V (V) OUT LTC4000 High Voltage High Current Controller for Battery Charging and Power Management Fea T Descrip T n Complete High Performance Battery Charger When The LTC 4000 is a high voltage, high performance controller Paired with a DC/DC Converter that converts many externally compensated DC/DC power n Wide Input and Output Voltage Range: 3V to 60V supplies into full-featured battery chargers. n Input Ideal Diode for Low Loss Reverse Blocking Features of the LTC4000s battery charger include: accurate and Load Sharing (0.25%) programmable float voltage, selectable timer or n Output Ideal Diode for Low Loss PowerPath and current termination, temperature qualified charging using Load Sharing with the Battery an NTC thermistor, automatic recharge, C/10 trickle charge n Instant-On Operation with Heavily Discharged for deeply discharged cells, bad battery detection and Battery status indicator outputs. The battery charger also includes n Programmable Input and Charge Current: precision current sensing that allows lower sense voltages 1% Accuracy for high current applications. n 0.25% Accurate Programmable Float Voltage n The LTC4000 supports intelligent PowerPath control. An Programmable C/X or Timer Based Charge external PFET provides low loss reverse current protec- Termination n tion. Another external PFET provides low loss charging NTC Input for Temperature Qualified Charging n or discharging of the battery. This second PFET also 28-Lead 4mm 5mm QFN or SSOP Packages facilitates an instant-on feature that provides immediate downstream system power even when connected to a a T heavily discharged or short faulted battery. n High Power Battery Charger Systems The LTC4000 is available in a low profile 28-lead 4mm n High Performance Portable Instruments 5mm QFN and SSOP packages. n Industrial Battery Equipped Devices L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Notebook/Subnotebook Computers PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T 48V to 10.8V at 10A Buck Converter Charger for Three LiFePO Cells Charge Current and V Profile 4 OUT vs V During a Charge Cycle BAT Si7135DP LT3845A V OUT 15V TO 60V IN OUT 12V, 15A V SHDN 12 11 C 5m 100F 1.15M 5m I CHARGE V OUT 14.7k 47nF 10 10.5 ITH CC IID IGATE CSP RST CSN 8 10 V OUT CLN BGATE Si7135DP IN 6 9.5 BAT 1F 1.10M OFB 4 9 127k VM LTC4000 FBG 100k 3.0V ENC 2 8.5 V I CHARGE CHRG 133k BAT 10.8V FLOAT FLT BFB 10A MAX CHARGE 0 8 1.13M IIMON CURRENT 6 7 8 9 10 11 12 NTC 10nF IBMON V (V) BAT 4000 TA01b 10nF 10k TMR CL CX GND BIAS 3-CELL LiFePO 4 10k BATTERY PACK 24.9k 22.1k 0.1F 1F 4000 TA01a NTHS0603 N02N1002J 4000fb 1 For more information www.linear.com/LTC4000 I (A) CHARGE ion pplica ions pplica ion uresLTC4000 a T e Maxi Mu M r a T (Note 1) IN, CLN, IID, CSP, CSN, BAT ....................... 0.3V to 62V BIAS .............................................0.3V to Min (6V, V ) IN IN-CLN, CSP-CSN ............................................1V to 1V IBMON ..................................0.3V to Min (V , V ) BIAS CSP OFB, BFB, FBG ........................................... 0.3V to 62V ITH ............................................................... 0.3V to 6V FBG ............................................................1mA to 2mA CHRG, FLT, RST .......................................... 0.3V to 62V IGATE ...........Max (V , V ) 10V to Max (V , V ) CHRG, FLT, RST ..........................................1mA to 2mA IID CSP IID CSP BGATE .......Max (V , V ) 10V to Max (V , V ) Operating Junction Temperature Range BAT CSN BAT CSN ENC, CX, NTC, VM ...................................0.3V to V (Note 2) ................................................................. 125C BIAS IL, CL, TMR, IIMON, CC ...........................0.3V to V Storage Temperature Range .................. 65C to 150C BIAS p c F T TOP VIEW TOP VIEW ENC 1 28 IL IBMON 2 27 IIMON 28 27 26 25 24 23 CX 3 26 RST VM 1 22 IGATE CL 4 25 VM RST 2 21 OFB TMR 5 24 GND IIMON 3 20 CSP GND 6 23 IN IL 4 19 CSN 29 FLT 7 22 CLN GND ENC 5 18 BGATE CHRG 8 21 CC IBMON 6 17 BAT BIAS 9 20 ITH CX 7 16 BFB NTC 10 19 IID CL 8 15 FBG FBG 11 18 IGATE 9 10 11 12 13 14 BFB 12 17 OFB BAT 13 16 CSP UFD PACKAGE BGATE 14 15 CSN 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 PBF LTC4000EUFD TRPBF 4000 28-Lead (4mm 5mm) Plastic QFN 40C to 125C LTC4000IUFD PBF LTC4000IUFD TRPBF 4000 40C to 125C 28-Lead (4mm 5mm) Plastic QFN LTC4000EGN PBF LTC4000EGN TRPBF LTC4000GN 28-Lead Plastic SSOP 40C to 125C LTC4000IGN PBF LTC4000IGN TRPBF LTC4000GN 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: