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Default is 5 sec. 

UPS_HARDOFF_TOUT[s] 

After UPS_VBAT_UVP_OFF_TOUT 
passed motherboard is signaled to shut 
down. The UPS will wait this period so 
that the Motherboard can shut down 
gracefully, than cut power and enter deep 
sleep. This period should not be too long 
to prevent battery drain. 
Default is 60 sec. 

UPS_SWITCHOVER_VBAT_TOUT[ms]  After UPS switches to battery, can switch 

back to Vin only after this time elapses. 
Default is 1000ms. 

UPS_SWITCHOVER_VIN_TOUT[ms]  

After UPS switches to input, can switch 
back to battery only after this time 
elapses. 
Default is 1ms. 

DCHG_IMAX[mA] 

Max allowed discharge current. In case 
discharge current exceeds this threshold 
shutdown will be initiated. 
Default is 10000 mA. 

CAPACITY[mAh] 

Battery Capacity. 
Default 7000mAh. 

CHG_BAT_TYPE 

The battery chemistry to be charged. 
0- PbSO4 (float charge is applied) 
1- LiFePO4 (float charge is not applied) 
2-LiPO(float charge is not applied) 
Other (float charge is not applied) 
Default is 0. 

CHG_VCOND[V] 

Conditioning/Pre-charge voltage. Charge 
current is limited to CHG_ICOND until cell 
voltage exceeds this value and for at least 
CHG_TCOND time . 
Default is 11.2V. 

CHG_ICOND[mA] 

Conditioning/Precharge current. Charge 
current is limited to this value until cell 
voltage exceeds CHG_VCOND value and 
for at least CHG_TCOND time . 
Default is 100mA. 

CHG_TCOND [s] 
  

Conditioning/Precharge time. Charge 
current is limited to  CHG_ICOND value 
until cell voltage exceeds CHG_VCOND 
value and it is applied during this time. 
Default is 30 sec. 

CHG_IBULK[mA] 

Fast charge current limit (constant current 
mode) 
Default is 1750mA. 

CHG_BULK_STOP_VOLTAGE[V/cell] 

Maximum allowed bulk charge 

Summary of Contents for Open-UPS

Page 1: ...ruptible power supply The OPENUPS was designed to provide user specified regulated power output from a wide input voltage battery backup multi chemistry charging and cell balancing in a single PCBA Op...

Page 2: ...ENUPS Connection diagram Power Input Output Connectors J1 Input voltage 4pin mini FIT JR J4 Battery positive and Battery negative 2 pin mini FIT JR J3 Output voltage 4 pin mini FIT JR Balancing header...

Page 3: ...isconnect USB cable to shut down settings will be permanently saved Warning Improper configuration ex wrong under voltage over voltage reverse polarity can lead to battery damage or your system damage...

Page 4: ...Connect a proper input voltage source to the J1 connector If input voltage is present configurable by thresholds openUPS will enable the proper power path and energy will be flowing from input to outp...

Page 5: ...main LED s 500msec ON 2 5 sec OFF System is running on battery All LEDS OFF Unit is in Deep sleep mode consuming very little power MCU is not powered Can be waked up by shorting J8 or if input voltage...

Page 6: ...5 max depending on load V in and V out Input connectors Mini Fit JR Output Connector Mini Fit JR Output Input Rail Output Current buck boost converter Maximum input current 6A Peak Input current 10A 3...

Page 7: ...IN_MIN_START V If input voltage is above this threshold the UPS will start and take power from the input Default is 11V UPS_VIN_MIN_STOP V If input voltage is below this threshold the UPS will try to...

Page 8: ...mAh Battery Capacity Default 7000mAh CHG_BAT_TYPE The battery chemistry to be charged 0 PbSO4 float charge is applied 1 LiFePO4 float charge is not applied 2 LiPO float charge is not applied Other fl...

Page 9: ...s 290mA CHG_IFLOAT Charge current limit in float charge mode for PbSO4 batteries Default is 100mA CHG_GLOBAL_TOUT Global charge timeout Default is 1260 minute CHG_TOPPING_TIMER For Lithium based batte...

Page 10: ...NOFF_TOUT ms The power switch on the motherboard if connected will be shorted this period to turn the Motherboard ON or OFF Default is 500ms POUT_LO W Output power low threshold for motherboard alive...

Page 11: ...or initial 50 fuel gauge estimation Default is 12 3V OCV_SOC75 Open Circuit Voltage State Of Charge detection for initial 75 fuel gauge estimation Default is 12 6V OCV_SOC100 Open Circuit Voltage Stat...

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