LTC1479CG Linear Technology, LTC1479CG Datasheet
LTC1479CG
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LTC1479CG Summary of contents
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... MOSFET switches during transitions. The LTC1479 interfaces di- rectly to the LT1510, LT1511 and LT1620/LTC1435 bat- tery charging circuits. , LTC and LT are registered trademarks of Linear Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. TM Controller System Block Diagram ...
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... Regulator Output Current ................................ 1mA CC V Regulator Output Current .............................. 1mA CCP + V Output Current .................................................. 1mA V Regulator Output Current ............................ 100 A GG Operating Temperature LTC1479CG ............................................. LTC1479IG ........................................ – Junction Temperature........................................... 125 C Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C DC ELECTRICAL CHARACTERISTICS V = 25V 16V 12V, T DCIN BAT1 ...
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DC ELECTRICAL CHARACTERISTICS V = 25V 16V 12V, T DCIN BAT1 BAT2 SYMBOL PARAMETER DCIN Good Monitor V DCDIV Threshold Voltage THDCDIV V DCDIV Hysteresis Voltage HYSDCDIV I DCDIV Input Bias Current BIASDCDIV V DCINGOOD Output ...
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LTC1479 AC ELECTRICAL CHARACTERISTICS V = 25V 16V 12V, T DCIN BAT1 BAT2 SYMBOL PARAMETER t Gate A/B Turn-On Time ONGA/GB t Gate C/D Turn-On Time ONGC/GD t Gate E/F Turn-On Time ONGE/GF t Gate A/B ...
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W U TYPICAL PERFORMANCE CHARACTERISTICS DCIN Supply Current 350 MODE 1, DCDIV = 1.5V NO OTHER POWER 300 250 200 150 100 DCIN SUPPLY VOLTAGE ...
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LTC1479 PIN FUNCTIONS External Power Supply Pins DCIN (Pin 1): Supply Input. A 330 resistor should be put in series with this pin and the external DC power source. A 0.1 F bypass capacitor should be connected ...
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PIN FUNCTIONS – SENSE (Pin 14): Inrush Current Input. This pin should be connected directly to the “bottom” (output side) of the low valued resistor in series with the three input power selector switch pairs, SW A/B, ...
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LTC1479 W BLOCK DIAGRAM DCIN GA DCIN DCDIV MONITOR DRIVERS BAT1 BAT2 DCIN + CCP REGULATOR V CC & BIAS GENERATOR SWITCHING REGULATOR V CCP CCP BAT2 BAT1 ...
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DIAGRA S MODE 1 MODE 2 DC OPERATION DC OPERATION BAT1 DISCONNECTED BAT1 CHARGING 25V DCIN 0V 25V OUTPUT 0V DCINGOOD DCIN/BAT BATDIS BATSEL CHGSEL NOTE: FOR MODES 3DM = H, ...
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LTC1479 U OPERATION The LTC1479 is responsible for low-loss switching at the “front end” of the power management system, where up to two battery packs and a DC power source can be indiscriminately connected and disconnected. Smooth switching between input ...
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U OPERATION This scheme allows capacitors and MOSFET switches of differing sizes and current ratings to be used in the same system without circuit modifications. After the transition period has passed, the V MOSFETs in the selected switch pair rises ...
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LTC1479 U U APPLICATIONS INFORMATION POWER PATH SWITCHING CONCEPTS Power Source Selection The LTC1479 drives low-loss switches to direct power in the main power path of a dual rechargeable battery system — the type found in most notebook computers and ...
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U U APPLICATIONS INFORMATION In the “3-diode” mode, only the first half of each power path switch pair, i.e and turned on; and the second half, i.e and SW ...
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LTC1479 U U APPLICATIONS INFORMATION be high enough to withstand the maximum battery or charger output voltage. In most cases, this will allow the use of 20V MOSFET switches in the charger path, while 30V switches are used in the ...
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U U APPLICATIONS INFORMATION V LOBAT R = 121k – 1.215V V Regulator Inductor and Capacitors GG The V regulator provides a power supply voltage signifi- GG cantly higher than any of the three main power source voltages ...
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LTC1479 U U APPLICATIONS INFORMATION SW A DCIN 0.1 F 330 R DC2 DCIN GA Li-ION DCDIV BATTERY PACK #1 R DC1 BAT1 BAT2 Li-ION V BATTERY BAT PACK # BDIV CCP + ...
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U U APPLICATIONS INFORMATION the charging battery through one of the N-channel switch pairs The charging battery voltage is simultaneously connected through the CHGMON switch in the LTC1479 to the top of the charger voltage ...
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LTC1479 U U APPLICATIONS INFORMATION The LT1511 has a third control loop that regulates the current drawn from the AC adapter. Therefore, the DC input to the LTC1479 and the input to the host system through SW A/B, is obtained ...
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U U APPLICATIONS INFORMATION POWER MANAGEMENT C E BAT1 C BAT1 4 Li-ION 10 F BATTERY SW G PACK Si9926DY – + BAT2 + 4 Li-ION C BAT2 BATTERY 10 F PACK – ...
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... Smart Management Bus (SMBus) SMBDATA and SMBCLK lines from an integrated circuit inside the battery pack. Applications Assistance Linear Technology applications engineers have developed a smart battery charger around the LT1511 charger IC. Contact the factory for applications assistance in develop- ing a complete smart battery system with intelligent ...
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U TYPICAL APPLICATIONS Dual NiMH Battery Power Management System (Using an LT1510, 1A Charger) Si4936DY 330 0 DC2 205k DCIN GA SAB GB 1% DCDIV R DC1 12.1k 1% BAT1 BAT2 V BAT R ...
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LTC1479 U TYPICAL APPLICATIONS Si4936DY 330 0 DC2 205k DCIN GA SAB GB 1% DCDIV R DC1 12.1k 1% BAT1 BAT2 V BAT R B2 909k 1% BDIV R B1 121k 1% V CCP ...
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... F BAT2 Si9926DY PACK Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights SENSE 0.033 ...
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... For Dual Loop Applications 0.499 – 0.509* (12.67 – 12.93 0.301 – 0.311 (7.65 – 7.90 0.068 – 0.078 (1.73 – 1.99) 0.002 – 0.008 (0.05 – 0.21) G36 SSOP 1196 = Shutdown Q 1479f LT/TP 0697 7K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1996 ...