QSQ-28/48 Constant-Current / Constant-Voltage Power Modules (1/4 brick)
The QSQ-28 / 48 / CC / CV power module family is described by the configuration-specific ratings in the following tables. DC/DC isolated conversion. Maximum output power: 300W. Input undervoltage protection, overtemperature protection, Constant-current output function. Refer to the selection table, pin assignments and application guidance for the selected configuration.
Input 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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QSQ-28/48 Constant-Current / Constant-Voltage Power Modules (1/4 brick)
The QSQ-28 / 48 / CC / CV power module family is described by the configuration-specific ratings in the following tables. DC/DC isolated conversion. Maximum output power: 300W. Input undervoltage protection, overtemperature protection, Constant-current output function. Refer to the selection table, pin assignments and application guidance for the selected configuration.
- DC/DC isolated conversion
- Maximum output power: 300W
- Input undervoltage protection, overtemperature protection, Constant-current output function
- Application: battery charging, Large capacitive-load capability
- 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 |
|---|---|---|---|---|---|---|
| QSQ300H-28S36NNM* | 16 to 40 | 36 | 8.34 | 94/93.7 | 100000 | 120 |
| QSQ300H-48S36NNM* | 36 to 75 | 36 | 8.34 | 95/94.5 | 100000 | 150 |
Technical Data — QSQ-28 / 48 / CC / CV
| Characteristic | Test temperature | Min. | Typ. | Max. | Unit | Conditions |
|---|---|---|---|---|---|---|
| Input voltage range | Room, High, Low | 16 | 28 | 40 | V | 28 series |
| Input voltage range | Room, High, Low | 36 | 48 | 75 | V | 48 series |
| Input surge voltage | Room | — | — | 50 | V | Vt=100ms, full load, 28 series |
| Input surge voltage | Room | — | — | 80 | V | Vt=100ms, full load, 48 series |
| No-load power consumption | Room | — | 7.5 | — | W | nominal input voltage, no output load |
| Output current | Room, High, Low | — | — | 8.34 | A | full input-voltage range |
| constant-current output | Room | 8.5 | 9.3 | — | A | full input-voltage range |
| Output voltage adjustment range | Room | 20 | — | 36 | V | Io≤ maximum value and Po≤Vo×Iomax |
| Constant-current setpoint adjustment range | Room | 3 | — | 8.34 | A | Vo≤ maximum value, only current trim-down is supported |
| Line regulation | Room, High, Low | -0.5 | — | +0.5 | %VO | full input-voltage range |
| Load regulation | Room, High, Low | -2 | — | +2 | %VO | full load range |
| Turn-on delay a | Room | — | 105 | — | ms | time from power-on until output voltage reaches 10% time |
| Output voltage rise time a | Room | — | 65 | — | ms | output voltage from 10% rises to 90% time |
| Enable turn-on delay a | Room | — | 108 | — | ms | ENA time from power-on until output voltage reaches 10% time |
| 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 | — | 12 | V | no output when open or high, see the application guide for control methods |
| Input undervoltage protection | Room | 11 | — | 15.8 | V | no load, 28 series |
| Input undervoltage protection | Room | 31 | — | 35.8 | V | no load, 48 series |
| overtemperature protection | High | 108 | — | — | °C | temperature measured at the center of the heat-transfer surface, stable case temperature 105°C then power on for testing, half output load, automatic recovery |
| Isolation withstand voltage | Room | - | no breakdown, no flashover; input to output, 1500Vdc/60s/<3.5mA | |||
| Insulation resistance | Room | 100 | — | — | MΩ | 500Vdc, input, output, between each pair of terminals and case |
| Switching frequency | Room | — | 300 | — | kHz | |
| Weight | / | — | 90 | — | g | N case type |
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