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ADVANCED
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DEVICES, INC.
SABMB2/SABMB2XX
2-CHANNEL SUPERCAPACITOR AUTO BALANCING PCB
GENERAL DESCRIPTION
The SABMB2 is a 2-channel Printed Circuit Board (PCB) designed
to be used with any member of the ALD9100XX family of SAB™
MOSFETs for system designers and application developers. SAB
The SABMB2 is a blank PCB, ready for an ALD9100XX to be
installed. For example, the SABMB225 is an SABMB2 board with
an ALD910025SALI installed and tested. These are rated for
industrial tempurature of -40°C to +85°C.
®
MOSFETs are exclusive EPAD MOSFETs that address leakage
and voltage balance of supercapacitor cells connected in series.
Imbalance of leakage currents, although much smaller in
magnitude than charging or discharging currents, need to be
balanced, as leakage currents are long-term DC values that
integrate and accumulate over time. SAB MOSFETs and the
SABMB2 boards are compact, economical and effective in
balancing any size supercapacitors with little or no additional power
dissipation. Each SABMB2 can balance two supercapacitors in a
series stack. It is the newest board to join the popular SABMB16,
which can balance two to four supercapacitors in a series stack.
These boards can be cascaded to balance multiple series stacks
of two supercapacitors each.
The SABMB2 board includes the following features for flexibility
in a variety of different applications:
1) One ALD9100XX Dual SAB MOSFET unit installed per
board.
2) Optional reverse biased external clamping power diodes
(schottky rectifiers) can be installed, on board where
necessary, across each SAB MOSFET.
3) Multiple SABMB2 PCBs can be cascaded to form a series
chain, paralleling a series-connected chain of
supercapacitor cells.
4) Compact size of 0.6 in. by 1.0 in. with mounting holes
5) Rated for RoHS compatible/industrial temperature range
of -40°C to +85°C
The SABMB2 is a simple, out-of-the-box plug-and-play PCB
solution for development, prototyping, demonstration and
evaluation, or production deployment. It is suited for balancing
supercapacitor stacks ranging from two in series to hundreds in
series, and for supercapacitors of 0.1F to 3000F and beyond. The
average additional power dissipation due to use of SABMB boards
is zero, which makes this method of supercapacitor balancing
very energy efficient. It is especially suited for low loss energy
harvesting and long life battery operated applications.
MECHANICAL DRAWING
Supercapacitors, also known as ultracapacitors, when connected
two cells in series can be balanced with a single ALD9100XX
package installed. Supercapacitors, when connected more than
two cells in series, can be balanced with more than one SABMBXX
board (each with ALD9100XX packages installed).
V+
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SABMB2
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ORDERING INFORMATION
1000 mil
B
B
C
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Part Number
Description
Blank Universal PCB ready for one
ALD9100xx Dual SAB MOSFET
SABMB2
SABMB2XX
SABMB2 Board with one
ALD9100XXSALI
U1
V-
Example:
SABMB225
SABMB2 Board with one
ALD910025SALI
600 mil
Note: SABMB2XX is optional with a specific
ALD9100XXSALI unit installed. XX = 16, 17, 18, 19, 20,
21, 22, 23, 24, 25, 26, 27, 28.
* Magnified, not to scale
See page 4 for full listing of part numbers.
©2018 Advanced Linear Devices, Inc., Vers. 1.0
www.aldinc.com
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