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The bq77908A circuit module may be damaged by overtemperature. To avoid
damage, monitor the temperature during evaluation, and provide cooling as
needed for your system environment.
The bq77908A circuit module may become hot during operation
due to dissipation of heat. Avoid contact with the board. Follow all
applicable safety procedures applicable to your laboratory.
Some power supplies can be damaged by application of external voltages. If
using more than one power supply, check your equipment requirements, and
use blocking diodes or other isolation techniques as needed to prevent damage
to your equipment.
The connection of the EVM looks similar to
Resistor
Cell
Simulator
3.5
Basic Operation
The following steps are suggested for basic operation of a default EVM with the cell simulator and the
default configuration in EEPROM.
1. Confirm that the cell simulator board is installed on the EVM.
2. Connect a power supply between the BATT– (negative) and PACK+ (positive) terminals.
3. Connect a 15-kΩ, 1/4-W resistor to the CHGCTL terminal of the board.
4. Set the bench supply to approximately 29 V.
5. Connect a disabled load between the DSG– (negative) and PACK+ (positive) terminals.
6. Wake up the part by momentarily connecting the 15-kΩ resistor to the bench supply positive.
SLUU854 – February 2012
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CAUTION
WARNING
CAUTION
Figure
1.
"Battery"
supply
+
-
Figure 1. Basic EVM Setup
Copyright © 2012, Texas Instruments Incorporated
bq77908AEVM Hardware Connection and Operation
~ 15k ohm
"Charger"
supply
+
-
+
Load
-
bq77908AEVM Evaluation Module
7
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