LP3947ISD-51 Datasheet, PDF (3/20 Pages) Texas Instruments – LP3947 USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC

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LP3947
SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013
LP3947 FUNCTIONAL BLOCK DIAGRAM
Mode
SDA
SCL
EN
ON/OFF
I²C and Digital
Control
LED
Driver
ISEL
CHG
EOC
CHG-IN
Power
FET
Control
TS
Charger
control
Vref
LDO
Error
Amp
R_SENSE
+
-
LDO
Mode
+
-
UTLO
-
+
OTLO
+
-
BATT
Diff Amp
V_T
ABSOLUTE MAXIMUM RATINGS ^{(1) (2)}
If Military/Aerospace specified devices are required, contact the Texas Instruments Semiconductor Sales Office/
Distributors for availability and specifications.
CHG-IN
All pins except GND and CHG-IN ⁽³⁾
−0.3V to +6.5V
−0.3V to +6V
Junction Temperature
150°C
Storage Temperature
Power Dissipation ⁽⁴⁾
ESD ⁽⁵⁾
Human Body Model
Machine Model
−40°C to +150°C
1.89W
2 kV
200V
(1) All voltages are with respect to the potential at the GND pin.
(2) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is ensured. Operating Ratings do not imply verified performance limits. For specified performance limits and
associated test conditions, see the Electrical Characteristics tables.
(3) Caution must be taken to avoid raising pins EN and V_T 0.3V higher than V_CHG-IN and raising pins ISEL, MODE, SCL and SDA 0.3V
higher than V_BATT.
(4) The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using the formula
MM P = (T_J – T_A)θ_JA,
where T_J is the junction temperature, T_A is the ambient temperature, and θ_JA is the junction-to-ambient thermal resistance. The 1.89W
rating appearing under Absolute Maximum Ratings results from substituting the Absolute Maximum junction temperature, 150°C, for T_J,
80°C for T_A, and 37°C/W for θ_JA. More power can 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.
(5) The human-body model is used. The human-body model is 100 pF discharged through 1.5 kΩ.
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