LM5080 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – Modular Current Sharing Controller

NRND
LM5080
www.ti.com
SNVS387C – SEPTEMBER 2005 – REVISED MARCH 2013
LM5080 Modular Current Sharing Controller
Check for Samples: LM5080
FEATURES
1
•2 Average Program Current Share Method
• Single-wire Star Link Current Share Bus
• No Precision External Resistors Necessary
• 3V to 15V Bias Voltage Range
• Adaptable for High or Low Side Current
Sensing
• Flexible Architecture Allows 4 Modes of
Operation:
– Negative Remote Sense Adjustment
– Positive Remote Sense Adjustment
– Trim or Reference Adjustment
– Feedback Divider Adjustment
PACKAGES
• VSSOP-8
• RoHS compliant Pb free available
DESCRIPTION
The LM5080 is a simple and cost effective load share
controller that provides all functions required to
balance the currents delivered from multiple power
converters operated in parallel. The LM5080
implements an average program (AP) method of
active load share control which adjusts the output
voltage of individual power stages either up or down
to deliver nearly equal currents to a common load.
The average program method improves stability and
reduces the output voltage tolerance when compared
to other common load sharing methods. The LM5080
supports two common applications for load share
controllers: external control in which the load share
circuit balances currents between separate power
modules (bricks), and internal control where the load
share circuit is integrated into the voltage regulation
loop of each power converter module or circuit.
LM5080 Typical Application
Positive Supply Bus
Sense
Resistor
+SENSE
+Vo
Power Supply
- Vo
- SENSE
RSO
V_CC
GND
CSM _LM5080
CSP
SHR
.....
Sense
Resistor
Sharing Bus
+SENSE
+Vo
Power Supply
- Vo
- SENSE
RSO
V_CC
GND
CSM _LM5080
CSP
SHR
Ground Bus
Figure 1. Remote Sense Adjust Mode
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2
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