ATA6871 ATMEL Corporation, ATA6871 Datasheet - Page 12

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

Table 7-4.
7.3
12
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
No. Parameters
3.1
3.2
3.3
3.4
3.5
3.6
3.7
Overvoltage detection on
threshold
Overvoltage detection off
threshold
Overvoltage detection
hysteresis
Undervoltage detection on
threshold
Undervoltage detection off
threshold
Undervoltage detection
hysteresis
Debouncing time
Battery Cell Overtemperature Detection
ATA6871 [Preliminary]
Electrical Characteristics
If the voltage at the input TEMP_IN is less than the half of VDD threshold for t > t
OROUT output goes high.
To disable this function, connect TEMP_IN to VDD.
If the input is open (high impedance), an internal current will force the comparator to the over-
temperature state and OROUT will switch to high.
Figure 7-2.
Test Conditions
Overtemperature Detection
NTC
Rref
VSSA
VDD
MBAT(i)
MBAT(i)
MBAT(i)
MBAT(i)
MBAT(i)
MBAT(i)
Pin
TEMP_IN
ΔV
ΔV
I
V
V
V
V
TEMP_IN
– V
– V
– V
– V
– V
– V
(MBAT(i+1))
(MBAT(i+1))
(MBAT(i+1))
(MBAT(i+1))
(MBAT(i+1))
(MBAT(i+1))
Symbol
t
Debounce
MBAT(i)
MBAT(i)
MBAT(i)
MBAT(i)
MBAT(i)
MBAT(i)
VDD/2
Min.
4.3
4.2
1.7
1.8
70
70
1
Typ.
4.45
4.35
1.8
1.9
Overtemp
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Max.
4.6
4.5
1.9
2.0
3
9123B–AUTO–07/09
Unit
mV
mV
Debounce
V
V
V
V
s
Type*
,
A
A
A
A
A
A
A
the