Datasheet Linear Technology LTC4020

Manufacturer	Linear Technology
Series	LTC4020

55V Buck-Boost Multi-Chemistry Battery Charger

Datasheets

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PDF, 425 Kb, Language: en, File uploaded: Sep 30, 2017, Pages: 42
55V Buck-Boost Multi-Chemistry Battery Charger

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Packaging

	LTC4020EUHF#PBF	LTC4020EUHF#TRPBF	LTC4020IUHF#PBF	LTC4020IUHF#TRPBF
N	1	2	3	4
Package	5x7 QFN-38 Package Outline Drawing	5x7 QFN-38 Package Outline Drawing	5x7 QFN-38 Package Outline Drawing	5x7 QFN-38 Package Outline Drawing
Package Code	UHF	UHF	UHF	UHF
Package Index	05-08-1701	05-08-1701	05-08-1701	05-08-1701
Pin Count	38	38	38	38

Parametrics

Parameters / Models	LTC4020EUHF#PBF	LTC4020EUHF#TRPBF	LTC4020IUHF#PBF	LTC4020IUHF#TRPBF
Battery Chemistry	Li-Ion, Li-Polymer, LiFePO4, Lead Acid	Li-Ion, Li-Polymer, LiFePO4, Lead Acid	Li-Ion, Li-Polymer, LiFePO4, Lead Acid	Li-Ion, Li-Polymer, LiFePO4, Lead Acid
Buck-Boost Output Current, A	Controller	Controller	Controller	Controller
Charge Termination	C/10, Timer	C/10, Timer	C/10, Timer	C/10, Timer
Demo Boards	DC2044A,DC2134A	DC2044A,DC2134A	DC2044A,DC2134A	DC2044A,DC2134A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Features	Maximum Power Point Control, NTC Input, PowerPath	Maximum Power Point Control, NTC Input, PowerPath	Maximum Power Point Control, NTC Input, PowerPath	Maximum Power Point Control, NTC Input, PowerPath
Float Voltage, V	Up to 55V	Up to 55V	Up to 55V	Up to 55V
Internal Pass Element	no	no	no	no
Max Charge Current, A	20	20	20	20
Number of Cells	Up to 55V Battery Voltage	Up to 55V Battery Voltage	Up to 55V Battery Voltage	Up to 55V Battery Voltage
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Type of Charger	Switching, Buck-Boost	Switching, Buck-Boost	Switching, Buck-Boost	Switching, Buck-Boost
Vin Max, V	55	55	55	55
Vin Min, V	4.5	4.5	4.5	4.5

Eco Plan

	LTC4020EUHF#PBF	LTC4020EUHF#TRPBF	LTC4020IUHF#PBF	LTC4020IUHF#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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55V High Efficiency Buck-Boost Power Manager and 55V High Efficiency Buck-Boost Power Manager and &mdash DN531
PDF, 165 Kb, File published: Aug 27, 2014
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55V High Efficiency Buck-Boost Power Manager and
Multi-Chemistry Battery Charger
Design Note 531
Charlie Zhao
Introduction
Today, battery chargers are expected to easily support
a variety of battery chemistries and accept a range of
voltage inputs, including wide-ranging solar panels. It is
increasingly common for input voltage ranges to span
above and below the output battery voltage, requiring
both step-down and step-up capability (buck-boost topology). The LTC4020 buck-boost power manager and
multi-chemistry battery-charging controller can take
wide-ranging 4.5V to 55V inputs and produce output
voltages up to 55V. Its buck-boost DC/DC controller
supports battery and system voltages above, below,
or equal to the input voltage. The charger is easily optimized for a variety of battery
chemistries. For instance, it can follow a constantcurrent/constant-voltage (CC/CV) charge algorithm,
with either C/10 or timed termination for lithium-based
battery systems, a constant-current (CC) characteristic
with timed termination, or an optimized 4-step, 3-stage
lead-acid charge profile.
6.3A Charger for 25.2V Battery Float Voltage
Figure 1 shows a 15V to 55V input, 25.2V/6.3A buckboost battery charger, featuring a high efficiency …

Articles

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Complete Single IC Power Management Battery Maintenance/Backup System for 48V Supplies &mdash LT Journal
PDF, 143 Kb, File published: Jul 25, 2014
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Complete Single IC Power Management Battery
Maintenance/Backup System for 48V Supplies
Jay Celani A common trend for electronic devices is increased portability; it is no longer
universally acceptable for a device to turn off simply because somebody вЂњpulled
the plug.вЂќ In order to implement portable functionality, devices must include
advanced power management systems that can control the path of power from
available sources to appropriate system outputs, keep a backup element charged
and ready, and ensure that a system has adequate power at all times.
Elegant, single-IC power management
solutions are readily available for many
portable devices, such as smart phones
or tablets, which operate at low voltages
and low power levels. Power management solutions for high power and high
voltage systems, such as those required
for many industrial or medical devices,
generally require cumbersome and
complex specialized discrete component
solutions. The LTC4020 simplifies power
management in these environments by
incorporating advanced power management functions into a high voltage
and high power single-IC solution.
The LTC4020 features an advanced
4-switch buck/boost DC/DC power converter, support for optimized battery …

Model Line

Series: LTC4020 (4)

LTC4020EUHF#PBF LTC4020EUHF#TRPBF LTC4020IUHF#PBF LTC4020IUHF#TRPBF

Manufacturer's Classification

Power Management > Battery Management > Battery Charger IC > Switching Battery Chargers | Buck/Boost Battery Chargers
Power Management > Energy Harvesting

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