Datasheet Linear Technology LTC3305

Manufacturer	Linear Technology
Series	LTC3305

Lead Acid Battery Balancer

Datasheets

PDF, 543 Kb, Revision: B, File uploaded: Oct 23, 2017

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Packaging

	LTC3305EFE#PBF	LTC3305EFE#TRPBF	LTC3305IFE#PBF	LTC3305IFE#TRPBF
N	1	2	3	4
Package	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing	TSSOP-38 Package Outline Drawing
Package Code	FE	FE	FE	FE
Package Index	05-08-1772	05-08-1772	05-08-1772	05-08-1772
Pin Count	38	38	38	38

Parametrics

Parameters / Models	LTC3305EFE#PBF	LTC3305EFE#TRPBF	LTC3305IFE#PBF	LTC3305IFE#TRPBF
Bidirectional	Uni-directional	Uni-directional	Uni-directional	Uni-directional
Demo Boards	DC2043B	DC2043B	DC2043B	DC2043B
Export Control	no	no	no	no
I/O	Stand Alone	Stand Alone	Stand Alone	Stand Alone
Max Charge Current, A	10	10	10	10
Number of Cells	Four 12V Lead Acid	Four 12V Lead Acid	Four 12V Lead Acid	Four 12V Lead Acid
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Vin Range	Up to 64V	Up to 64V	Up to 64V	Up to 64V

Eco Plan

	LTC3305EFE#PBF	LTC3305EFE#TRPBF	LTC3305IFE#PBF	LTC3305IFE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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Determine Balancing Current for the LTC3305 Lead-Acid Battery Balancer &mdash DN539
PDF, 182 Kb, File published: Apr 14, 2015
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Determine Balancing Current for the LTC3305 Lead-Acid
Battery Balancer
Design Note 539
Jim Drew
Introduction
The LTC В®3305 is a lead-acid battery balancer that uses
an auxiliary battery or an alternative storage cell (AUX)
to transfer charge to and from individual batteries within
a series-connected stack. The balancer controls external
NMOS switches to sequentially connect the auxiliary
battery to each battery in the stack. To prevent damage
to the NMOS switches and their interconnecting PCB
traces, a current limiting device is required. One such
device is a ceramic positive temperature coefficient
(PTC) thermistor.
The PTC thermistor limits the peak current in the
connection between the AUX cell and the battery. For
relatively small differential voltages (VDIFF ) between
the AUX cell and the battery that is connected, the
current through the PTC remains low, as does its
temperature, and the PTC exhibits the characteristics
of a constant value resistor. As VDIFF increases, current
increases, and the temperature of the PTC rises. When …

Model Line

Series: LTC3305 (4)

LTC3305EFE#PBF LTC3305EFE#TRPBF LTC3305IFE#PBF LTC3305IFE#TRPBF

Manufacturer's Classification

Power Management > Battery Management > Battery Cell Balancers

Slices

Microcontrollers