--- product_id: 43225075 title: "High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output" brand: "lm yn" price: "83.66 DT" currency: TND in_stock: true reviews_count: 8 category: "Lm Yn" url: https://www.desertcart.tn/products/43225075-high-voltage-power-supply-module-dc-dc-45-390v-adjustable store_origin: TN region: Tunisia --- # ±45-390V adjustable high voltage 40W continuous, 70W peak power output -40°C to +75°C wide operating temp High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output **Brand:** lm yn **Price:** 83.66 DT **Availability:** ✅ In Stock ## Summary > ⚡ Power your innovation with precision and safety — don’t get left in the dark! ## Quick Answers - **What is this?** High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output by lm yn - **How much does it cost?** 83.66 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/43225075-high-voltage-power-supply-module-dc-dc-45-390v-adjustable) ## Best For - lm yn enthusiasts ## Why This Product - Trusted lm yn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Power Handling:** Delivers a solid 40W continuous output with peaks up to 70W, perfect for demanding capacitor charging and electromagnetic applications. - • **Precision Voltage Control:** Continuously adjustable output from ±45V up to 390V (max 780V) lets you tailor power exactly to your project needs. - • **Compact & Efficient Design:** Small 60x50x22mm footprint with up to 88% conversion efficiency keeps your setup sleek and energy-smart. - • **Versatile Industrial Grade:** Operates reliably from -40°C to +75°C, making it ideal for professional environments and high-stress electrical projects. - • **Built-in Safety Protections:** Includes short-circuit, overcurrent, overvoltage, and reverse polarity protections to safeguard your investment and workspace. ## Overview This High-Voltage Power Supply Module is a compact, non-isolated DC-DC boost converter designed for professional electricians and advanced hobbyists. It accepts 10-32V DC input and outputs a finely adjustable ±45 to 390V (up to 780V max) at 40W continuous power, peaking at 70W. With built-in protections against short circuits, overcurrent, overvoltage, and reverse polarity, plus a wide operating temperature range (-40°C to +75°C), it’s engineered for demanding capacitor charging, electromagnetic gun power, and pressure testing applications. Its high efficiency (up to 88%) and small size make it a must-have for cutting-edge electrical projects where precision and safety are non-negotiable. ## Description Module nature: Non-isolated boost module. Input voltage: DC10-32V. Input current: 5A (MAX). Static operating current: 15mA (12V to 50V, the higher the output voltage will increase the quiescent current). Output voltage: ± 45-390V 780V continuously adjustable. Output power: 40W (peak 70W). Operating temperature: -40 ~ +75 ℃ (If the ambient temperature is high, please strengthen the heat). Operating frequency: 75KHz.Conversion efficiency: up to 88% (efficiency and input, output voltage, current, pressure related). Short-circuit protection: Yes (input 10A fuse, please do not directly short-circuit the output arc! Direct short-circuit arc may damage the rectifier device). Overcurrent protection: Yes (input current exceeds 4.5A, lower output voltage). Overvoltage protection: Yes (output voltage exceeds 410V, lower output voltage). Input reverse protection: Yes (not self-recovery, then anti-burning fuse, do not reverse.) Installation: 4 * 3mm screws. Module size: 60 * 50 * 22mm (length * width * height). Capacitance charging time measured data: 470uF: Fully charged to 390V for 2 seconds, 1000uF: Fully charged to 390V time 4 seconds, 2200uF: Fully charged to 390V time 8 seconds, 4700uF: Fully charged to 390V for 18 seconds. Applications: 1, capacitor charging, electromagnetic gun power. 2, for your electronic equipment, power supply, you can set the output voltage with your system voltage. 3, pressure test power supply. If you for any reason are not happy with any product supplied , please do not hesitate to contact us and we will do our best to solve your problem . Review: For me, worked great - I needed to subject high voltage vacuum tubes to gradually increasing DC voltage. It is called "re-forming" tubes and you do it for tubes that have sat on the shelf for a long time. I hooked this DC-DC convertor to a 30V DC source and reformed the tubes at 100VDC, 200VDC, 300VDC and 390VDC for hours each. Never got too hot (I limited the current with a resistor). Worked fine. Caution: there's a fair amount of noise on the output--it isn't hifi quality DC, so you might want to add choke- and/or capacitor-based filtering to smooth out the output. I didn't need that, hence the 5 starts. For the price it is tops. Review: Not useful for battery charging - I have had two fail, both ending with the 12v by-pass cap exploding quite violently (don't lean over the