LTC4015_15 Datasheet, PDF (6/76 Pages) Linear Technology – Multichemistry Buck Battery Charger Controller with Digital Telemetry System

LTC4015
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C. (Note 2), DV_CC = 3.3V, UVCLFB = 1.5; CELLS1 = INTV_CC; EQ,
MPPT, CELLS0, CELLS2, CHEM0, CHEM1 = 0; RT = 95.3k; R_CCREF = 301k, R_NTCBIAS = R_NTC = 10k; BATSENS = CSN = CSP; DRV_CC = INTV_CC;
SYS = CLP = CLN. Conditions: Charging; V_IN = 12V, SYS = 12V, BATSENS = 7.4V …..Battery Only; V_IN = 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)
LiFePO₄ Charge Voltage Min DAC setting Code 00000 (Note 11)
V_LiFePO4-C/x
LiFePO₄ Charge Voltage DAC LSB
LiFePO₄ Recharge Voltage
Charge Termination C/x Threshold
POR Value I²C Programmable
V_CSP-CSN (I²C Programmable)
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)
LiFePO₄ Charge Voltage
CHEM1, CHEM0 = [ZH,HZ] (Note 11)
LiFePO₄ Recharge Voltage
CHEM1, CHEM0 = [ZH,HZ] (Note 11)
LiFePO₄, CHEM1, CHEM0 = [LH,HZ,ZH] (Note 9)
Max Charge Time
3.8
3.4125
12.5
3.35
3.2
3.8
3.6
3.35
18.2
V/Cell
V/Cell
mV
V/Cell
mV
V/Cell
V/Cell
V/Cell
hrs
V_{LiFePO4-T(CV)}
Charge Termination Time
Lead-Acid Battery Charger
1
hrs
Lead-Acid Fixed, CHEM1, CHEM0 = [ZZ] (Note 9)
V_{Lead_Acid_Vcharge} Lead-Acid V_CHARGE, Equalization
Lead-Acid V_CHARGE, Absorption
Lead-Acid V_CHARGE, CV
Lead-Acid Temperature Compensation
(Note 11)
(Note 11)
(Note 11)
2.6
2.4
2.2
–3.65
V/Cell
V/Cell
V/Cell
mV/Cell/°C
Lead-Acid Programmable, CHEM1, CHEM0 = [HL] (Note 9)
V_{Lead_Acid_Vcharge} Lead-Acid V_CHARGE DAC Maximum
Lead-Acid V_CHARGE DAC Minimum
Lead-Acid V_CHARGE DAC Resolution
Lead-Acid Temperature Comp
Code 111111 (Note 11)
Code 000000 (Note 11)
Temperature Comp Enabled
2.6
2.0
9.5
–3.65
V/Cell
V/Cell
mV
mV/Cell/°C
Thermistor (NTC) BIAS
V_NTCBIAS
Applied NTC Bias Voltage
I_NTC
NTC Leakage Current
SYSM5, CSPM5 Regulators
Internally Switched to 1.2V
1.2
V
–50
50
nA
–5V_VINM5
V_SYS – V_SYSM5, V_CSP – V_CSPM5
Power Path/Ideal Diode Controllers
No Load
4.8
V
V_FTO
Forward Turn-On Voltage
V_FR
Forward Regulation
V_RTO
Reverse Turn-Off
t_IF(ON)
INFET Turn-On Time
t_IF(OFF)
INFET Turn-Off Time
t_OF(ON)
OUTFET Turn-On Time
t_OF(OFF)
OUTFET Turn-Off Time
Inductor Current Regulation
INFET – V_IN > 3V, C_INFET = 3.3nF
INFET – V_IN < 1V, C_INFET = 3.3nF
VBAT – OUTFET > 3V, C_OUTFET = 3.3nF
VBAT – OUTFET < 1V, C_OUTFET = 3.3nF
50
mV
15
mV
–30
mV
550
µs
2
µs
2.3
µs
1.9
µs
I_LIM
Cycle by Cycle Max Charge Current
Note 5
I_REV
Reverse Inductor Current
l 47
52
57 mV/R_SNSB
l 3.8
7.0
10 mV/R_SNSB
4015f
6
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