Power modules – QSS50-270
The QSS50-270 power module family is described by the configuration-specific ratings in the following tables. DC/DC isolated conversion. Maximum output power: 50W. Input undervoltage protection. Refer to the selection table, pin assignments and application guidance for the selected configuration.
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 - QSS50-270
The QSS50-270 power module family is described by the configuration-specific ratings in the following tables. DC/DC isolated conversion. Maximum output power: 50W. Input undervoltage protection. Refer to the selection table, pin assignments and application guidance for the selected configuration.
- DC/DC isolated conversion
- Maximum output power: 50W
- 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 (%) Typical | Capacitive load (µF) max. | Ripple (mV) Typical |
|---|---|---|---|---|---|---|
| QSS50-270S05SNMa | 200 to 400 | 5 | 10.0 | 87.0 | 4700 | 100 |
| QSS50-270S12SNMa | 200 to 400 | 12 | 4.17 | 88.0 | 1500 | 120 |
| QSS50-270S28SNM | 200 to 400 | 28 | 1.79 | 87.0 | 470 | 200 |
Technical Data — QSS50-270
| Characteristic | Test temperature | Min. | Typ. | Max. | Unit | Conditions |
|---|---|---|---|---|---|---|
| Input voltage range | Room, High, Low | 200 | 270 | 425 | V | see the product selection table |
| Input surge voltage | Room | — | — | 450 | V | Vt=100mS, full load |
| No-load power consumption | Room | — | 4.5 | — | W | nominal input voltage, no output load |
| Output voltage adjustment range | Room, High, Low | 90 | — | 110 | %Vo | Io≤ maximum value and Po≤Vo×Iomax; |
| Line regulation | Room, High, Low | -1 | — | +1 | %Vo | full input-voltage range, full load |
| Load regulation | Room, High, Low | -1 | — | +1 | %Vo | full load range |
| Turn-on delay a | Room | — | 28 | 100 | ms | time from power-on until output voltage reaches 10% time |
| Output voltage rise time a | Room | — | 15 | 50 | ms | output voltage from 10% rises to 90% time |
| ENA Turn-on delay a | Room | — | 20 | 100 | ms | time from enable assertion until output voltage reaches 10% time |
| Enable logic level (positive logic) | Room | 0 | — | 0.7 | V | no output, see the application guide for control methods |
| Enable logic level (positive logic) | Room | 3.5 | — | 15.0 | V | output enabled when open or high, see the application guide for control methods |
| Enable logic level (negative logic) | Room | 0 | — | 0.7 | V | output enabled, see the application guide for control methods |
| Enable logic level (negative logic) | Room | 3.5 | — | 15.0 | V | no output when open or high, see the application guide for control methods |
| Input undervoltage protection | Room | 140 | — | 160 | V | half load |
| Input undervoltage recovery | Room | 160 | — | 180 | V | half load |
| Output overcurrent protection | Room | 105 | 120 | — | %Io | hiccup mode, automatic recovery after fault removal |
| Output short-circuit protection | Room | — | — | — | — | hiccup mode, automatic recovery after fault removal |
| Output overvoltage protection | Room | 110 | 130 | 135 | %Vo | half output load, clamping mode, automatic recovery |
| overtemperature protection | — | 108 | — | 125 | °C | temperature at the center of the heat-transfer surface |
| Isolation withstand voltage | Room | - | no breakdown, no flashover; input to output, 2250Vdc/60s/<3.5mA | |||
| Insulation resistance | Room | 100 | — | — | MΩ | 500Vdc, input, output, between each pair of terminals and case |
| Switching frequency | Room | — | 160 | — | kHz | |
| Weight | / | — | 45 | — | g |
Note: 1, for other 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, "a" the interval between power-off and the next power-on must exceed 3s.
a: typical model QSS50-270S12SNM parameter values, values may differ for other models, contact technical support for details.
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