Datasheet LTC4015 (Analog Devices) - 6

LTC4015
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. (Note 2), DVCC = 3.3V, UVCLFB = 1.5; CELLS1 = INTVCC; EQ, MPPT, CELLS0, CELLS2, CHEM0, CHEM1 = 0; RT = 95.3k; RCCREF = 301k, RNTCBIAS = RNTC = 10k; BATSENS = CSN = CSP; DRVCC = INTVCC; SYS = CLP = CLN. Conditions: Charging; VIN = 12V, SYS = 12V, BATSENS = 7.4V …..Battery Only; VIN = 0V, SYS = 8.4V, BATSENS = 8.4V SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS LiFePO4 Battery Charger LiFePO4, Programmable, CHEM1,CHEM0 = [LH] (Note 9)
LiFePO4 Charge Voltage Max DAC setting Code 11111 (Note 11) 3.8 V/Cell LiFePO4 Charge Voltage Min DAC setting Code 00000 (Note 11) 3.4125 V/Cell LiFePO4 Charge Voltage DAC LSB 12.5 mV LiFePO4 Recharge Voltage POR Value I2C Programmable 3.35 V/Cell VLiFePO4-C/x Charge Termination C/x Threshold VCSP-CSN (I2C Programmable) 3.2 mV
LiFePO4 Fixed Standard Charge, Fixed Fast Charge, CHEM1, CHEM0 = [ZH,HZ] (Note 9)
LiFePO4 Fixed Fast Charge Absorb Voltage CHEM1, CHEM0 = [HZ] Only (Note 11) 3.8 V/Cell LiFePO4 Charge Voltage CHEM1, CHEM0 = [ZH,HZ] (Note 11) 3.6 V/Cell LiFePO4 Recharge Voltage CHEM1, CHEM0 = [ZH,HZ] (Note 11) 3.35 V/Cell
LiFePO4, CHEM1, CHEM0 = [LH,HZ,ZH] (Note 9)
Max Charge Time 18.2 hrs VLiFePO4-T(CV) Charge Termination Time 1 hrs
Lead-Acid Battery Charger Lead-Acid Fixed, CHEM1, CHEM0 = [ZZ] (Note 9)
VLead_Acid_Vcharge Lead-Acid VCHARGE, Equalization (Note 11) 2.6 V/Cell Lead-Acid VCHARGE, Absorption (Note 11) 2.4 V/Cell Lead-Acid VCHARGE, CV (Note 11) 2.2 V/Cell Lead-Acid Temperature Compensation –3.65 mV/Cell/°C
Lead-Acid Programmable, CHEM1, CHEM0 = [HL] (Note 9)
VLead_Acid_Vcharge Lead-Acid VCHARGE DAC Maximum Code 111111 (Note 11) 2.6 V/Cell Lead-Acid VCHARGE DAC Minimum Code 000000 (Note 11) 2.0 V/Cell Lead-Acid VCHARGE DAC Resolution 9.5 mV Lead-Acid Temperature Comp Temperature Comp Enabled –3.65 mV/Cell/°C
Thermistor (NTC) BIAS
VNTCBIAS Applied NTC Bias Voltage Internally Switched to 1.2V 1.2 V INTC NTC Leakage Current –50 50 nA
SYSM5, CSPM5 Regulators
–5VVINM5 VSYS – VSYSM5, VCSP – VCSPM5 No Load 4.8 V
Power Path/Ideal Diode Controllers
VFTO Forward Turn-On Voltage 50 mV VFR Forward Regulation 15 mV VRTO Reverse Turn-Off –30 mV tIF(ON) INFET Turn-On Time INFET – VIN > 3V, CINFET = 3.3nF 550 µs tIF(OFF) INFET Turn-Off Time INFET – VIN < 1V, CINFET = 3.3nF 2 µs tOF(ON) OUTFET Turn-On Time VBAT – OUTFET > 3V, COUTFET = 3.3nF 2.3 µs tOF(OFF) OUTFET Turn-Off Time VBAT – OUTFET < 1V, COUTFET = 3.3nF 1.9 µs
Inductor Current Regulation
ILIM Cycle by Cycle Max Charge Current Note 5 l 47 52 57 mV/RSNSB IREV Reverse Inductor Current l 3.8 7.0 10 mV/RSNSB 4015fb 6 For more information www.linear.com/LTC4015 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Data Sheet Conventions Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram I2C Timing Diagram Operation Applications Information Register Description DETAILED Register Descriptions Typical Applications Package Description Revision History Typical Application Related Parts