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| 型号： | LTC1760IFW#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/48页 |
| 文件大小： | 0K |
| 描述： | IC MANAGER BATTERY DUAL 48TSSOP |
| 标准包装： | 1,800 |
| 功能： | 充电管理，电源管理 |
| 电池化学： | 智能电池 |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-TFSOP（0.240"，6.10mm 宽） |
| 供应商设备封装： | 48-TSSOP |
| 包装： | 带卷 (TR) |
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LTC1760
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
junction temperature range, otherwise speci?cations are at T A = 25°C (Note 6). V DCIN = 20V, V BAT1 = 12V, V BAT2 = 12V, V VDDS = 3.3V,
V VCC2 = 5.2V unless otherwise noted.
SYMBOL PARAMETER
V IH_MODE MODE Input High Voltage (V IH )
CONDITIONS
V VCC2 = 4.85V
l
MIN
V VCC2 ? 0.7
TYP
MAX
UNITS
V
MODE Input Current (I IH )
MODE Input Current (I IL )
MODE = V VCC2 ? 0.7V, V VCC2 = 4.85V
MODE = V VCC2 ? 0.3V, V VCC2 = 4.85V
l
l
–1
–1
1
1
μA
μA
Charger Timing
t TIMEOUT
Timeout for Wake-Up Charging and
l
140
175
210
sec
Controlled Charging
t QUERY
Sampling Rate Used by the LTC1760 to
1
sec
Update Charging Parameters
SMBus Timing
SCL Serial-Clock High Period(t HIGH )
SCL Serial-Clock Low Period (t LOW )
SDA/SCL Rise Time (t r )
SDA/SCL Fall Time (t f )
At I PULLUP = 350μA, C LOAD = 150pF (Note 8)
At I PULLUP = 350μA, C LOAD = 150pF (Note 8)
C LOAD = 150pF, RPU = 9.31k (Note 8)
C LOAD = 150pF, RPU = 9.31k (Note 8)
l
l
l
l
4
4.7
1000
300
μs
μs
ns
ns
SMBus Accelerator Trip Voltage Range
Start-Condition Setup Time (t SU:STA )
Start-Condition Hold Time (t HD:STA )
SDA to SCL Rising-Edge
l
l
l
l
0.8
4.7
4
250
1.42
V
μs
μs
ns
Setup Time (t SU:DAT )
SDA to SCL Falling-Edge Hold Time,
l
300
ns
Slave Clocking in Data (t HD:DAT )
t TIMEOUT_ The LTC1760 will Release the SMBus
l
25
35
ms
SMB
and Terminate the Current Master or
Slave Command if the Command is not
Completed Before this Time
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Battery voltage must be adequate to drive gates of PowerPath
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 L = 50pF.
Note 5: Accuracy dependent upon external sense resistor and
compensation components.
Note 6: The LTC1760 is tested under pulsed load conditions such that T J ≈
T A . The LTC1760C is guaranteed to meet specifications from 0°C to 70°C
junction temperature. Specifications over the –40°C to 85°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC1760I is guaranteed
over the –40°C to 125°C operating junction temperature range.
Note 7: Charger servos to the value reported by a Voltage() query. This is
lower than the terminal voltage. Refer to “Operation Section 3.7” for more
information.
Note 8: C LOAD is the combined capacitance on the host’s SMBus
connection and the selected battery’s SMBus connection.
Note 9: C LOAD_MAX is the maximum allowed combined capacitance on
THxA, THxB and the battery’s SafetySignalx connections.
Note 10: Does not include current supplied by V CC to V CC2 (I VCC2_AC1 or
I VCC2_AC0 )
Note 11: Measured with thermistors not present, R VLIMIT and R ILIMIT
removed and SMBALERT = 1. See Applications Information section:
“Calculating IC Operating Current” for example on how to calculate total IC
operating current.
Note 12: Requested currents below 44mV/R SENSE may not servo correctly
due to charger offsets. The charging current for requested currents below
4mV/R SENSE will be between 4mV/R SENSE and (Requested Current – 8mA).
Refer to Applications Information: “Setting Charger Output Current Limit”
for values of R SENSE .
Note 13: This limit is greater than the absolute maximum for the charger.
Therefore, there is no effective limitation for the voltage when this option
is selected.
Note 14: Does not apply to Wake-Up Mode.
the internal cell voltage measured by the battery electronics and may be
1760fa
7
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