DC-Transformer 257E-28-SD
Key figures
- ultrawide input voltage range: 15 ... 35 VDC
- very high efficiency: up to 97%
- peak input voltage: 37 VDC
- output voltage / max. output current: 28.0 VDC / 13.0 ADC
Applications
Short-circuit proof buck-boost charging converter for primary use in supercapacitor-powered autonomous systems with an output-side backup battery. The converter with 28V output and up to 13A short-circuit current is designed to power to 13.8V batteries in parallel. The alternative 258E-28-SD with an extended input voltage range of 16 ... 55V for 48V supercapacitor powered systems complements the input voltage range generously.
Features
- non-isolated DC/DC buck-boost converter
- robust and climate proof design
- excellent thermal characteristics
- permanently no-load and short-circuit proof
- integrated EMI input and output filter
- no power derating
- for ambient temperatures between -40°C / +85°C
- thermal shutdown at +90°C
- CC/CV charging characteristic
Take away
Product Family
DC-Transformer | Input | Output | Power |
---|---|---|---|
256E-24-SD | 15 ... 70 VDC | 24.0 VDC / 6.3 ADC | 150 W |
257E-24-SD | 15 ... 35 VDC | 24.0 VDC / 15.0 ADC | 360 W |
257E-28-SD | 15 ... 35 VDC | 28.0 VDC / 13.0 ADC | 360 W |
257E1-24-SD | 15 ... 35 VDC | 24.0 VDC / 15.0 ADC | 360 W |
257LE-24-SD | 10 ... 35 VDC | 24.0 VDC / 12.5 ADC | 300 W |
257LE1-29 | 6 ... 28 VDC | 29.0 VDC / 6.5 ADC | 180 W |
257LEX-12-SD | 7 ... 35 VDC | 12.0 VDC / 20.0 ADC | 240 W |
257LEX-24-SD | 7 ... 35 VDC | 24.0 VDC / 8.0 ADC | 200 W |
258E-24 | 15 ... 58 VDC | 24.0 VDC / 13.0 ADC | 300 W |
258E-50 | 20 ... 63 VDC | 50.4 VDC / 10.0 ADC | 500 W |
258E1-27.5-ON | 15 ... 58 VDC | 27.5 VDC / 8.0 ADC | 220 W |