Hold-up modules – QMT
The QMT hold-up module family is described by the configuration-specific ratings in the following tables. Power-limited charging mode, 500 ms charging time. Automatic transfer to capacitor discharge on input power loss. Operating temperature (Tc): -55°C to 105°C. Refer to the selection table, pin assignments and application guidance for the selected configuration.
Output current (A)
Ratings apply to the selected configuration. See the datasheet for test conditions and model designation notes.
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Hold-up modules - QMT
The QMT hold-up module family is described by the configuration-specific ratings in the following tables. Power-limited charging mode, 500 ms charging time. Automatic transfer to capacitor discharge on input power loss. Operating temperature (Tc): -55°C to 105°C. Refer to the selection table, pin assignments and application guidance for the selected configuration.
- Power-limited charging mode, 500 ms charging time
- Adjustable energy-storage capacitor voltage
- Adjustable capacitor discharge-voltage threshold
- Automatic transfer to capacitor discharge on input power loss
- Operating temperature (Tc): -55°C to 105°C
- Storage temperature: -55°C to 125°C
Product Selection
| Model | Input voltage (V) | Output voltage (V) Typical | Output current (A) | Capacitor charging voltage (V) Typical | Energy-storage capacitance (µF) |
|---|---|---|---|---|---|
| QMT10-28S35SM | 16 to 40 | Vi-0.1 | 4 | 35 | ≤10000 |
| QMT30-28S35SM | 16 to 40 | Vi-0.1 | 10 | 35 | ≤33000 |
Technical Data — QMT
| Characteristic | Test temperature | Min. | Typ. | Max. | Unit | Conditions |
|---|---|---|---|---|---|---|
| Input voltage range | Room, High, Low | 16 | 28 | 40 | V | full load range |
| Capacitor charging turn-on voltage | Room, High, Low | 20 | 21 | 22 | V | full load range |
| Input transient voltage | Room | — | — | 50 | V | input duration 100ms no damage |
| Capacitor discharging turn-on voltage | Room, High, Low | — | 18 | 18.5 | V | Cext pin connects to an external energy-storage capacitor, tested at input power loss |
| No-load input current | Room | — | 30 | 50 | mA | Vin=28V, no load |
| Energy-storage capacitor charging voltage | Room | 34 | 35 | 36 | V | Vin=22V to 40V, Cext pin connects to an external energy-storage capacitor |
| Maximum energy-storage capacitor charging voltage | Room | — | 40 | 41 | V | Vcl connect to GND |
| Energy-storage capacitor discharge delay | Room | — | 50 | 100 | µs | Cext pin connects to an external energy-storage capacitor, tested at input power loss |
| Energy-storage capacitor charging time | Room | — | 350 | 450 | ms | Cext pin connects to an external energy-storage capacitor |
| Dielectric strength | Room | 500 | — | — | V | any terminal to case, 1min/5mA |
| Insulation resistance | Room | 100 | — | — | MΩ | 500Vdc, input to case, output to case |
| Weight | / | — | 10 | 15 | — | QMT10-28S35SM |
| Weight | / | — | 20 | 25 | — | QMT30-28S35SM |
Outline & Mechanical Dimensions
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