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| LTC4015_15 Datasheet, PDF (7/76 Pages) Linear Technology – Multichemistry Buck Battery Charger Controller with Digital Telemetry System | |||
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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 â¦..Battery Only; VIN = 0V, SYS = 8.4V, BATSENS = 8.4V
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP MAX
UNITS
Oscillator
fOSC
fMAX
fMIN
Gate Drivers
Switching Frequency
Maximum Programmable Frequency
Minimum Programmable Frequency
RT = 95.3k
RT = 47.5k
RT = 237k
l 475
500
525
kHz
1
MHz
200
kHz
RUP-TG
TG Pull-Up On-Resistance
RDOWN-TG
TG Pull-Down On-Resistance
RUP-BG
BG Pull-Up On-Resistance
RDOWN-BG
TG Pull-Down On-Resistance
tR-TG
TG 10% to 90% Rise Time
tF-TG
TG 90% to 10% Fall Time
tR-BG
BG 10% to 90% Rise Time
tF-BG
BG 90% to 10% Fall Time
tNO
Non-Overlap Time
tON(MIN)
Minimum On-Time
DCMAX
Maximum Duty Cycle
VC Error Amplifier
CLOAD = 3.3nF
CLOAD = 3.3nF
CLOAD = 3.3nF
CLOAD = 3.3nF
2.0
Ω
0.5
Ω
2.0
Ω
0.5
Ω
20
ns
10
ns
20
ns
10
ns
60
ns
140
ns
98.4
%
gm
Transconductance to VC pin
gm (VCSPâCSM) (Constant-Current)
gm (VBATSENS) (Constant-Voltage Lithium)
gm (VBATSENS) (Constant-Voltage LA)
2 Cell; (gm = 1.06 â3 ⢠2/(7 ⢠Cell Count)
6 Cell; (gm = 1.06 â3 ⢠3/(7 ⢠Cell Count)
gm (VUVCLFB) (Input Voltage Regulation)
gm (VCLPâCLM) (Input Current Limiting)
Telemetry A/D Measurement Subsystem, Battery Only Mode
4.10
mmho
0.15
mmho
0.08
mmho
1.06
mmho
4.10
mmho
VERR
Measurement Error (Note 6)
VIN = 1V
VIN = 35V
VSYS = 2.5V
VSYS = 3V
VBAT = 1.75V, 1 Cell Li-Ion
VBAT = 35V, 9 Cell Li-Ion
VCLPâCLN = 0mV
VCLPâCLN = 32mV
VCSPâCSN = 0mV
VCSPâCSN = 32mV
NTC/NTCBIAS = 50%, 75%
NTC/NTCBIAS = 5%
±100
mV
±1.5
%
±100
mV
±1.5
%
±50
mV
±1.5
%
±200
µV
±2.5
%
±200
µV
±2.5
%
±2
%
±3.5
%
4015f
For more information www.linear.com/LTC4015
7
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