LTC4015_15 Datasheet, PDF (4/76 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
V_IN
V_BAT
V_CHARGE(TOL)
Input Supply Voltage
Note 8
Battery Voltage
Note 8
Charge Voltage, Regulated Battery per Cell Li-Ion ,4.2V per Cell; LiFePO₄ 3.6V per
Tolerance, All Chemistries
Cell; Lead-Acid 2.2V per Cell
l 3.1
l
l –1.25
35
V
35
V
1.25
%
Regulated Battery Charge Current
Tolerance
Full-Scale V_CSP–CSN/R_SNSB
l –2.0
2.0
%
V_SYS
SYS Pin Voltage
Note 8
Quiescent Current I_Q = I_VIN + I_CLP + I_CLN + I_SYS + I_SW + I_CSP + I_CSN + I_BATSENS
l 3.05
35
V
Battery Discharge Current (No Input
Supply, Coulomb Counter Disabled)
Battery Only, Telemetry Inactive
l
Battery Only, Telemetry Active 1% Duty l
Cycle
112
325
µA
140
364
µA
Battery Only, Telemetry Active
Continuously
2.84
mA
I_Q, Charging
I_Q, Ship Mode
I_Vin
V_IN Pin Current
Charging, Switcher Suspended
3.00
mA
Charging, V_BAT > V_CHARGE (Note 7)
4.10
mA
Ship Mode (V_IN = 0)
l
5
40
µA
Battery Only (No Input Supply)
–200
200
nA
Charging
<140
µA
I_SYS
SYS Pin Current
Battery Only, Telemetry Off
Battery Only, Telemetry On
100
µA
2.75
mA
Charging, V_BAT > V_CHARGE (Note 7)
3.65
mA
V_{IN_DUVLO}
V_IN to V_BATSENS Differential Undervoltage Rising Threshold
(Must Be Satisfied for Charging)
Hysteresis
l 140
200
250
mV
100
mV
V_{IN_OVLO}
Input Overvoltage Lockout
(Inhibits Charger)
Rising Threshold
Hysteresis
l 37.7
38.6 39.5
V
1.4
V
Input Undervoltage Current Limit
V_UVCLFB
UVCLFB Pin Regulation Range
(8-Bit DAC)
UVCLFB Pin Regulation DAC LSB
V_UVCLFB Maximum Code 0xFF
V_UVCLFB Minimum Code 0x00
l 1188 1200 1212
mV
4.6875
mV
4.6875
mV
UVCLFB Pin Leakage Current
Input Current Limit
V_UVCLFB = 1.2V
l –100
100
nA
Regulated Input Current Limit Tolerance Full-Scale V_CLP–CLN/R_SNSI
l –2.0
2.0
%
I_CL
Input Current Limit Range
I_CL = (V_{CLP – CLN})/R_SNSI
0.5 – 32
mV/R_SNSI
Input Current Limit LSB Step Size
0.5
mV/R_SNSI
CLP Input Current
V_CLP = 12V, V_CLP–CLN = 32mV
45
µA
CLN Input Current
V_CLP = 12V, V_CLP–CLN = 32mV
–100
100
nA
CLP, CLN Common Mode Range
Note 8
4
35
V
4015f
4
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