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April 25, 2017

Design Example: Multi-output Battery Backup Power Supply Board

Universal input, multi-output battery back up power supply This universal input (90-280 VAC, 50/60 Hz) power supply board has 12 VDC, 5 VDC, 3.3 VDC, and 2.5VDC outputs, and charges a 12 volt lead acid battery which automatically switches in when the AC power is removed.

This is an expample of a custom product that we have developed. The last production run was in 2004, some of the components are now obsolete, so it cannot be manufactured according to the current design.

For DC DC converters from PowerStream click here: More DC/DC Converters

Custom design and manufacture of state-of-the-art battery chargers, UPS, and power supplies for OEMs in a hurry!

. Model : PST-DCUPS-30 Multiple output AC input DC power supply with battery backup, a DC UPS board level product.

Model Number PST-DCUPS30 Battery Backup Power Supply Board
Input Voltage Range 84-264 VAC 50/60 Hz
Output Voltages 12 volts DC
(varies between 14 and 10 volts during battery charge and discharge)
5 Volts DC Regulated 3.3 Volts DC Regulated 2.5 Volts DC Regulated
Peak Output Current 1 amp nominal, 2.5 Amps max under AC, 5 amps max under Battery power 1 Amp 3 Amps 1.2 Amps
 Peak Output Power 30 Watts peak 5 Watts 10 Watts 3 Watts
Remote control, Annunciation and data outputs TTL Signals for:
Remote "sleep" mode (all but 12 volt supply are cut off)
Remote turn back on
AC fail
Battery "should be replaced" alarm
Load Regulation ±3% over rated current except for the 12 volt output
Customizable The current for the different outputs can be increased if not all the outputs are used, the voltages can be changed to your requirements
Dimensions 5 x 7.75 x 1.75 inches (127 x 197 x 44 mm)
Connectors For table of connectors and pinouts click here
Recommended 12 volt battery For indoor use use any of the 12 volt batteries at /BB.htm
For Outdoor use the Hawker Cyclone may have a wider temperature range.

Connector Chart
Connector Mating Connector Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 Pin 11 Pin 12
J101 (AC) Molex 09-50-8053 AC-line AC-Neutral Chassis
J102 (Output) Molex 39-01-2125 AC-lost Battery Alarm +2.5 Volts +3.3 Volts +5 Volts Power Down (pulling this pin low turns on the outputs) Gnd Gnd Gnd Gnd Gnd +12 Volts keep alive
J103 (Battery) Molex 39-01-2025 Battery Negative Battery Positive                    

input +5 VDC at 1 amp +3.3 VDC at 3 amps. Also available from this board are 2.5 VDC at 1.2 Amps +12 VDC at 1 amp, AC failed signal--A TTL signal indicating that the AC power is down. Battery bad alarm--A TTL signal indicating that the battery should be replaced. External power down signal--shuts everything down but +12 VDC when activated by an external TTL signal. Also turns the supply on with a TTL signal. Size of board: 5 x 7.75 x 1.75 inches. the 1.75 inches can be negotiated down to 1.32 if necessary. Size of battery: The Hawker Cyclone 8 AH 12 Volt pack is 5.25 x 3.68 x 4.19 inches, and weighs 6.75 kg.


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Battery back-up power supply, multi-output 12 volts, 5 volts, 3.3 volts, and 2.5 volts

PowerStream Technology
1163 South 1680 West
Orem Utah 84058

Phone: 801-764-9060
Fax: 801-764-9061

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