
42.2k
I
SET
12.1k
GND
CP
249
BOOST
V4
10µF
25V
10µF
25V
V3
10µF
25V
1.33k
NGATE5
6.04k
Battery Voltages Converge
Over Time
16
14
NGATE4
6.04k
+
BAT4
100k EACH
NGATE3
3.01k
+
BATTERY VOLTAGE (V)
BAT3
12
10
8
6
4
2
0
TIME
3305 TA01a
10nF
100nF
LTC3305
V2
10µF
25V
V1
10µF
25V
9
NGATE7
PTC
AUXP
AUXN
10µF
25V
+
AUX
6.04k
NGATE8
3305 TA01
NGATE2
6.04k
+
BAT2
NGATE6
6.04k
10nF
NGATE1
6.04k
+
BAT1
NGATE1-9
BATTERY 1
BATTERY 2
BATTERY 3
BATTERY 4
6.04k
6.04k
NGATE9
3305fb
For more information
www.linear.com/LTC3305
1

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Description IC BATTERY BALANCER IC BATTERY BALANCER IC BATTERY BALANCER IC BATTERY BALANCER
Function battery balancer battery balancer battery balancer -
battery chemistry lead acid lead acid lead acid -
Number of batteries 1 ~ 4 1 ~ 4 1 ~ 4 -
Operating temperature -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -
Package/casing 38-TFSOP (0.173", 4.40mm wide) exposed pad 38-TFSOP (0.173", 4.40mm wide) exposed pad 38-TFSOP (0.173", 4.40mm wide) exposed pad -
Supplier device packaging 38-TSSOP-EP 38-TSSOP-EP 38-TSSOP-EP -
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