AS8506 Datasheet, PDF (1/89 Pages) ams AG – Battery Cell Monitor and Balancer IC

General Description
AS8506
Battery Cell Monitor and Balancer IC
The AS8506 is a battery management IC dedicated to support
cell voltage measurement, monitoring, cell balancing and
temperature measurement functions in Li-Ion battery stacks for
electric/hybrid electric vehicles or in other
industrial/consumer/PV battery applications.
There are two device versions available:
• The AS8506 is AEC - Q100 automotive qualified.
• The AS8506C is for industrial and other applications.
Ambient temperature range for both products 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 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.
For further understanding in regards to the contents of the
datasheet, please refer to the Reference Guide located at the end
of the document.
ams Datasheet, Confidential:2013-Sep [1-00]
AS8506 – 1