ltc1760 Linear Technology Corporation, ltc1760 Datasheet - Page 6

• Manufacturer Part Number: ltc1760
• Description: Dual Smart Battery System Manager
• Manufacturer: Linear Technology Corporation

LTC1760
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
unless otherwise noted.
SYMBOL
V
V
V
V
Charger Timing
t
t
SMBus Timing
t
6
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2. Battery voltage must be adequate to drive gates of power path
P-channel FET switches. This does not affect charging voltage of the
battery, which can be zero volts during wake-up charging.
Note 3. DCIN, BAT1, BAT2 are held at 12V and GDCI, GB1I, GB2I are
forced to 10.5V. SCP is set at 12V to measure source current at GDCI,
GB1I and GB2I. SCP is set at 11.9V to measure sink current at GDCI, GB1I
and GB2I.
Note 4. Extrapolated from testing with C
Note 5. Accuracy dependent upon external sense resistor and
compensation components.
TIMEOUT
QUERY
TIMEOUT_SMB
IL_VDDS
IH_VDDS
IL_MODE
IH_MODE
PARAMETER
SCL/SCL1/SCL2/SDA/SDA1/ SDA2/
SMBALERT Power Down Leakage
SMBALERT Output Low Voltage (V
SMBALERT Output Pull-Up Current
V
V
V
V
MODE Input Low Voltage (V
MODE Input High Voltage (V
MODE Input Current (I
MODE Input Current (I
Timeout for Wake-Up Charging and
Controlled Charging
Sampling Rate Used by the LTC1760 to
Update Charging Parameters
SCL Serial-Clock High Period(t
SCL Serial-Clock Low Period (t
SDA/SCL Rise Time (t
SDA/SCL Fall Time (t
SMBus Accelerator Trip Voltage Range
Start-Condition Setup Time (t
Start-Condition Hold Time (t
SDA to SCL Rising-Edge
Setup Time (t
SDA to SCL Falling-Edge Hold Time,
Slave Clocking in Data (t
The LTC1760 will Release the SMBus
and Terminate the Current Master or
Slave Command if the Command is not
Completed Before this Time
DDS
DDS
DDS
DDS
Input Low Voltage (V
Input High Voltage (V
Operating Voltage
Operating Current
SU:DAT
)
f
)
r
IH
IL
)
)
)
HD:DAT
L
IL
= 50pF.
IH
IL
)
HD:STA
IH
)
SU:STA
)
)
HIGH
)
LOW
)
OL
)
)
)
)
CONDITIONS
V
V
V
I
V
V
V
V
MODE = V
MODE = V
At I
At I
C
C
PULLUP
A
VCC2
SCL
SDA1
SMBALERT
SCL
VCC2
VCC2
LOAD
LOAD
= 25°C. V
PULLUP
PULLUP
, V
, V
, V
= 0V, V
= 4.85V
= 4.85V
= 150pF, RPU = 9.31k (Note 8)
= 150pF, RPU = 9.31k (Note 8)
SCL1
SDA
The
= 500µA
SDA2
VCC2
VCC2
= 350µA, C
= 350µA, C
= 0.4V
= V
, V
●
, V
DCIN
VDDS
SCL2
VDDS
• 0.7V, V
• 0.3V, V
denotes the specifications which apply over the full operating
SMBALERT
, V
= 20V, V
= 0V,
, V
Note 6. The LTC1760C is guaranteed to meet specified performance from
0°C to 70°C and is designed, characterized and expected to meet specified
performance at –40°C and 85°C, but is not tested at these extended
temperature limits.
Note 7. Charger servos to the value reported by a Voltage() query. This is
the internal cell voltage measured by the battery electronics and may be
lower than the terminal voltage. See “Operation Section 3.6” for more
information.
Note 8. C
connection and the selected battery’s SMBus connection.
Note 9. C
THxA, THxB and the battery’s SafetySignalx connections.
SDA
LOAD
LOAD
VDDS
VCC2
VCC2
,
= 5.5V
= 150pF (Note 8)
= 150pF (Note 8)
= 5V
BAT1
= 4.85V
= 4.85V
LOAD
LOAD_MAX
= 12V, V
is the combined capacitance on the host’s SMBus
is the maximum allowed combined capacitance on
BAT2
= 12V, V
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
V
VCC2
MIN
140
250
300
3.5
2.6
4.7
0.8
4.7
–1
–1
25
VDDS
3
4
4
• 0.7
= 3.3V, V
TYP
175
10
1
VCC2
V
VCC2
1000
MAX
17.5
1.42
210
300
0.4
1.5
5.5
18
35
2
1
1
= 5.2V
• 0.3
UNITS
1760f
sec
sec
ms
uA
µA
µA
µA
µA
µs
µs
ns
ns
µs
µs
ns
ns
V
V
V
V
V
V
V