Texas Instruments bq34z100EVM, User Manual, Page: 5 / 28

2.3 EVM Connections
This section covers the hardware connections for the EVM (see Figure 2-1 ).
Figure 2-1. bq34z100 Circuit Module Connection to Cells and System Load and Charger
• Direct connection to the cells: BAT–, BAT+
The bq34z100 monitors the cell stack voltage. Connect the bottom of the stack to BAT– and the top of the
stack to BAT+. The stack voltage can range from 3 V to 48 V (see
Figure 2-1 ).
STACK VOLTAGE J5 HEADER J2 HEADER
Less than 5 V < 5-V jumpers N/A
Greater than 5 V > 5-V jumpers 16 V, 32 V or 48 V
WARNING
Applying a voltage greater than 5 V when jumpers are configured to < 5-V operation will damage
the IC. Do not apply power until you have completed the
EVM Connections section.
• To the serial communications port (SCL, SDA)
Attach the Communications Interface Adapter cable to the J7 terminal block and to an EV2300 or EV2400
adapter box. Connect the PC USB cable to the EV2300 or EV2400 and the PC USB port (see
Figure 2-1 ).
• The charger and system load connection across BAT+ and PACK–
Attach the charger or load to the TB3 terminal block. Connect the positive load wire to BAT+ and the ground
wire for the load to PACK– (see
Figure 2-1 ).
• The ALERT output
The ALERT output is an active low interrupt. The ALERT Configuration register selects the Control Status bits
that will activate the interrupt. The ALERT pin is an open drain output and a pull-up resistor must be attached
to the TB1 to use the feature.
www.ti.com bq34z100 Quick Start Guide
SLUU904B – APRIL 2012 – REVISED APRIL 2021
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