Datasheet > LTC3351

LTC3351

更新时间： 2022-06-24 15:43:37

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
26页	965K
描述
2.5A Supercapacitor Backup Power Manager

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LTC3351 数据手册

LTC4041

2.5A Supercapacitor

Backup Power Manager

FEATURES

DESCRIPTION

The LTC^®4041 is a complete supercapacitor backup sys-

tem for 2.9V to 5.5V supply rails. It contains a high cur-

rent step-down DC/DC converter to charge a single super-

capacitor or two supercapacitors in series. When input

power is unavailable, the step-down regulator operates

in reverse as a step-up regulator to backup the system

output from the supercapacitor(s).

2.5A Step-Down Supercapacitor Charger and 2.5A

Step-Up Backup Supply

6.5A Switches for 2.5A Backup from One

Supercapacitor or Two in Series

Input Current Limit Prioritizes Load over

Charge Current

Input Disconnect Switch Isolates Input During Backup

Automatic Seamless Switch-Over to Backup Mode

The LTC4041’s adjustable input current limit function

reduces charge current to protect the input supply from

overload while an external disconnect switch isolates the

input supply during backup. When the input supply drops

below the adjustable PFI threshold, the 2.5A boost regula-

tor delivers power from the supercapacitor to the system

output.

Internal Supercapacitor Balancer (No External

Resistors)

Programmable Charge Current and Charge Voltage

Input Power Fail Indicator

System Power Good Indicator

Optional OVP Circuitry Protects Device to >60V

Constant Frequency Operation

Thermally Enhanced 24-Lead 4mm × 5mm

QFN Package

An optional input overvoltage protection (OVP) circuit

protects the LTC4041 from high voltage damage at the V_IN

pin. An internal supercapacitor balancing circuit maintains

equal voltages across each supercapacitor and limits the

maximum voltage of each supercapacitor to a pre-deter-

mined value. The LTC4041 is available in a low profile

(0.75mm) 24-Lead 4mm × 5mm QFN package.

APPLICATIONS

Ride-Through “Dying Gasp” Supplies

High Current Ride-Through 3V to 5V UPS

Power Meters/Industrial Alarms

Servers/Solid State Drives

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. Patents, including 6522118, 6570372, 6700364, 8139329.

TYPICAL APPLICATION

Single Supercapacitor 3.3V Backup Application

Complete Backup Event with

a Single 10F Supercapacitor

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Rev A

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