POWER LOSS (W) LTC4013 60V Synchronous Buck Multi-Chemistry Battery Charger FEATURES DESCRIPTION n Wide Input Voltage Range: 4.5V to 60V The LTC 4013 is a high voltage battery charger controller n Wide Battery Voltage Range: 0V to 60V that supports float, absorption and equalization lead-acid n Built-In Charge Algorithms for Lead-Acid and Li-Ion and constant-current/constant-voltage Li-Ion charging n 0.5% Float Voltage Accuracy algorithms. It is particularly well suited for charging a wide n 5% Charge Current Accuracy range of lead-acid batteries, including both vented and n Maximum Power Point Tracking Input Control sealed type. The LTC4013 also supports Li-Ion/Polymer, n NTC Temperature Compensated Float Voltage LiFePO , NiMH, NiCd and other battery types. 4 n Two Open Drain Status Pins Charging is performed with a high efficiency synchronous n Thermally Enhanced 28-Lead 4mm 5mm QFN buck (step-down) converter that uses external N-channel Package MOSFETs. Switching frequency is programmed with a resistor or synchronized with an external clock for use APPLICATIONS in multiphase applications. Charge current is set with an n Battery Backup for Lighting, UPS Systems, Security external sense resistor. Cameras, Computer Control Panels The device includes maximum power point tracking in- n Portable Medical Equipment put voltage regulation for limited power inputs such as n Solar-Powered Systems solar panels. Other features include user-programmable n Industrial Battery Charging absorption and equalization times, temperature-adjusted L, LT, LTC, LTM, Burst Mode. Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective regulation voltages and an external NFET isolation diode. owners. Protected by U.S. Patents, including 9246383. TYPICAL APPLICATION 15V-34V to 6 Cell Lead-Acid (12.6V) 5A Step-Down Battery Charger Efficiency and Power Loss vs Charge Current 15V-34V 97 2.5 EFFICIENCY 96 95 2.0 INFET VIN S V IN BST POWER LOSS 94 DCIN TG 93 1.5 ENAB SW 92 BG 91 1.0 MPPT 90 INTV 89 V = 24V 0.5 CC IN FBOC V = 13.8V BAT PGND 88 87 0 LTC4013 SENSE 0 1 2 3 4 5 CHARGE CURRENT (A) 4013 TA01a BAT INTV MODE1 CC BASED ON APPLICATION ON BACK PAGE MODE2 FB INTV CC SYNC NTC RNTC PINS NOT USED SGND IN THIS CIRCUIT RT TMR LB ITH STAT0 STAT1 ISMON CLKOUT 4013 TA01 4013f 1 For more information www.linear.com/LTC4013 EFFICIENCY (%)LTC4013 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW DCIN, V , VIN S, ENAB, STAT0, STAT1 .... 0.3V to 60V IN INFET ......................................................... 0.3V to 73V BST ........................................................... 0.3V to 66V 28 27 26 25 24 23 STAT0, STAT1 ..........................................................5mA INFET 1 22 TG SENSE, BAT ............................................... 0.3V to 60V DCIN 2 21 BST MPPT 3 20 SENSE SENSE-BAT ............................................... 0.3V to 0.3V FBOC 4 19 BAT 29 FBOC, MPPT, FB, MODE1, MODE2, SYNC, SGND ENAB 5 18 FB INTV , NTC ............................................ 0.3V to 6V CC ISMON 6 17 NTC TMR, LB, ITH ............................................... 0.3V to 3V STAT0 7 16 ITH Operating Junction Temperature Range STAT1 8 15 RT (Note 2) ............................................. 40C to 125C 9 10 11 12 13 14 Storage Temperature Range .................. 65C to 150C UFD PACKAGE 28-LEAD (4mm 5mm) PLASTIC QFN T = 125C, = 43C/W, = 3.4C/W JMAX JA JC EXPOSED PAD (PIN 29) IS SGND, MUST BE SOLDERED TO PCB ORDER INFORMATION