Sharing Bus

Positive Supply Bus

Ground Bus

. . . . .

Power Supply

CSP

CSM

SHR

RSO

Power Supply

LM5080

CSP

CSM

SHR

RSO

Sense

Resistor

+Vo

- Vo

+SENSE

- SENSE

+Vo

- Vo

+SENSE

- SENSE

LM5080

GND

GND

Sense

Resistor

NRND

LM5080

www.ti.com

SNVS387C – SEPTEMBER 2005 – REVISED MARCH 2013

LM5080 Modular Current Sharing Controller

Check for Samples: LM5080

1

FEATURES

DESCRIPTION

The LM5080 is a simple and cost effective load share

2

•

Average Program Current Share Method

controller that provides all functions required to

•

Single-wire Star Link Current Share Bus

balance the currents delivered from multiple power

•

No Precision External Resistors Necessary

converters

operated

in

parallel.

The

LM5080

implements an average program (AP) method of

•

3V to 15V Bias Voltage Range

active load share control which adjusts the output

•

Adaptable for High or Low Side Current

voltage of individual power stages either up or down

Sensing

to deliver nearly equal currents to a common load.

•

Flexible Architecture Allows 4 Modes of

The average program method improves stability and

Operation:

reduces the output voltage tolerance when compared

to other common load sharing methods. The LM5080

–

Negative Remote Sense Adjustment

supports two common applications for load share

–

Positive Remote Sense Adjustment

controllers: external control in which the load share

–

Trim or Reference Adjustment

circuit balances currents between separate power

modules (bricks), and internal control where the load

–

Feedback Divider Adjustment

share circuit is integrated into the voltage regulation

loop of each power converter module or circuit.

PACKAGES

•

VSSOP-8

•

RoHS compliant Pb free available

LM5080 Typical Application

Figure 1. Remote Sense Adjust Mode

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.