LTC4110 Battery Backup System Manager FEATURES DESCRIPTION n Complete Backup Battery Manager for Li-Ion/ The LTC 4110 is a complete single chip, high ef ciency, Polymer, Lead Acid, NiMH/NiCd Batteries and yback battery charge and discharge manager with auto- Super Capacitors matic switchover between the input supply and the backup n Charge and Discharge Battery with Voltages Above battery or super capacitor. The IC provides four modes of and Below the Input Supply Voltage operation: battery backup, battery charge, battery calibra- n No Heat Battery Calibration Discharge Using tion and shutdown. Battery backup and battery charge are System Load automatic standalone modes, while the optional calibration n Automatic Battery Backup with Input Supply mode requires a CPU host to communicate over an SMBus. Removal Using PowerPath Control During calibration the yback charger is used in reverse n Standalone for Li-Ion/Polymer, SLA, and Supercaps to discharge the battery with a programmable constant 2 n Optional SMBus/I C Support Allows Battery current into the system load eliminating heat generation. Capacity Calibration Operation with Host Three status outputs can be individually recon gured over n Over- and Under-Battery Voltage Protection the SMBus to become GPIOs. User programmable over- n Adjustable Battery Float Voltage discharge protection is provided. The SHDN pin isolates n Precision Charge Voltage 0.5% the battery to support shipping the product with a charged n Programmable Charge/Calibration Current Up to battery installed. 3A with 3% Accuracy Multiple LTC4110s can be combined to form a redundant n Optional Temperature Quali ed Charging battery backup system or increase the number of battery n Wide Backup Battery Supply Range: 2.7V to 19V packs to achieve longer backup run times. n Wide Input Supply Range: 4.5V to 19V n The LTC4110 is available in a low pro le (0.75mm), 38-pin 38-Lead (5mm 7mm) QFN Package 5mm 7mm QFN package. The QFN features an exposed metal die mount pad for optimum thermal performance. APPLICATIONS L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their n Backup Battery Systems respective owners. n Server Memory Backup n Medical Equipment n High Reliability Systems TYPICAL APPLICATION Battery Backup System Manager Server Backup System (In Backup Mode) SYSTEM LOAD BACKUP LOAD (DCOUT) SYSTEM LOAD CURRENT FLOW (DC/DC, ETC.) DCIN 0V LTC4110 BATTERY BACKUP LOAD OFF ON ON BACKUP (MEMORY, ETC.) SYSTEM MANAGER CURRENT FLOW BATTERY HOST CPU BATTERY INID BATID 2 I C BUS UVLO CHGFET LTC4110 DCDIV 4110 TA01b SET POINT DCHFET 4110 F01 4110fb 1LTC4110 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW DCIN, BAT, DCOUT, DCDIV, SHDN to GND .......................................................0.3V to 20V Input Voltage (CLP, CLN) ...............0.3V to DCIN + 0.3V 38 37 36 35 34 33 32 DCIN 1 31 BAT Input Voltage (CSP, CSN) ................0.3V to BAT + 0.3V CLN 2 30 SELC Input Voltage CLP I 3 29 SENSE (GPIO1, GPIO2, GPIO3, SELC, SELA, TYPE, V , CHG ACPDLY 4 28 SGND THA, THB, I , ACPDLY, SDA, SCL) ....0.3V to 7V SENSE DCDIV 5 27 CSN Input Voltage (V , V ) .......................0.3V to 1.35V CAL DIS SHDN 6 26 CSP 39 Output Voltage SDA 7 25 I TH (ACPb, GPIO1, GPIO2, GPIO3) ................0.3V to 7V SCL I 8 24 CHG GPI01 9 23 I CLP-CLN, CSP-CSN ..................................................1V CAL GPI02 10 22 I PCC Operating Temperature Range (Note 2)....40C to 85C GPI03 11 21 THB Junction Temperature (Note 3) ............................. 105C SELA 12 20 THA Storage Temperature Range 13 14 15 16 17 18 19 QFN Package ......................................65C to 125C UHF PACKAGE 38-LEAD (5mm 7mm) PLASTIC QFNs T = 100C, = 34C/W JMAX JA EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4110EUHF PBF LTC4110EUHF TRPBF 4110 40C to 85C 38-Lead (5mm 7mm) Plastic QFN LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4110EUHF LTC4110EUHF TR 4110 40C to 85C 38-Lead (5mm 7mm) Plastic QFN Consult LTC Marketing for parts speci ed with wider operating temperature ranges. For more information on lead free part marking, go to: