LTC4015_15 Datasheet, PDF (12/76 Pages) Linear Technology – Multichemistry Buck Battery Charger Controller with Digital Telemetry System

LTC4015
Typical Performance Characteristics
Start-Up from 24V V_IN Hot Plug,
I_CHARGE = 8A (R_SNSB = 0.004Ω)
VIN
5V/DIV
VBAT
5V/DIV
IBAT
5A/DIV
IIN
5A/DIV
IBAT
200µs/DIV
VIN
VBAT
IIN
4015 G19
MPPT Algorithm Using UVCL DAC
Sweep to Find MPP
VIN
5V/DIV
V_IN, NO
LOAD = 25V
UVCL DAC
SWEEP
V_IN , AT MAX I_CHARGE
FOUND DURING UVCL
DAC SWEEP
VBAT
5V/DIV _VBAT
I_CHARGE
2A/DIV
MAXIMUM I_CHARGE FOUND
DURING UVCL DAC SWEEP
400ms/DIV
4015 G21
V_IN SOURCE IMPEDANCE = 4.4Ω
Ship Mode Battery Discharge
Current vs Battery Voltage
35
30
25
20
T = 125°C
15
T = 60°C
T = 25°C
10
T = –45°C
5
0
0 5 10 15 20 25 30 35
BATTERY VOLTAGE (V)
4015 G20
Coulomb Counter Accuracy vs
V_CSP–CSN
0.5%
0.0%
–0.5%
–1.0%
–1.5%
–2.0%
–2.5%
3.0%
QC ERROR
3.5%
0
5 10 15 20 25 30 35
V_CSP – V_CSN (mV)
4015 G24
4015f
12
For more information www.linear.com/LTC4015