LP3947ISD-51 National Semiconductor, LP3947ISD-51 Datasheet - Page 6

• Manufacturer Part Number: LP3947ISD-51
• Description: CHARGER, USB, I2C, POWERWISE, LLP-14
• Manufacturer: National Semiconductor

Specifications of LP3947ISD-51

• Battery Type: Li-Ion
• Input Voltage: 6V
• Battery Charge Voltage: 4.2V
• Charge Current Max: 750mA
• Battery Ic Case Style: LLP
• No. Of Pins: 14
• No. Of Series Cells: 1
• Operating Temperature Range: -40°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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t
t
t
t
t
SU
DATA-HOLD
DATA-SU
SU
TRANS
Symbol
Electrical Characteristics, I
Unless otherwise noted, V
25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, T
(Notes 7, 8, 9)
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: Caution must be taken to avoid raising pins EN and V
Note 4: The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using the formula
where T
Absolute Maximum Ratings results from substituting the Absolute Maximum junction temperature, 150˚C, for T
be dissipated safely at ambient temperatures below 80˚C. Less power can be dissipated safely at ambient temperatures above 80˚C. The Absolute Maximum power
dissipation can be increased by 27 mW for each degree below 80˚C, and it must be de-rated by 27 mW for each degree above 80˚C.
Note 5: The human-body model is used. The human-body model is 100 pF discharged through 1.5 kΩ.
Note 6: Like the Absolute Maximum power dissipation, the maximum power dissipation for operation depends on the ambient temperature. The 1.21W rating
appearing under Operating Ratings results from substituting the maximum junction temperature for operation, 125˚C, for T
(1) above. More power can be dissipated at ambient temperatures below 80˚C. Less power can be dissipated at ambient temperatures above 80˚C. The maximum
power dissipation for operation can be increased by 27 mW for each degree below 80˚C, and it must be de-rated by 27 mW for each degree above 80˚C.
Note 7: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with T
guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control.
Note 8: Guaranteed by design.
Note 9: LP3947 is not intended as a Li-Ion battery protection device, any battery used in this application should have an adequate internal protection.
Note 10: The
points. For example, at 0.2C, the End Of Charge current accuracy becomes
J
is the junction temperature, T
Set-Up Time Repeated START
Condition
Data Hold Time
Data Set-Up Time
Set-Up Time for STOP Condition
Maximum Pulse Width of Spikes that
must be Suppressed by the Input
Filter of both DATA & CLK Signals.
±
10 mA limits apply to all charge currents from 100 mA to 450 mA, to 0.1C End Of Charge (EOC). The limits increase proportionally with higher EOC
Parameter
CHG-IN
A
is the ambient temperature, and θ
= V
DD
= 5V, V
2
FIGURE 1. Li-Ion Charging Profile
C Interface
BATT
T
(Note 8)
(Note 8)
(Note 8)
(Note 8)
(Note 8)
0.3V higher than V
= 4V. Typical values and limits appearing in normal type apply for T
P = (T
JA
±
J
20 mA.
Conditions
is the junction-to-ambient thermal resistance. The 1.89W rating appearing under
– T
6
CHG-IN
A
(Continued)
)θ
JA
,
and raising pins ISEL, MODE, SCL and SDA 0.3V higher than V
J
, 80˚C for T
Typ
50
A
J
, and 37˚C/W for θ
, 80˚C for T
J
Min
300
100
0.6
0.6
= 25˚C. All hot and cold limits are
J
Limit
A
, and 37˚C/W for θ
= −40˚C to +125˚C.
JA
Max
. More power can
20111004
J
JA
BATT
Units
=
into
µs
ns
ns
µs
ns
.
(1)