LTC4013EUFD datasheet(5/14 Pages) LINER

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dc2374afa

DEMO MANUAL DC2374A

6. Set PS1 to 20V and then turn on.

7. Slowly increase PS1 until the STAT0 LED illuminates.

DCIN is now above the UVLO rising threshold.

NOTE. PS1 can be increased from this voltage up to 35V.

Make sure that the input voltage does not exceed 40V.

8. Observe that the battery charger current is only about

1A, 20%, and the voltage on the ISMON terminal

measures about 0.2VDC. This is because the battery

voltage is below the LB threshold. If the battery voltage

remains below low bat for 25 minutes then the charge

cycle is terminated.

9. Slowly increase PS2 until the battery current jumps up

to about 5A, full load. ISMON reads close to 1V. The

battery voltage is now above the low battery threshold.

10. SlowlyincreasePS2untilthebatterycurrentdecreases

to 4.5A. If the STAT0 LED is on and the STAT1 LED is

off then the battery voltage is now approaching the

absorption voltage and the charge timer has started.

The battery will charge for about 3.3hrs before switch-

ing to float mode.

11. When the LTC4013 switches to float mode, the charge

current will drop to 0A until the battery voltage is

decreased below 13.6V.

To observe equalization mode, follow steps 12 thru 18.

Otherwise skip to step 19.

NOTE: Equalization mode will not enable more than one

time during a power on event. If an equalization cycle has

already completed, power will need to be cycled in order

to run a second equalization cycle.

24V SUPPLY QUICK START PROCEDURE

12. Make sure PS1 is set above UVLO rising threshold and

set PS2 to about 12V.

13. Make sure JP6, the TIMER jumper, is still in the CAP

position. Set JP3, the MODE2 jumper, to the HI posi-

tion. The STAT0 LED should be on and the STAT1 LED

should be off. If not, power PS1 down, set JP3 to LO,

turn PS1 back on, then set JP3 back to HI.

14. Increase PS2 until the battery voltage approaches the

absorption voltage as done in step 10.

15. ContinueincreasingPS2untilthebatterycurrentdrops

below 500mA.

16. In about 3.33 hours the charge current will increase

to about 1A. This is equalization mode.

17. IncreasePS2untilthebatterycurrentstartstodecrease.

The battery voltage is approaching the equalization

voltage.

18. Afterabout25minutesinequalizationmodethecharge

current will return to about 0A until the battery voltage

is reduced below the float voltage of about 13.6V.

19. When done, turn off and disconnect all loads and

power supplies.

NOTE: To evaluate the MPPT function, see the MPPT Quick

Start Procedure section.

LTC4013EUFD Datasheet(PDF) 5 Page - Linear Technology

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