AS8506C Datasheet, PDF (1/94 Pages) ams AG – Battery Cell Monitor and Balancer IC

General Description
AS8506C
Battery Cell Monitor and Balancer IC
The AS8506C is a battery management IC dedicated to support
cell voltage measurement, monitoring, cell balancing and
temperature measurement functions in Li-Ion battery stacks for
industrial/consumer/PV battery applications.
Ambient temperature range is from -40°C to +85°C.
It features cell voltage diagnosis with externally adjustable
upper and lower cell voltage limits, fast cell voltage capture on
request through 12-bit SAR ADC, passive cell balancing by
simultaneous comparison of actual cell voltages with a
reference cell voltage and temperature measurement on two
external NTC sensors through 12-bit ADC.
Cells that are above reference will sequentially be discharged
through integrated switches and one external resistor.
There is also an active balancing option AS8506C A through
factory setting to sequentially charge cells which are below
reference from an external DC-DC Flyback converter and an
integrated low side driver.
The device can be used flexibly for battery stacks up to 7 cells
with a minimum stack voltage of 6V and a maximum stack
voltage of 32V.
It can be chained to support battery packs of virtually any
number of cells in synchronized mode through chained clock
and trigger signal.
The status of the battery stack is communicated to outside
world through OR’d voltage_ok signal and balance ready signal.
Ordering Information and Content Guide appear at end of
datasheet.
ams Datasheet: 2014-Jun-23 [v1-00]
AS8506C – 1