ATA6871 ATMEL Corporation, ATA6871 Datasheet - Page 8

• Manufacturer Part Number: ATA6871
• Description: Li-ion Battery Management Monitoring Emergency and Backup Circuit
• Manufacturer: ATMEL Corporation

7. Circuit Description and Electrical Characteristics
7.1
7.1.1
8
Operating Modes
ATA6871 [Preliminary]
Power-down Mode
Unless otherwise specified, all parameters in this section are valid for a supply voltage range
of 6.9V < V
–40°C < TA < 85°C, all values refer to pin VSSA, unless otherwise specified.
The ATA6871 has two operation modes:
1) Power-down Mode
2) ON Mode/Selfdiagnosis
In Power-down Mode all blocks of the IC are switched off.
The circuit can be switched from Power-down to ON Mode or back via the PD_N input. If the pin
is connected to VDDHV, for example, via an external optocoupler the circuit is in ON Mode. If
several ATA6871 are stacked, the power-down signal must be only provided for the IC on the
top level of the stack. The next lower IC is getting this information from the PD_N_OUT output of
it's upper IC. The PD_N_OUT pin must be connected either to the PD_N pin of the next lower
ATA6871 or to VSSA.
VDD HV
< 30V and a battery cell voltage of V
(MBATi+1)
www.DataSheet4U.com
– V
MBATi
9123B–AUTO–07/09
= 0V to 5V,