12V Ups Module

DC 12V Ups Module

18650 3.7V Lion Battery Uninterruptible Emergency Power Supply Battery Automatic Selection Load Shutdown Preventing Protection Board

A 2 color LED does not come in the package.
Reverse connection of the supply, battery or load causes permanent damage to the product.

     The 12V Ups Module is a small uninterruptible power board that works with a single 3.7V lithium cell (such as an 18650). A DC 5V - 12V supply is connected to its input; with this supply the board charges the connected cell up to 4.2V and boosts the cell voltage to a stable DC 12V at the output. When the mains power fails, the load keeps running from the battery; when the power returns, the board recharges the battery.

     Because the battery is permanently connected to the boost converter that produces the output, there is no switchover moment between mains and battery; as long as the load stays within the module limits, the output voltage does not drop at the moment of an outage and a router or camera does not restart. With jumper JP1 shorted the output is 12V, with JP1 open it is 9V. Jumper JP2 selects the charge current: about 0.5A when open, about 1A when shorted.

     The board measures 50mm x 20mm and weighs 5gr; the input (IN+ / IN-), battery (B+ / B-) and output (OUT+ / OUT-) connections are solder pads. If a common anode red-green 2 color LED is fitted to the 3-pin LED connection at the input, the charge and load status can be monitored. The output gives at most 1A peak current; for continuous use about 0.6A or less is recommended.

Key features:

     Uninterrupted output: Since the battery feeds the boost converter all the time, there is no switchover time when the power fails; the 12V output continues from the battery without interruption.

     Selectable 9V / 12V output: 12V output with JP1 shorted, 9V with JP1 open; it can also be used with modems and cameras that run on 9V.

     Adjustable charge current: The charge current is set to 0.5A or 1A with JP2. Use 0.5A for small capacity cells and 1A for 18650 cells; the charge voltage is 4.2V.

     Status LED connection: The red LED shows the charge status (steady: charging, off: charge complete, flashing: no battery), the green LED shows that a load is connected to the output.

     Small and light board: With 50mm x 20mm x 6.3mm size and 5gr weight it fits inside a router, modem or camera enclosure.

Features:

• Product type: Single cell lithium battery 12V UPS (uninterruptible power) module
• Input voltage: DC 5V - 12V (max. 9V with JP1 open, 9V mode)
• Output voltage: DC 12V (JP1 shorted, default); DC 9V with JP1 open
• Output current: max. 1A (peak); about 0.6A or less recommended for continuous use
• Output power: max. 12W (peak)
• Battery type: 1 x 3.7V Li-ion / Li-Po cell (such as 18650), 1S
• Charge voltage: 4.2V
• Charge current: 0.5A (JP2 open, default); 1A with JP2 shorted
• Switchover time: none; the battery is permanently connected to the boost converter
• Connections: IN+ / IN- input, B+ / B- battery, OUT+ / OUT- output solder pads
• LED connection: 3-pin, for a common anode red-green 2 color LED (LED not included)
• Red LED: steady on: charging, off: charge complete, flashing: no battery connected
• Green LED: load connected to the output
• Reverse polarity protection: none; reverse connection permanently damages the module
• Operating temperature: about -20°C - 85°C (board); the operating and charging temperature limits of the lithium cell are narrower
• Color: Green PCB
• Dimensions: 50mm x 20mm x 6.3mm
• Weight: 5gr

Usage information:

• First connect the supply to the input and measure the output with a voltmeter before connecting a load; with JP1 shorted you should see 12V. Connect the battery to the B+ / B- pads last; keep the wires short and thick.
• Select the charge current with JP2 according to your battery: JP2 open (0.5A) for a small capacity cell or phone battery, JP2 shorted (1A) for an 18650 cell.
• If the output voltage drops when the load is connected, the load power exceeds the module limit or the power of the input source. For example, a 5V 1A source cannot feed a 12W load. Adding parallel capacitors at the output before connecting the load can be useful.
• For long term use, it is advisable not to exceed 2/3 of the stated maximum values. Chinese manufacturers often state maximum ratings as continuous ratings.

Areas of use:

•  Backup power for routers and wireless modems
•  Fiber modems (ONT) and network devices
•  IP cameras and security cameras
•  Alarm panels and sensors
•  Electronic door locks and card access systems
•  12V LED lighting and emergency lamps
•  Small 12V fans and ventilation
•  Uninterrupted supply for home automation devices and data loggers
•  Battery powered supply for portable 12V devices

Precautions:

•  Reverse connection of the supply, battery or load causes permanent damage to the product. Check the polarity before connecting.
•  Do not share the B- (battery negative) terminal with the input or output negative; the battery is connected only to the B+ / B- pads.
•  With JP1 open (9V), the input passes to the output through a diode; do not use a supply higher than 9V in 9V mode.
•  The inductor and board get hot under high load. Place the board slightly away from the battery in a ventilated spot; keep the continuous load below about 0.6A.
•  Backup time depends on battery capacity and load. Measure it with your own load by simulating a power outage before use.

Package contents:

•  1 x 12V Ups Module
•  Note: 18650 battery, battery holder and 2 color LED are not included in the package.