LTC4007EUFD-1#TRPBF Linear Technology, LTC4007EUFD-1#TRPBF Datasheet
LTC4007EUFD-1#TRPBF
Specifications of LTC4007EUFD-1#TRPBF
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LTC4007EUFD-1#TRPBF Summary of contents
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... The FAULT pin is also asserted and charging terminates if the low-battery condition persists for more than 1/4 of the total charge time. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Protected by U.S. Patents including 5723970. ...
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... PACKAGE/ORDER + 32V/– 0.3V EXPOSED PAD (PIN 25), GND AND PGND SHOULD BE CONNECTED ORDER PART NUMBER LTC4007EUFD-1 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges. ...
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ELECTRICAL CHARACTERISTICS temperature range (Note 4), otherwise specifications are at T SYMBOL PARAMETER Current Sense Amplifier, CA1 Input Bias Current Into BAT Pin CMSL CA1/I Input Common Mode Low 1 CMSH CA1/I Input Common Mode High 1 Current Comparators I ...
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LTC4007-1 ELECTRICAL CHARACTERISTICS temperature range (Note 4), otherwise specifications are at T SYMBOL PARAMETER V Low Logic Level of ACP, CHG, FLAG, LOBAT FAULT CL V High Logic Level of CHG, LOBAT Off State ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS INFET Response Time to Reverse Current V OF PFET (2V/DIV PFET (5V/DIV (REVERSE PFET (5A/DIV ...
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LTC4007 TYPICAL PERFOR A CE CHARACTERISTICS Efficiency at 19VDC V 100 16.8V 95 12. 0.50 1.00 1.50 CHARGE CURRENT ( CTIO S ACP(Pin 1): Open-Drain output to indicate if ...
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CTIO S PROG (Pin 9): Current Programming/Monitoring Input/ Output. An external resistor to GND programs the peak charging current in conjunction with the current sensing resistor. The voltage at this pin provides a linear indication ...
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LTC4007-1 W BLOCK DIAGRA 0.1µ DCIN 23 5.8V INFET Q3 21 ACP 1 SHDN 22 FAULT 3 FLAG 14 GND 4 3C4C 5 CHEM 13 + LOBAT 6 – 921mV 1.19V 5k CLP Ω – 1.4m ...
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TEST CIRCUIT U OPERATIO Overview The LTC4007 synchronous current mode PWM step-down (buck) switcher battery charger controller. The charge current is programmed by the combination of a program resistor (R ) from the PROG pin to ground PROG ...
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LTC4007-1 U OPERATIO Table 1. Truth Table for LTC4007-1 Operation (Supplemental) FROM TO NUMBER STATE STATE MODE 1 Any MSD Shut Down by Low Adapter Voltage 2 MSD SD Charger Shutdown 3 SD, SD Shut Down by CONDITION, Undervoltage Lockout ...
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U OPERATIO gate of the input FET is driven to a voltage sufficient to keep a low forward voltage drop from drain to source. If the voltage between DCIN and CLN drops to less than 25mV, the input FET is ...
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LTC4007-1 U OPERATIO adjusts ITH until: + µ – REF = CSP BAT Ω PROG therefore, ⎛ V REF = ⎜ I – CHARGE MAX ( ...
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U OPERATIO the timing resistor connected to R closed to sample the thermistor 127.5 • 20 • R • 17.5pF = 13.8ms, SAMPLE RT for R = 309k RT The external RC network is driven to approximately 4.5V ...
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LTC4007 APPLICATIO S I FOR ATIO Battery Detection It is generally not good practice to connect a battery while the charger is running. The timer unknown state and the charger could provide a large surge ...
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U U APPLICATIO S I FOR ATIO the full-scale voltage is reduced then 2.49k and R = 26.7k, the maximum charging current is still 2.5A PROG but the FLAG trip point is maintained at 10% of ...
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LTC4007 APPLICATIO S I FOR ATIO used when tantalum capacitors are used for input or output bypass . High input surge currents can be created when the adapter is hot-plugged to the charger or when a battery is ...
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U U APPLICATIO S I FOR ATIO Charger Switching Power MOSFET and Diode Selection Two external power MOSFETs must be selected for use with the charger: a P-channel MOSFET for the top (main) switch and an N-channel MOSFET for the ...
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LTC4007 APPLICATIO S I FOR ATIO Adapter Limiting An important feature of the LTC4007-1 is the ability to automatically adjust charging current to a level which avoids overloading the wall adapter. This allows the prod- uct to operate ...
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U U APPLICATIO S I FOR ATIO LTC4007-1 R9 NTC 7 C7 Figure 10. General Thermistor Network If you are using a thermistor that doesn’t have a 1:7 HIGH/ LOW ratio, or you wish to set the HIGH/LOW limits to ...
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LTC4007 APPLICATIO S I FOR ATIO Disabling the Thermistor Function If the thermistor is not needed, connecting a resistor between DCIN and NTC will disable it. The resistor should be sized to provide at least 10µA with the ...
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U U APPLICATIO S I FOR ATIO General Rules (Continued) 7. Connection of switching ground to system ground or internal ground plane should be single point. If the system has an internal system ground plane, a good way to do ...
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LTC4007 APPLICATIO S I FOR ATIO DCIN 0V TO 20V 3A 3C4C V * LOGIC R10 R11 R12 CHEM * 100k 100k 100k LOBAT LOBAT ACP ACP SHDN SHDN FAULT FAULT CHG CHG FLAG ...
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... DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 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. W ...
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... High Efficiency, Standalone Li-Ion Battery Charger Complete Charger for 3- or 4-Cell Li-Ion Batteries, AC Adapter Current Limit LTC4008 High Efficiency, Programmable Voltage/Current Battery Charger LTC4100 Smart Battery Charger Controller trademark of Linear Technology Corporation. SENSE Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...