Description
This DC-DC converter (buck converter, input must be higher than output) can take a higher input voltage than most, right up to 50v maximum, and produce an output voltage from 1.5v all the way to 30v. It also has a Constant Current mode but not over the entire range, see the images.
Please see this PDF for full data about the HW-732 ( https://tinyurl.com/23ppffq6 ), but here’s some typical numbers…
28 Volts at 1 Amp Out, 46.2 Volts In, 85% Efficiency
12 Volts at 2 Amps Out, 14.4 Volts In, 81% Efficiency
12 Volts at 1 Amps Out, 16.8 Volts In, 82% Efficiency
5 Volts at 2 Amps Out, 16.8 Volts In, 65% Efficiency
5 Volts at 1 Amps Out, 28.8 Volts In, 70% Efficiency
Important: Current limiting is only active in a specific area of operation, see the images and the PDF linked above. Also Importamt: The module may get hot, I mean, burn your fingers hot, if running at the full current, the PDF has some charts for each output voltage which show an “orange” band for where caution may be required in regards to not touching hot things. All my testing has been without a heatsink, on my bench.
Additional Specs
- Voltage: In 5 to 50v; Out 1.5 to 30v
- Current: Up to 2A continuous depending on in/out voltages (see images)
- Dimensions: 47mm long, 24mm wide, 14mm high
- Potential uses: step-down from up to 10-S lithium packs, led driving, general power supply from old laptop power pack…
See all my listings: https://tinyurl.com/26tzbx6d
Details
Shipping & pick-up options
| Destination & description | Price | |
|---|---|---|
| Nationwide 1-2 days, Express Urban | $5.70 | |
| Nationwide 2-4 days, Rural | $11.70 | |
| Combine with another item you've paid shipping on | $0.00 | |
| Shipping more than one item | No extra charge | |
Estimated delivery times in business days
Seller does not allow pick-ups
Payment Options
Pay instantly by card and Ping balance.
Four fortnightly interest-free payments.
Questions & Answers (3)
FAQs: All stock is in Christchurch. Express Urban and Rural Standard is with Courier Post (NZ Post Courier), PO Box welcome. Pickup is not possible sorry. Tracking and GST Invoice links are emailed when shipped - CHECK YOUR SPAM. Combined shipping means you pay shipping on one item, and choose "Combine with another" on the rest. Seller comment Monday, 4 May 2026 HOW TO SAVE WITH COMBINED SHIPPING: Use the Trade Me cart or purchase each separately - choose Urban or Rural shipping option (not Economy) on one item, and choose "Combine with another" on the rest - NO LIMIT! Seller comment Monday, 4 May 2026 RURAL DELIVERY: Rural dwellers, if you have a Woolworths or NZ Post nearby did you know you can use a Parcel Collect address with NZ Post so you only have to pay urban shipping? Google NZ Post Parcel Collect to register. Seller comment Monday, 4 May 2026
Step Down DC-DC Converter, Input 5-50v, Output 1.5-30v, CC/CV Feature
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