module when it is powered!). With the first setup, I connected the gnd-to-+V output to a battery bank at 197v, via a 10 ohm resistor for checking the current. Before connecting to the battery bank, the module +V voltage was set to 205v. The charge current started at 300 ma. I adjusted the pot to lower the voltage setting, and the charge current decreased as expected. When it was about 1.5v (i.e. 150 ma) all hell broke loose. The 10 ohm resistor turned brilliant yellow. Something on the bottom side of the board lit up. A second of two later the 470u cap across the 12v input exploded. The rectifier diode (US3M) in the +V side got so hot that the solder melted and it fell off. Thinking the battery bank power fed back through the +V circuit after the output diode shorted, I tried a second unit and added a 1N1007 (1000v) diode between the +V and the battery bank. The charging current started at 350 ma, then after a few seconds suddenly stopped. I quickly disconnected the 12v, then disconnected the battery bank. Then reconnected the 12v to check the +V and -V voltages. In a matter a few seconds the 470u cap exploded. (Again quite violently). The diode in the +V output was shorted and had gotten hot enough to melt in a plastic sheet I had placed under the unit (to prevent another burn mark on the bench). I haven't traced the circuit on the module. It is based on the UC3843B IC. A cursory look suggests that it originally had a current sensing resistor that is now by-passed so there is nothing to limit the current when the FET turns on. High peak currents on the 12v line could cause a oscillation with the 12v cable inductance and the 470u cap. (I've seen a similar situation with pwm of a FET for a motor control.) Bottom-line: Safe operation of the module operation appears quite dependent on the load. ## Features - Warning: High voltage danger! Please use with caution in non-electrician's profession! If you are a professional electrician who also pay attention to safety, good security measures. - Input voltage: DC10-32V. Input current: 5A (MAX). - Static operating current: 15mA (12V to 50V, the higher the output voltage will increase the quiescent current). - Output voltage: ± 45-390V 780V continuously adjustable. Output power: 40W (peak 70W). - Operating temperature: -40 ~ +75 ℃ (If the ambient temperature is high, please strengthen the heat). Operating frequency: 75KHz. ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #535,065 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,409 in Power Converters | | Customer Reviews | 4.0 out of 5 stars 24 Reviews | ## Images ![High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output - Image 1](https://m.media-amazon.com/images/I/81zXag50zxL.jpg) ![High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output - Image 2](https://m.media-amazon.com/images/I/71TBYdLwLoL.jpg) ![High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output - Image 3](https://m.media-amazon.com/images/I/71ZGYs2dAVL.jpg) ![High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output - Image 4](https://m.media-amazon.com/images/I/71ZJ38yoSbL.jpg) ![High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output - Image 5](https://m.media-amazon.com/images/I/71cd-w6DmjL.jpg) ## Questions & Answers **Q: can I wire these modules in parallel in order to increase current output?** A: Disclaimer: haven't actually tried it, but understand the engineering and electronics .. my answer? .. "probably, but I would advise against it". The DC coming out of these isn't the cleanest and the harmonics of doing that would likely result in magic smoke at some point .. and I should mention this is 100% Chineseium .. but they're cheap enough, so try it on a bench (outside) if you want. Not sure what you application is for it, but if you're driving a tesla coil primary (or whatever) and need a higher current ZVS they're easily found (AliExpress) .. depending on what actual voltage you need, you can also get a EU car inverter (230vac) and just rectify it with a capacitor of suitable voltage to smooth the output .. this can get you several hundred watts on the cheap, and that you can parallel, although be aware you're floating ground, so everything has to not touch .. it's also fairly trivial to get a ZVS driver board and run a MOT (Microwave Transformer) backwards as those are 20:1 or so, and just adjust your input accordingly. Another cheap way is similar to the first idea (inverter) and then drive a US/EU voltage converter (basically a 2:1 transformer) backwards, and that gets you to 440v which you then rectify. Use a decent inverter and you can get 15A at 440V this way for sub $100 price. Note this voltage and current is getting to the point where arc flash is a problem, and contact with it is likely to be your last (whereas this item you've asked about just kinda hurts a bit) .. this I do know from experience (I used one of these to