Datasheet

Core / CPU
Measure
I/O
Safety
B0320-03
FLASH
PRE
CHG
EFCID
EFCIC
SMBus
DSG
SMBCLK
SMBDAT
SPROT
CSBAT
CSPACK
GPIO
7
CELL 4
Voltage
Temp
Balance
V4
P4N
P4S
XT4
V3
P3N
P3S
XT3
V2
P2N
P2S
XT2
CELL 3
Voltage
Temp
Balance
CELL 2
Voltage
Temp
Balance
CELL 1
Voltage
Temp
Balance
2.5VLDO
VLDO1
Watchdog
Coulomb Counter CCBAT
CCPACKCurrent A/D
SRAM
RSTN
Internal
Temperature
RISC
CPU
Internal
Oscillator
Reset
Logic
First-LevelSafety
and
FET Control
Second-Level
Safety
LED1–5/SEG1–5,
PSH/BP/TP,
FIELD
PowerLAN
Communication
Link
P-LAN
V1
P1N
P1S
XT1
bq78PL116
SLUSAB8B –OCTOBER 2010– REVISED FEBRUARY 2011 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DESCRIPTION (CONTINUED)
Temperature is sensed by up to 4 external sensors and one on-chip sensor. This permits accurate temperature
monitoring of each cell individually. Firmware is then able to compensate for the temperature-induced effects on
capacity, impedance, and OCV on a cell-by-cell basis, resulting in superior charge/ discharge and balancing
control.
External MOSFET control inputs provide user- definable direct hardware control over MOSFET states. Smart
control prevents excessive current through MOSFET body diodes. Auxiliary inputs can be used for enhanced
safety and control in large multicell arrays.
The bq78PL116 is completely user-configurable, with parametric tables in flash memory to suit a variety of cell
chemistries, operating conditions, safety controls, and data reporting needs. It is easily configured using the
supplied bqWizard™ graphical user interface (GUI). The device is fully programmed and requires no algorithm or
firmware development.
The bq78PL116 pin functions of LED1/SEG1–LED5/SEG5, PSH/BP/TP, and FIELD support LED, LCD, and
electronic paper displays (EPDs). The user can configure the bq78PL116 for the desired display type.
Figure 1. BQ78PL116 Internal Block Diagram
2 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated
Product Folder Link(s): bq78PL116