October 17, 2019

24VAC to adjustable VDC 5 Amp AC/DC Converters with user set output between 1V and 18V

Tiny switchmode 24VAC / 5A power supply offers much higher efficiency and lower ripple than the linear versions. The biggest application of these is to power 3.3V, 5V, 8.4V, 9V, 10V, 12V, 14V, 15V, 16V devices in 24VAC installations.

	Quantity	1-9	10-49	50-99	100-199	200+
PST-AC24DC-ADJ User adjustable output		$28.50	$25.90	$23.60	$21.50	$19.10
PST-AC24DC5 5V output set at factory		$28.50	$25.90	$23.60	$21.50	$19.10

PST-AC24DCADJ
Input voltage AC	24VAC nominal	10VAC to 28VAC
Input voltage range	Input voltage must be higher than the output voltage. Input voltage range 8VAC-30VAC
Input voltage DC	Also operates on DC voltage if desired	10VDC to 40VDC
Output voltage	Adjustable between 1VDC and 18VDC
Output voltage adjustment	Voltage adjustment is through a multi-turn trim pot
Output Current	Depends on the output voltage, see table below, up to 36W
Input Frequency	50Hz, 60Hz	48 Hz to 65 Hz
Voltage Accuracy	±3%	at 0.2A load
Switchmode frequency	150kHZ
Load regulation	<1.2% over the output current range from 0.2 to 1.5A
Protections	Short circuit protect, current limit protection
Operating Temperature	-40°C to +80°C
Storage Temperature	-50°C to +108°C
Thermal Shutdown	135°C internal temperature
Connection	Wire leads, input and output
DC input	When using a direct current input, connect the plus and minus to the input terminals, it doesn't mattery which is the plus or minus, since we put a full bridge rectifier on the input, which will sort it correctly.
Wire gauge	18 AWG
Weight	2.8 oz., 80 grams
Dimensions	38 x 85 x 23 mm
Warranty	1 year

The following table gives a snapshot of a few voltages and output currents that gives an idea of the capabilities. The converter is designed to use 24VAC input, but can be operated at lower input voltages depending on the output voltage and current:

Output Voltage	Current	RMS Ripple*	Minimum input voltage	Tested input voltage
1 Volt	4A	7mV	10VAC	10VAC-40VAC
2V	7A	9mV	10VAC	10VAC-40VAC
3.3V	7A	9mV	10.5VAC	10VAC-40VAC
5V	0.8A		8VAC	8VAC-40VAC
5V	1.1A		9VAC	9VAC-40VAC
5V	1.6A		10VAC	10VAC-40VAC
5V	2.5A		11.5VAC	11.5VAC-40VAC
5V	5A		15.5VAC	15.5VAC-40VAC
6V	2A	50mV	10.5VAC	10.5VAC-40VAC
6V	5A		17.5 VAC	17.5VAC-40VAC
8V	2A		12VAC	12VAC-40VAC
8V	4A		16VAC	16VAC-40VAC
10V	1A		12VAC	12VAC-40VAC
10V	2A		15VAC	15VAC-40VAC
10V	3A		17VAC	17VAC-40VAC
10V	5A		20VAC	20VAC-40VAC
12V	1A		14VAC	14VAC-40VAC
12V	2A		16VAC	16VAC-40VAC
12V	3A	47mV	19VAC	24VAC-40VAC
14V	3.5A	50mV	22VAC	24VAC-40VAC
15V	3A		24VAC	24VAC-40VAC
16V	3A		24VAC	24VAC-40VAC
18V	3A		24VAC	24VAC-40VAC

* 50/60Hz ripple will go down as the current goes down, as it is due to the size of the input capacitors.

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