Renesas ISL94208EVZ User Manual

ISL94208EVZ (Rev B)
Evaluation Board
Introduction
This document is intended for use by individuals engaged in
the development of hardware for a 4- to 6- series connected
Li-ion battery pack using the ISL94208EVZ board.
The evaluation kit provides full battery pack operation as well
as offering the ability to read and write the ISL94208 registers,
set thresholds and timer values, read cell voltages, control cell
balancing outputs, and control the power FETs.
The kit contains the following components:
• ISL94208EVZ board.
• ISL94208DB1EVZ cell balance daughter board.
• ISL94208DB2EVZ cell balance daughter board.
• GUI software for a PC running Windows XP.
• A power supply interface board for connecting a single
power source or a battery stack.
Operation of the ISL94208EVZ board requires the use of a
2
separate USB to I C kit, part number "ISLI2C-KIT".
An optional link between the PC and the microcontroller BKGD
connector is available from NXP (formerly Freescale) for
monitoring and debugging the microcontroller code.
First Steps
• If not already available, acquire the DeVaSys USB to I
interface cable and module. This is available from Intersil in
the ISLI2C-KIT.
• Download the software from the Intersil website on the
ISL94208 page. This is a zip file titled:
Software Release V2.10".
• Unzip the software files to a directory of your choice.
• Prior to powering the ISL94208 (Rev B) board, install the
2
USB to I C board software and connect the DeVaSys board
to the PC (see Appendix 1). However, do not connect the
DeVaSys board to the ISL94208EVZ board, yet. This is just
preparation of the test set up. With these pieces in place,
the PC interface can then quickly be used to monitor the
operation of the board, once power is applied.
• If changes to the microcontroller code are desired, then it
will be necessary to order a programming/debug module
from NXP (formerly Freescale), part number,
USBMULTILINKBDME. This kit also contains the Code
Warrior development tools. To get the source code, contact
Intersil and sign the license agreement. The
programming/debug module is needed if the board is going
to be calibrated. See "Installing The DeVaSys USB to I
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2
C
"ISL94208EVZ Kit
2
C
USER'S MANUAL
FIGURE 1. ISL94208EVZ KIT BOARDS
Board Software" on page 10. For this use, a License
agreement is not needed.
• Set up a power supply for the board. The power supply
should consist of a string of 4 to 6 batteries (see Figure 2), or
a string of 4 to 6 resistors and a power supply, or 4 to 6
individual power supplies (see Figures 2, 3).
To facilitate the power connections, the kit includes a
power supply board.
The kit operates without using either cell balance board,
however, if cell balancing is desired, then one of the two
daughter boards should be connected before powering the
board.
Battery/Power Supply
Connection
When connecting battery packs or power supplies, use the
recommended connections as shown in Figure 2. Make sure
that the individual power supply voltages do not exceed the
ISL94208 maximum input voltage differential of 5V per cell.
If using a string of resistors to emulate the battery cells, then
limit the power supply voltage, so that the resistor divider
outputs do not exceed the ISL94208 input maximum ratings.
It is recommended that, when using the resistor divider circuit
(see Figure 2), the series resistors to be 100 or less and 2W
minimum and balancing be disabled. Balancing should be
disabled, because when activating the ISL94208 cell balance
outputs, the current balance on the ISL94208 (Rev B) board
lowers the voltage across balanced power supply resistor,
while raising the voltage on all of the other series resistors.
Turning on multiple cell balance outputs could then result in
one or more of the VCELLN input voltages exceeding their
maximum specified limit.
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