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LP3947ISD-51 Datasheet(PDF) 4 Page - Texas Instruments |
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LP3947ISD-51 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 20 page LP3947 SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 www.ti.com RECOMMENDED OPERATING CONDITIONS (1) (2) CHG-IN 0.3V to 6.5V EN, ISEL, MODE, SCL, SDA, VT (3) 0V to 6V Junction Temperature −40°C to +125°C Operating Temperature −40°C to +85°C Thermal Resistance θJA 37°C/W Maximum Power Dissipation (4) 1.21W (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 ensured. Operating Ratings do not imply verified performance limits. For specified performance limits and associated test conditions, see the Electrical Characteristics tables. (2) All voltages are with respect to the potential at the GND pin. (3) Caution must be taken to avoid raising pins EN and VT 0.3V higher than VCHG-IN and raising pins ISEL, MODE, SCL and SDA 0.3V higher than VBATT. (4) 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 TJ, 80°C for TA, and 37°C/W for θJA into (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. ELECTRICAL CHARACTERISTICS Unless otherwise noted, VCHG-IN = 5V, VBATT = 4V, CCHG-IN = 1 µF, CBATT = 10 µF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = −40°C to +85°C. (1) (2) (3) Limit Symbol Parameter Conditions Typ Units Min Max VCC SUPPLY VCHG-IN Input Voltage Range 4.5 6 V VUSB 4.3 6 ICC Quiescent Current VCHG-IN ≤ 4V 2 20 µA EOC = Low, adaptor connected, VBATT = 50 150 4.1V VOK-TSHD Adaptor OK Trip Point (CHG-IN) VCHG-IN –VBATT (Rising) 60 mV VCHG-IN –VBATT (Falling) 50 mV VUVLO-TSHD Under Voltage Lock-Out Trip Point VCHG-IN (Rising) 3.95 3.6 4.3 V VCHG-IN (Falling) 3.75 3.4 4.1 V VOVLO-TSHD Over Voltage Lock-Out Trip Point VCHG-IN (Rising) 5.9 V VCHG-IN (Falling) 5.7 Thermal Shutdown Temperature (2) 160 °C Thermal Shutdown Hysteresis 20 BATTERY CHARGER ICHG Fast Charge Current Range ISEL = High, In USB Mode 100 ISEL = Low, In USB Mode 500 mA In AC Adaptor Mode 100 750 Fast Charge Current Accuracy ICHARGE = 100 mA or 150 mA −20 +20 mA ICHARGE ≥ 200 mA −10 +10 % IPRE-CHG Pre-Charge Current VBATT = 2V 45 70 mA (1) All limits are specified. All electrical characteristics having room-temperature limits are tested during production with TJ = 25°C. All hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control. (2) Specified by design. (3) LP3947 is not intended as a Li-Ion battery protection device, any battery used in this application should have an adequate internal protection. 4 Submit Documentation Feedback Copyright © 2004–2013, Texas Instruments Incorporated Product Folder Links: LP3947 |
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