STEVAL-ISQ009V1 STMicroelectronics, STEVAL-ISQ009V1 Datasheet

BOARD EVAL LOAD SHARE FOR L6615

STEVAL-ISQ009V1

Manufacturer Part Number
STEVAL-ISQ009V1
Description
BOARD EVAL LOAD SHARE FOR L6615
Manufacturer
STMicroelectronics
Datasheet

Specifications of STEVAL-ISQ009V1

Main Purpose
Power Management, ORing Controller / Load Share
Embedded
No
Utilized Ic / Part
L6615
Primary Attributes
3 Paralleled DC-DC converter modules
Secondary Attributes
5VDC supply delivers 3.3V/5A
Product
Power Management Modules
Lead Free Status / RoHS Status
Lead free by exemption / RoHS compliant by exemption
Other names
497-10171

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
STEVAL-ISQ009V1
Manufacturer:
STMicroelectronics
Quantity:
1
Features
Description
The STEVAL-ISQ009V1 demonstration board is
composed of three identical sections
(daughterboards) and a motherboard.
Each daughterboard is capable of performing DC-
DC conversion starting from +5 VDC and is
designed to deliver 3.3 V / 5 A to the load.
The input terminals of the motherboard are
connected to a +5 VDC external source and the
output terminals to the load. The board can
accommodate up to three DC-DC converters.
The motherboard contains the circuitry necessary
to perform current sharing (utilizing the L6615)
and to isolate a failed section from the load. It is
designed to be adaptable to all power supplies
(compatible with the L6615 absolute maximum
ratings) having remote sense pins. By changing
just a few components, it can be modified for new
specifications.
It is possible to build a system to supply a 10 A
load at +3.3 V in a 2+1 redundant configuration.
That is, whenever three sections are running,
each of them supplies 3.33 A, a value lower than
its nominal capability.
If one of them is switched off, the system is able to
supply the load, and each section carries 5 A.
DC-DC conversion management is performed by
the L6910.
February 2010
For further information contact your local STMicroelectronics sales office.
Three paralleled DC-DC converter modules (in
synchronous buck topology, managed by ST’s
L6910)
Output currents shared through ST current
sharing controller L6615
Innovative use of a MOSFET as both the OR-
ing element (replacing OR-ing diode) and
sensing element (R
RoHS compliant
Load share controller demonstration board based on the L6615
DS(on)
)
Doc ID 17166 Rev 1
It is possible to verify that disabling one section
(through the relevant switch on the motherboard)
does not cause overvoltage on the output or
overcurrent in other sections. In the same way,
enabling one section (with the other two already
running) does not cause negative output voltage
drop or a short to ground, and current sharing is
established.
STEVAL-ISQ009V1
STEVAL-ISQ009V1
www.st.com
Data brief
1/5
5

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STEVAL-ISQ009V1 Summary of contents

Page 1

... OR-ing diode) and sensing element (R ) DS(on) ■ RoHS compliant Description The STEVAL-ISQ009V1 demonstration board is composed of three identical sections (daughterboards) and a motherboard. Each daughterboard is capable of performing DC- DC conversion starting from +5 VDC and is designed to deliver 3 the load. The input terminals of the motherboard are connected VDC external source and the output terminals to the load ...

Page 2

... Schematic diagrams 1 Schematic diagrams Figure 1. Single daughterboard circuit schematic 2/5 Doc ID 17166 Rev 1 STEVAL-ISQ009V1 ISQ009v1_schematic_1 ...

Page 3

... STEVAL-ISQ009V1 Figure 2. Motherboard circuit schematic Doc ID 17166 Rev 1 Schematic diagrams 3/5 ...

Page 4

... Revision history 2 Revision history Table 1. Document revision history Date 22-Feb-2010 4/5 Revision 1 Initial release. Doc ID 17166 Rev 1 STEVAL-ISQ009V1 Changes ...

Page 5

... STEVAL-ISQ009V1 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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