ring a old 1970s phone via a 12v step up buck as a primary into this to get ~95vac .. AC because I just fed it a square wave under load). TL;DR .. tell me what you're trying to do and I can probably tell you a better way than this. **Q: I flipped the circuit board over and some pins are not soldered. Is it supposed to be like that? Thanks** A: Flip it back over and look what they go to, they're likely extra mounting tabs for the heatsink or transformer, in which case the answer is yes, it's fine. The larger components like this have to be hand-soldered (versus wave soldered or reflow oven .. which is much less labor intens) .. so being as it was made on the obvious side of the cost/quality trade, not unexpected. That said, I've used a couple of these (at far less than max forward current) and never had a problem. They're a good value when you need to drive a flyback or whatever. **Q: Would this be able to output 170v@150mA?** A: Output voltage: 45-390V continuously adjustable. Output current: 200mA MAX **Q: Its posible to reach 780 v ? how to use the jumper for short circuit and open circuit? on/off, how to use the different v+ ground and v- ?** A: Can reach 780V. Product output voltage is adjusted by the potentiometer. (Clockwise rotation potentiometer output voltage becomes larger, counterclockwise output becomes smaller) Input side are two blue terminals "+ IN-" on the left of the product; Onput side are three blue terminals "OUT V+ V-" on the right of the product; GND Connect the ground wire.. ## Customer Reviews ### ⭐⭐⭐⭐⭐ For me, worked great *by J***. on February 24, 2021* I needed to subject high voltage vacuum tubes to gradually increasing DC voltage. It is called "re-forming" tubes and you do it for tubes that have sat on the shelf for a long time. I hooked this DC-DC convertor to a 30V DC source and reformed the tubes at 100VDC, 200VDC, 300VDC and 390VDC for hours each. Never got too hot (I limited the current with a resistor). Worked fine. Caution: there's a fair amount of noise on the output--it isn't hifi quality DC, so you might want to add choke- and/or capacitor-based filtering to smooth out the output. I didn't need that, hence the 5 starts. For the price it is tops. ### ⭐⭐ Not useful for battery charging *by D***D on August 4, 2025* I have had two fail, both ending with the 12v by-pass cap exploding quite violently (don't lean over the module when it is powered!). With the first setup, I connected the gnd-to-+V output to a battery bank at 197v, via a 10 ohm resistor for checking the current. Before connecting to the battery bank, the module +V voltage was set to 205v. The charge current started at 300 ma. I adjusted the pot to lower the voltage setting, and the charge current decreased as expected. When it was about 1.5v (i.e. 150 ma) all hell broke loose. The 10 ohm resistor turned brilliant yellow. Something on the bottom side of the board lit up. A second of two later the 470u cap across the 12v input exploded. The rectifier diode (US3M) in the +V side got so hot that the solder melted and it fell off. Thinking the battery bank power fed back through the +V circuit after the output diode shorted, I tried a second unit and added a 1N1007 (1000v) diode between the +V and the battery bank. The charging current started at 350 ma, then after a few seconds suddenly stopped. I quickly disconnected the 12v, then disconnected the battery bank. Then reconnected the 12v to check the +V and -V voltages. In a matter a few seconds the 470u cap exploded. (Again quite violently). The diode in the +V output was shorted and had gotten hot enough to melt in a plastic sheet I had placed under the unit (to prevent another burn mark on the bench). I haven't traced the circuit on the module. It is based on the UC3843B IC. A cursory look suggests that it originally had a current sensing resistor that is now by-passed so there is nothing to limit the current when the FET turns on. High peak currents on the 12v line could cause a oscillation with the 12v cable inductance and the 470u cap. (I've seen a similar situation with pwm of a FET for a motor control.) Bottom-line: Safe operation of the module operation appears quite dependent on the load. ### ⭐⭐⭐⭐⭐ Works great! *by J***T on December 5, 2018* Purchased this to power the high voltage backlighting of a broken Samsung TV, easy to adjust, and minimal voltage deviation based on load. Overall works great! ## Frequently Bought Together - LM YN High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output - Cermant 5PCS 400V 150UF Capacitor 18x30MM(0.7x1.18in) Aluminum Electrolytic Capacitors for TV, LCD Monitor, Game --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/43225075-high-voltage-power-supply-module-dc-dc-45-390v-adjustable](https://www.desertcart.tn/products/43225075-high-voltage-power-supply-module-dc-dc-45-390v-adjustable) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-09*