April 17, 2023

Power Bank controller boards with 5V USB input and output and Li-ion charging

make your own power bank with 3-d printing

3-D printer files to make your own power bank

These are very adaptable power bank controllers which take 5V input, deliver 5V output, but charge a 4.2V (3.6V or 3.7V nominal) lithium ion or lithium polymer battery.

Possible applications are:

How to make a power bank with a lithium polymer or lithium ion cell, or multiple cells in parallel
Use it in your own device to control the battery charging and deliver 5V to your circuitry
Use it as a battery backup controller, 5 volts in and 5 volts out. If the power is interrupted the 5 volts is supplied by the battery through its DC converter
Use it as a lithium ion battery charger with 5V input

	Quantity	1-19	20-99	100-999	1000+
PST-MP149		$9.95	$8.50	$6.98	$6.30
PST-MP150		$9.95	$8.50	$6.98	$6.30

Specifications

Parameter	PST-MP149	PST-MP150	Comments
3-D Design Files	MP149 Power Bank 3D Design file in IGS, PRT, SLDPRT, STEP, and STL	MP150 Power Bank 3D Design file in IGS, PRT, SLDPRT, STEP, and STL
Charging
Charging Current	1.8-2.2A	1.8-2.2A
Charge termination current	0.3-0.06A	0.3-0.06A
CV Charging voltage	4.2V ±0.05V	4.2V ±0.05V
Overcharge protection	4.35V maximum	4.35V maximum	Added internal protection
Over discharge protection	2.5 ± 0.075V	2.5 ± 0.075V
Charging Temperature	<70°C	<70°C
Discharging Temperature	<85°C	<85°C
Output
USB output no-load	5.2V ± 0.15V	5.2V ± 0.15V
USB output 2A load	4.9V ± 0.15V	4.9V ± 0.15V
Output ripple	< 300mV p-p	< 300mV p-p
Auto-off	Turns off automatically in 5 seconds if there is no load present (between 5V and ground). 50mA is sufficient.
UPS output minimum load	100 mA	100 mA	When the load drops below 100 mA the battery-saving function turns off the DC converter
Standby time	15 ± 2 seconds	15 ± 2 seconds	When the load drops below 100 mA the unit will stay on for 15 seconds watching for resumed current draw before turning off
UPS 5V maximum output current	2.5A ± 0.3A	2.6A ± 0.3A
USB output short circuit protection	Auto recover	Auto recover
Circuit self-power	<100 micro amps	<100 micro amps
USB Output efficiency at 1A	>85%	>84%
USB Output efficiency at 2A	>82%	>82%
USB DC converter cutoff voltage	3.0V ± 0.2V	3.0V ± 0.2V	The battery should not drop below 3V due to the DC converter cut-off
Button	Press once to turn on, hold for 2 seconds to turn off	Press once to turn on, hold for 2 seconds to turn off
LEDs	No LEDs	Gas gauge

	PST-MP149 bottom view
	PST-MP149 top view
	PST-MP149 bottom photo showing switch position
	PST-MP149 top photo showing USB connectors
	PST-MP150 drawing showing separate LED board, it plugs into the connector at the bottom right
	PST-MP150 top view
	PST-MP150 bottom view. The LED can be put on a cable to allow flexible positioning

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