Product: DC Power Supply Auto Step Up/ Down Converter Constant Current Buck Boost Module
Parameters:
- Input voltage: 5 ~ 30V
- Output voltage: 0.5 ~ 30V
- Output current: 3A (add heat up to 4A)
- Output power: 35W (add heat up to 60W)
- Output ripple: 20mV (12V 3A), while the common module is far more than 100mV!
- Conversion efficiency: 87 ~ 91% (Boost); 87 ~ 89% (Buck) (This parameter will change according to the pressure and load)
- Input overcurrent protection: 10A fuse
- Input anti-protection: High efficiency MOS type
- Input Undervoltage Protection: Yes
- Output overcurrent protection: Yes
- Operating frequency: 180KHZ
- Board size: 69 * 28 * 21mm

Features:
1. Can buck and boost, regardless of input voltage.
2. Constant current function for charging batteries.
3. Allows setting up the value of constant current without multimeters.
4. Ultra-low output ripple voltage suitable for audio amplifier board and analog circuit power supply.
5. Includes perfect protection functions such as anti-burning circuit, input undervoltage shutdown, and output over-current protection.
6. Turn the lights function for easy use during charging.

Package Include:
- 1 x DC-DC Auto Step Up Step Down Power Supply Constant Current Buck Boost Module

Refund:
- All packages need to wait 30 days (US only need 7-10 days). Less than 30 days, a refund cannot be processed.
- Defective items can be returned within 14 days for a replacement or money back, but must be in factory condition.
- Defective items within 12 months can also be returned for a replacement.

About Shipping:
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Payment:
- PayPal is the accepted method of payment.
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- Payment must be received within 5 business days of auction closing.
- Special requests cannot be accepted after 24 hours of payment.

We keep a close eye on consumer needs,offering continual innovation and product development and an ever-changing core product range.Each product undergoes rigorous development and testing,keeping quality and longevity in mind.In addition,our trained customer service team work hard to ensure that any queries are dealt with efficiently and strive to ensure that you are always provided with the highest level of customer support.

Any questions,please contact us through eBay message or e-mail,We will reply within 1-2 business days(public holidays not included).
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We are happy to be able to offer our customers 60 day returns on our products.All items can be returned and a refund will be issued,provided they are returned within 60 days of receipt of purchase.In the unlikely event that you are not happy with your purchase please do not hesitate to contact our customer services team.

We offer at least 1 year guarantee on all of our products.