LTC4000-1 High Voltage High Current Controller for Battery Charging with Maximum Power Point Control Fea T Descrip T n Maximum Power Control: Solar Panel Input The LTC 4000-1 is a high voltage, high performance Compatible controller that converts many externally compensated n Complete High Performance Battery Charger When DC/DC power supplies into full-featured battery chargers Paired with a DC/DC Converter with maximum power point control. In contrast to the n Wide Input and Output Voltage Range: 3V to 60V LTC4000, the LTC4000-1 has an input voltage regulation n Input Ideal Diode for Low Loss Reverse Blocking loop instead of the input current regulation loop. and Load Sharing Features of the LTC4000-1s battery charger include: n Output Ideal Diode for Low Loss PowerPath and accurate (0.25%) programmable float voltage, select- Load Sharing with the Battery able timer or current termination, temperature qualified n Programmable Charge Current: 1% Accuracy charging using an NTC thermistor, automatic recharge, n 0.25% Accurate Programmable Float Voltage C/10 trickle charge for deeply discharged cells, bad battery n Programmable C/X or Timer Based Charge detection and status indicator outputs. The battery charger Termination also includes precision current sensing that allows lower n NTC Input for Temperature Qualified Charging sense voltages for high current applications. n 28-Lead 4mm 5mm QFN or SSOP Packages The LTC4000-1 supports intelligent PowerPath control. An external PFET provides low loss reverse current protec- a T tion. Another external PFET provides low loss charging n Solar Powered Battery Charger Systems or discharging of the battery. This second PFET also n Battery Charger with High Impedance Input Source, facilitates an instant-on feature that provides immediate e.g., Fuel Cell or Wind Turbine downstream system power even when connected to a n Battery Equipped Industrial or Portable Military heavily discharged or shorted battery. Equipments L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and The LTC4000-1 is available in a low profile 28-lead PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the 4mm 5mm QFN and SSOP packages. property of their respective owners. Typical a T 10.8V at 10A Charger for Three LiFePO Cells with a Solar Panel Input 4 Solar Panel Input Regulation, Si7135DP LT3845A V OUT SOLAR PANEL INPUT IN OUT Achieves Max Power Point 12V, 15A V C <60V OPEN 5m 100F to Greater than 98% CIRCUIT VOLTAGE 1.15M 5m 17.6V PEAK 14.7k 20 47nF POWER VOLTAGE T = 25C A ITH CC IID IGATE CSP CSN 18 BGATE Si7135DP BAT 16 CLN OFB IN 127k LTC4000-1 1F 14 332k FBG V 133k BAT IFB 98% TO 95% PEAK POWER 10.8V FLOAT BFB 12 20k 10A MAX CHARGE 3V 1.13M 100% TO 98% PEAK POWER CURRENT NTC 10 10k IIMON TMR CL CX GND BIAS 3-CELL LiFePO 4 1 2 3 4 5 6 7 8 9 10 10k BATTERY PACK CHARGER OUTPUT CURRENT: I (A) RCS 10nF 24.9k 22.1k 40001 TA01b 0.1F 1F 40001 TA01a 40001fa 1 For more information www.linear.com/LTC4001-1 INPUT REGULATION VOLTAGE: V (V) INREG ion pplica ions pplica ion uresLTC4000-1 a T e Maxi Mu M r a T (Note 1) IN, CLN, IID, CSP, CSN, BAT ....................... 0.3V to 62V IBMON ..................................0.3V to Min (V , V ) BIAS CSP IN-CLN, CSP-CSN ............................................1V to 1V ITH ............................................................... 0.3V to 6V OFB, BFB, FBG ........................................... 0.3V to 62V CHRG, FLT, RST .......................................... 0.3V to 62V FBG ............................................................1mA to 2mA CHRG, FLT, RST ..........................................1mA to 2mA IGATE ...........Max (V , V ) 10V to Max (V , V ) Operating Junction Temperature Range IID CSP IID CSP BGATE .......Max (V , V ) 10V to Max (V , V ) (Note 2) ................................................................. 125C BAT CSN BAT CSN ENC, CX, NTC, VM ...................................0.3V to V Lead Temperature (Soldering, 10 sec) BIAS IFB, CL, TMR, IIMON, CC .........................0.3V to V SSOP Package ..................................................300C BIAS BIAS .............................................0.3V to Min (6V, V ) Storage Temperature Range .................. 65C to 150C IN p c F T TOP VIEW TOP VIEW 1 IFB ENC 28 2 IIMON IBMON 27 28 27 26 25 24 23 3 RST CX 26 VM 1 22 IGATE 4 VM CL 25 RST 2 21 OFB 5 GND TMR 24 IIMON 3 20 CSP 6 IN GND 23 IFB 4 19 CSN 29 7 CLN FLT 22 GND ENC 5 18 BGATE 8 CC CHRG 21 IBMON 6 17 BAT 9 ITH BIAS 20 CX 7 16 BFB 10 IID NTC 19 CL 8 15 FBG 11 IGATE FBG 18 9 10 11 12 13 14 12 OFB BFB 17 13 CSP BAT 16 UFD PACKAGE 14 CSN BGATE 15 28-LEAD (4mm 5mm) PLASTIC QFN T = 125C, = 43C/W, = 4C/W GN PACKAGE JMAX JA JC EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB 28-LEAD PLASTIC SSOP T = 125C, = 80C/W, = 25C/W JMAX JA JC o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4000EUFD-1 PBF LTC4000EUFD-1 TRPBF 40001 28-Lead (4mm 5mm) Plastic QFN 40C to 125C LTC4000IUFD-1 PBF LTC4000IUFD-1 TRPBF 40001 40C to 125C 28-Lead (4mm 5mm) Plastic QFN LTC4000EGN-1 PBF LTC4000EGN-1 TRPBF LTC4000GN-1 28-Lead Plastic SSOP 40C to 125C LTC4000IGN-1 PBF LTC4000IGN-1 TRPBF LTC4000GN-1 28-Lead Plastic SSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: