0.75-4.5V Adjustable Output DC-DC Power Supply, 9-32V Ultra-Wide Input, 3A Output
The pt1-OKIT3W32-4V5max is a robust and stable power supply providing four outputs, adjustable from 0.75V to 4.5V, at a maximum of 3A. The board is built around a Murata OKI-T/3-W32 DC-DC switching (buck) converter, which does not require a heat sink. The input voltage can be anywhere between 9V and 32V, supplied through the screw connector or the barrel jack connector.
The module features an on-board fuse, protecting the circuit against sustained input reversal. The power output is protected against short circuits and over-temperature. The converter will automatically restart after the short circuit condition is removed. The circuit has added some translator logic to provide a (positive) logic ENABLE signal (e.g., 3.3/5V).
Features
- 9-32V ultra-wide input, power provided through screw or barrel jack connector
- four outputs, adjustable from 0.75v to 4.5V, at a maximum of 3A in total
- built around Murata OKI-T/3-W32 DC-DC switching (buck) converter
- very high efficiency, not requiring any heat sinks
- protected against sustained input reversal through an on-board fuse
- protected against short circuits and over-temperature
- automatic restart after a short circuit
- (positive) logic ENABLE signal (e.g., 3.3/5V)
- all based on robust through-hole components (except for the OKI-T/3-W3 converter)
- the board is standing on four brass standoffs, allowing you to place it on a working table or integrate it into a larger assembly
- board size: 52.75×34.00mm; bolts: 46.75×28.00mm (M2.5)
- high-quality PCBs designed in KiCad and produced by Aisler (Germany), PCBWay (China), and OSH Park (USA)
- board comes fully assembled and tested
- power cables available
NOTE: the full output voltage range runs from about 0.75V to 4.5V; if you need a more limited range (to protect the hardware you will be connecting to this module), select one of the other (more restricted) ranges
NOTE: the module requires a different fuse depending on the input voltage (2A for ~12V input, 1A for ~24V input); make sure you select the right module for your application
NOTE: the module will only start when a high logic ENABLE signal is provided; if you need a module that is always on, select the type without the ENABLE signal logic
Usage
I’ve created this board as a low-voltage power supply for my LED applications (often based on the TI TLC5947 constant current LED driver) and to feed the filaments of the VFD display tubes I use in my projects.
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