ISL9208EVAL2Z Intersil, ISL9208EVAL2Z Datasheet - Page 15

• Manufacturer Part Number: ISL9208EVAL2Z
• Description: EVAL BOARD 2 FOR ISL9208
• Manufacturer: Intersil

Specifications of ISL9208EVAL2Z

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

IF THE AO VOLTAGES ARE READING INCORRECTLY
ON THE GU
Other Questions
Forward any ISL9208EVAL2Z questions to the Intersil
Application Engineer at [e-mail]
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to
verify that the Application Note or Technical Brief is current before proceeding.
1. Check that the RGO output is 3.3V. GUI and
2. Power-down the board and stop the GUI. Power-up the
3. Turn off the cell balancing. On the ISL9208EVAL2Z
microcontroller calculations assume the RGO voltage is
3.3V. Any variation translates directly into errors in the
GUI screen value.
board and restart the GUI. This should clear any
communication problems.
board, external PNP transistors are used to provide
external balancing elements. When the PNP transistor
turns on, current flows into the CBN pin and out the
VCELL(N-1) pin. The current flowing out the VCELL(N-1)
pin causes the VCELL voltage on one side of the
balanced input to go up and the other side to go down.
This difference can be up to 200mV to 300mV. This is an
inherent design deficiency. An alternative is to replace the
PNP transistors with P-Channel FETs or reduce the value
of the series resistors on the inputs. However, these
changes introduce some reliability concerns during a
pack “dead short circuit”. A future revision of the board is
planned that will address these issues.
For information regarding Intersil Corporation and its products, see www.intersil.com
15
Application Note 1444
December 15, 2008
AN1444.0