Power modules – QSF-270/540
The QSF-270 / 540 power module family is described by the configuration-specific ratings in the following tables. DC/DC isolated conversion. Maximum output power: 2000W. Input undervoltage protection. Refer to the selection table, pin assignments and application guidance for the selected configuration.
Input voltage (V)
Output voltage (V)
Ratings apply to the selected configuration. See the datasheet for test conditions and model designation notes.
Source markers *, a and b are footnotes, not part of the part number. See Technical Data for the corresponding notes.
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Power modules - QSF-270/540
The QSF-270 / 540 power module family is described by the configuration-specific ratings in the following tables. DC/DC isolated conversion. Maximum output power: 2000W. Input undervoltage protection. Refer to the selection table, pin assignments and application guidance for the selected configuration.
- DC/DC isolated conversion
- Maximum output power: 2000W
- Input undervoltage protection
- Output overvoltage, overcurrent, short circuit, Overtemperature protection
- Operating temperature (Tc): -55°C to 105°C
- Storage temperature: -55°C to 125°C
Product Selection
| Model | Input voltage (V) | Output voltage (V) | Output current (A) | Efficiency (%) half load / full load | Capacitive load (µF) max. | Ripple (mV) Typical |
|---|---|---|---|---|---|---|
| QSF1500D-270S12NNM | 180 to 425 | 12 | 125 | 94.5/94 | 10000 | 240 |
| QSF2000D-270S28NNM | 180 to 425 | 28 | 71.4 | 95/95 | 10000 | 240 |
| QSF2000D-270S48NNM* | 180 to 425 | 48 | 41.7 | 95/95 | 10000 | 300 |
| QSF1500D-540S12NNM | 350 to 800 | 12 | 125 | 94/93 | 10000 | 240 |
| QSF2000D-540S28NNM | 350 to 800 | 28 | 71.4 | 95/95 | 10000 | 240 |
| QSF2000D-540S48NNM* | 350 to 800 | 48 | 41.7 | 95/95 | 10000 | 300 |
Technical Data — QSF-270 / 540
| Characteristic | Test temperature | Min. | Typ. | Max. | Unit | Conditions |
|---|---|---|---|---|---|---|
| Input voltage range | Room, High, Low | 180 | 270 | 425 | V | QSF-270 series, 180V to 200V due to the duty-cycle limit, output voltage varies linearly with input voltage, normal operating range: 200V to 425V |
| Input voltage range | Room, High, Low | 350 | 540 | 800 | V | QSF-540 series, 350V to 400V due to the duty-cycle limit, output voltage varies linearly with input voltage, normal operating range: 400V to 800V |
| Output voltage adjustment range | Room | 80 | — | 110 | %VO | rated input voltage, IO≤ maximum value and PO≤VO×IOmax; |
| Line regulation | Room, High, Low | -1 | — | +1 | %VO | QSF-270 series: input 200V to 425V, full load QSF-540 series: input 400V to 800V, full load |
| Load regulation | Room, High, Low | -2 | — | +2 | %VO | rated input voltage, full load range |
| Turn-on delay a | Room | — | 150 | — | ms | time from power-on until output voltage reaches 10% time |
| Output voltage rise time a | Room | — | 110 | — | ms | output voltage from 10% rises to 90% time |
| Enable turn-on delay a | Room | — | 140 | — | ms | time from enable assertion until output voltage reaches 10% time |
| Enable logic level (negative logic) | Room | 0 | — | 0.7 | V | output enabled when grounded or low, see the application guide for control methods |
| Enable logic level (negative logic) | Room | 3.5 | — | 12 | V | no output when high or open, see the application guide for control methods |
| Input undervoltage protection | Room | 155 | — | 175 | V | QSF-270 series, half load |
| Input undervoltage protection | Room | 330 | — | 345 | V | QSF-540 series, half load |
| Output overcurrent protection | Room | 105 | — | — | %IO | constant-current limiting followed by hiccup mode, automatic recovery |
| Output short-circuit protection | Room | — | — | — | — | hiccup mode, automatic recovery |
| Output overvoltage protection | Room | 110 | — | 140 | %VO | hiccup mode, automatic recovery |
| Switching frequency | Room | — | 110 | — | kHz | |
| Isolation withstand voltage | Room | - | — | no breakdown, no flashover; input to output, 3000Vdc/60s/<3.5mA | ||
| Insulation resistance | Room | 100 | — | — | MΩ | 500Vdc, input, output, between each pair of terminals and case |
| Weight | / | — | 340 | — | g |
Note: 1, for other package types or temperature-screening grades, use the corresponding model designation rules when ordering, contact technical support for details; 2, electrical data and mechanical dimensions in this manual are for product selection reference, the detailed product specification governs the final requirements; 3, see the typical application circuit for the ripple measurement method; 4, "*" product under development, contact technical support for details.
a: typical model QSF2000D-270S28NNM parameter values, values may differ for other models, contact technical support for details.
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