Understanding the Battery Pack
BATT-14AAAPACKUG Rev. 1.0
Freescale Semiconductor, Inc.
5
3
Understanding the Battery Pack
3.1
BATT-14AAAPACK Overview
The BATT-14AAAPACK is a 3-cell to 14-cell configurable battery pack designed to work in conjunction with evaluation boards such as the
KIT33771TPLEVB, the KIT33771SPIEVB, or the KIT33772ASP1EVB. It offers a compact and easily accessible standard battery platform
that connects directly to the evaluation boards through a 34-pin ribbon cable. The BATT-14AAAPACK thereby eliminates the need for
designing additional hardware to connect with a series of batteries.
The BATT-14AAAPACK includes 14 battery holders (standard AAA format, also known as LR3) connected in series, an optional current
sense resistor, configuration jumpers, and a 1.3mm jack for charging.
3.2
Battery Pack Features
The BATT-14AAAPACK features
•
14 AAA battery holders
•
34-pin header compatible with KIT33771TPLEVB, KIT33771SPIEVB, and KIT33772ASP1EVB
•
1.3mm jack serial charging jack (to be used only with proper serial charger and rechargeable batteries)
•
2mm banana connectors
•
0.1
Ω
resistor for current measurement
•
Current measurement configuration jumper
•
MC33771/MC33772 configuration jumper
•
Protection fuse
3.3
Block Diagram
Figure 2. BATT-14AAAPACK Block Diagram
+
VBAT
Cell Terminal
Outputs
[CT_1 ... CT_14]
Current Sense
Outputs
ISENSEL /
ISENSEH
GND
Banana
socket
1.3 mm
jack
Banana
socket
Current
sense
Fuse
34-pin Connector
+
+
+
+
14 AAA
Battery
Holders
