We’ve ordered some cheap converters from aliexpress and tested them for you.
First of all, the best ones for laptops are the RCNUN 48V-19V 10A converters.
Just use these in conjunction with our safety circuit (in development). The safety circuit will protect your equipment if anything goes wrong. The safety circuit will be available at SHA2017 as a kit too.
| Specs | YDS3xx | YDS5xx | SH-PWS6 | HRD05003 | WD6001J | RCNUN 48-19V 10A |
|---|---|---|---|---|---|---|
| I(max) | 3.5A | 5.5A | not limited... | Not tested, sorry... | Not tested, sorry... | At least 7A (didn't have 10A sink) |
| Vin(max) | >=50V | >=50V | >=54V | >50V | >56V | range: 32-60V |
| Eff(meas)@Vout | 80%@6.7V 87%@23V | 86%@12V 93%@24V | 94%@12.5V | 88%@12V | 90%@12V | 92%, every input Voltage |
| Output short test | OK! (5W power dissipation) | OK! (7W power dissipation) | Burns out! Not safe... | OK! (5W power dissipation) | No, will burn out! | OK! (25W power dissipation) |
| Max. temperature(meas) | Hot! >90 Celsius | Hot! >90 Celsius | About 80 Celsius | Hot! >90 Celsius | About 80 Celsius | Didn't got hot at all! |
| Failmode | Input Voltage on output | Input Voltage on output | 0V on output (not guaranteed) Input current very high, shorted. | Probably: Input Voltage on output | Probably: Input Voltage on output | Unknown |
| Idle current | < 15mA | < 15mA | Not tested, sorry... | 7mA | 3.5mA | 10mA |