LTC4100 datasheet(7/48 Pages) LINER

7 / 48 page

LTC1760

1760fa

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIH_MODE MODE Input High Voltage (VIH)VVCC2 = 4.85V

l VVCC2 • 0.7

MODE Input Current (IIH)

MODE = VVCC2 • 0.7V, VVCC2 = 4.85V

–1

μA

MODE Input Current (IIL)

MODE = VVCC2 • 0.3V, VVCC2 = 4.85V

–1

μA

Charger Timing

tTIMEOUT

Timeout for Wake-Up Charging and

Controlled Charging

140

175

210

sec

tQUERY

Sampling Rate Used by the LTC1760 to

Update Charging Parameters

sec

SMBus Timing

SCL Serial-Clock High Period(tHIGH)

At IPULLUP = 350μA, CLOAD = 150pF (Note 8)

4μs

SCL Serial-Clock Low Period (tLOW)

At IPULLUP = 350μA, CLOAD = 150pF (Note 8)

4.7

μs

SDA/SCL Rise Time (tr)CLOAD = 150pF, RPU = 9.31k (Note 8)

1000

SDA/SCL Fall Time (tf)CLOAD = 150pF, RPU = 9.31k (Note 8)

300

SMBus Accelerator Trip Voltage Range

0.8

1.42

Start-Condition Setup Time (tSU:STA)

4.7

μs

Start-Condition Hold Time (tHD:STA)

4μs

SDA to SCL Rising-Edge

Setup Time (tSU:DAT)

250

SDA to SCL Falling-Edge Hold Time,

Slave Clocking in Data (tHD:DAT)

300

tTIMEOUT_

SMB

The LTC1760 will Release the SMBus

and Terminate the Current Master or

Slave Command if the Command is not

Completed Before this Time

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

junction temperature range, otherwise speciﬁcations are at TA = 25°C (Note 6). VDCIN = 20V, VBAT1 = 12V, VBAT2 = 12V, VVDDS = 3.3V,

VVCC2 = 5.2V unless otherwise noted.

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 CL = 50pF.

Note 5: Accuracy dependent upon external sense resistor and

compensation components.

Note 6: The LTC1760 is tested under pulsed load conditions such that TJ ≈

TA. 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

the internal cell voltage measured by the battery electronics and may be

lower than the terminal voltage. Refer to “Operation Section 3.7” for more

information.

Note 8: CLOAD is the combined capacitance on the host’s SMBus

connection and the selected battery’s SMBus connection.

Note 9: CLOAD_MAX is the maximum allowed combined capacitance on

THxA, THxB and the battery’s SafetySignalx connections.

Note 10: Does not include current supplied by VCC to VCC2 (IVCC2_AC1 or

IVCC2_AC0)

Note 11: Measured with thermistors not present, RVLIMIT and RILIMIT

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/RSENSE may not servo correctly

due to charger offsets. The charging current for requested currents below

4mV/RSENSE will be between 4mV/RSENSE and (Requested Current – 8mA).

Refer to Applications Information: “Setting Charger Output Current Limit”

for values of RSENSE.

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.

LTC4100 数据表(PDF) 7 Page - Linear Technology

LTC4100 数据表(HTML) 7 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

数据表下载