©2021 Advanced Linear Devices, Inc., Vers. 1.1

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GENERAL DESCRIPTION

The SABMB2 is a 2-channel Printed Circuit Board (PCB) designed

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 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.

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).

2-CHANNEL SUPERCAPACITOR AUTO BALANCING PCB

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

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

SABMB2/SABMB2XX

* Magnified, not to scale

MECHANICAL DRAWING

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600 mil

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SABMB2

Part Number

Description

SABMB2

Blank Universal PCB ready for one

ALD9100xx Dual SAB MOSFET

SABMB2XX

Example:

SABMB225

SABMB2 Board with one

ALD9100XXSALI

SABMB2 Board with one

ALD910025SALI

Note: SABMB2XX is optional with a specific

ALD9100XXSALI unit installed. XX = 16, 17, 18, 19, 20,

21, 22, 23, 24, 25, 26, 27, 28, 29, 30.

See page 4 for full listing of part numbers.

ORDERING INFORMATION