Analog Devices DC2374B Demo Manual

DESCRIPTION
Demonstration circuit 2374B is a multi-chemistry battery
charger with maximum power point tracking (MPPT)
featuring the LTC 4013. The LTC4013 has 2 stage CC/CV
®
charge cycles, 3 stage and 4 stage lead acid and Li-Ion
battery algorithms.
The DC2374B is set up to operate from a 21.5V to 35V
supply or from a solar panel and charges a six cell lead
acid battery at 5A. There are optional input and output
capacitors plus large inductor pads and parallel top and
bottom FET pads to allow high power charging.
The LTC4013 is a 60V controller which makes it suitable
for large battery stacks with up to a 60V supply or solar
panel input. An MPPT burst mode feature allows the device
to efficiently charge in low light levels. Since the LTC4013
PERFORMANCE SUMMARY
PARAMETER
Input Supply Range
Battery Float Voltage (V )
FLOAT
Battery Absorption Voltage (V
ABS
Battery Equalization Voltage (V
EQ
Recharge Voltage (V )
RECHRG
Low Battery (V )
LB
MPPT Maximum Power Voltage (V
Circuit Voltage (V ) Ratio
OC
FBOC to DCIN Attenuation Ratio
Multi-Chemistry Battery Charger
Specifications are at T
CONDITIONS
ENABLE (JP1) = UVLO
ENABLE (JP1) = ON, MPPT (JP2) = ON
MODE1 (JP4) = HI, MODE2 (JP3) = LO
MODE1 (JP4) = MID, MODE2 (JP3) = LO
MODE1 (JP4) = HI, MODE2 (JP3) = MID
MODE1 (JP4) = MID, MODE2 (JP3) = MID
) MODE1 (JP4) = HI, MODE2 (JP3) = LO
MODE1 (JP4) = MID, MODE2 (JP3) = LO
) MODE1 (JP4) = HI, MODE2 (JP3) = HI, TIMER (JP6) = CAP
MODE1 (JP4) = MID, MODE2 (JP3) = HI, TIMER (JP6) = CAP
MODE1 (JP4) = HI, MODE2 (JP3) = MID
MODE1 (JP4) = MID, MODE2 (JP3) = MID
) to Open MPPT (JP2) = ON
PM
MPPT (JP2) = ON
DEMO MANUAL DC2374B
60V Synchronous Buck
is a controller, the power train can be sized from 1A to
over 10A of charge current. The LTC4013 also has an NTC
temperature compensated float voltage to help increase
the battery life.
The operating frequency, charge voltage, low battery (LB)
voltage setting and timing are configurable with external
resistors and a capacitor. The different charging algorithms
are set by two tri-state mode pins and the TIMER pin as
shown in Table 1.
Refer to the LTC4013 data sheet for more details on the
electrical and timing specifications.
Design files for this circuit board are available.
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= 25°C
A
LTC4013EUFD
MIN TYP MAX UNITS
21.5 24 35
5 35
13.6
13.2
14.2
14.4
14.2
14.4
16
15.6
13.77
13.77
10.4
83.3
6.9
V
V
V
V
V
V
V
V
V
V
V
V
V
%
%
Rev. 0
1