DFRobot 20W Adjustable DC-DC Boost Converter With Digital Display
Description
- DFRobot 20W Adjustable DC-DC Boost Converter With Digital Display
- Adjustable output: 5V–35V from a 3V–32V input
- Up to 94% conversion efficiency
- On-board digital voltmeter with self-calibration mode
- Overheating protection and short-circuit protection
- Screw terminal + solder pad dual connection options
The DFRobot 20W Adjustable DC-DC Boost Converter (DFR0123) is a compact step-up power module built around a professional boost IC. It accepts a wide 3–32V input and delivers a precisely regulated 5–35V output at up to ±0.05V accuracy, making it ideal for powering higher-voltage loads from batteries, automotive sources, or low-voltage bench supplies. The 400 kHz switching frequency keeps the design efficient across the full range, peaking at 94% conversion efficiency.
The module features an integrated digital display voltmeter that shows both input and output voltage, complete with a single-button self-calibration routine for accurate readings across the entire voltage range. Terminal blocks mean no soldering iron is required for most setups, while solder pads remain available for permanent installations. Built-in overheating and short-circuit protection safeguard both the module and the connected load during extended or high-demand operation.
- 1x DFRobot 20W Adjustable DC-DC Boost Converter With Digital Display
- 60 mm × 37 mm (PCB footprint)
- Input Voltage: 3V – 32V (best: 5V – 32V)
- Output Voltage: 5V – 35V (adj. ±0.05V)
- Switching Frequency: 400 kHz
- Rectification: Non-synchronous
- Input Current (peak): 4A
- Max Output Power: 20W (≤15W recommended)
- Conversion Efficiency: Up to 94%
- Output Ripple: 50 mV (typ.)
- Load Regulation: ±0.5%
- Voltage Regulation: ±0.5%
- Operating Temperature: −40°C to +85°C
- Display: 4-digit digital tube voltmeter
It worked well in my project.
This is a solid board,
Ceci est un conseil solide,
I just measured the quiescent power consumption of the board, without any load, and it gobbles up 48 mA just sitting there, powered from a 5V smooth supply. This, I figure, would be power loss that would be in addition to the 10 percent total power loss reported as "%90 effeciency", which would be an additional tax on each amp that crosses the board of 100mA. So if your demand is 1 amp, it will probably ask for around 150 mA to operate, which is considerable in some applications. The board has operated very smoothly, and is incredibly cheap. But, for battery powered applications, or solar-powered applications, it is a hard decision to make whether to include it or not. It has worked perfectly to drive NPN MOSFET gates on the high side of a 12V DC motor H-Bridge (all NPN MOSFETs), which makes for cheap and effecient high-side switches, compared with PNP MOSFET, which have higher on-resistances. I think the lower on-resistance of a well-saturated NPN MOSFET gate is well worth the 48mA power-tax of this boost, especially if you're driving dozens of MOSFETS for high-current-draw, from that smooth 18V from this boost. But, for example, if you're just driving one single motor, this board's 48mA might be more than the power savings achieved by low RDS-on. Still, this is a solid board, and DFRobot's buck, also sold here, is amazing.
Je viens de mesurer la consommation d'énergie au repos de la carte, sans aucune charge, et elle engloutit 48 mA, restée assise là, alimentée par une alimentation douce de 5V. Je suppose que cela constituerait une perte de puissance qui viendrait s’ajouter à la perte de puissance totale de 10% signalée comme "% 90% d'efficacité", ce qui constituerait une taxe supplémentaire sur chaque amplificateur dépassant le seuil de 100 mA. Donc, si votre demande est de 1 ampère, il faudra probablement environ 150 mA pour fonctionner, ce qui est considérable dans certaines applications. Le conseil a très bien fonctionné et est incroyablement bon marché. Toutefois, pour les applications alimentées par batterie ou à énergie solaire, il est difficile de décider de l'inclure ou non. Il a parfaitement fonctionné pour piloter les grilles NPF MOSFET sur le côté haut d'un pont en H à pont de 12 V CC (tous les MOSFET NPN), ce qui permet d'obtenir des commutateurs haut-côté économiques et efficaces, comparés aux PNP MOSFET, qui offrent des résistances plus élevées. Je pense que la résistance à la surchauffe plus faible d'un portail MOSFET NPN bien saturé vaut bien la taxe de puissance de 48 mA de ce boost, en particulier si vous conduisez des dizaines de MOSFETS à forte consommation de courant, à partir de ce 18V lisse de ce boost . Mais, par exemple, si vous ne conduisez qu’un seul moteur, les 48 mA de cette carte peuvent représenter plus que les économies d’énergie réalisées grâce au faible RDS-on. Pourtant, il s’agit d’une planche solide, et l’argent de DFRobot, également vendu ici, est incroyable.