4 Electrical Parameters
This section shows the electrical parameters of the SA50-28 Single Series device under the following conditions unless otherwise specified:
| Parameter | Output | Conditions | Min | Nom | Max | Units |
|---|---|---|---|---|---|---|
| Input voltage | ||||||
| (Vin) | — | Note 2 | 20 | 28 | 40 | V |
| Output voltage | ||||||
| (VOUT) | 28V | IOUT = 100% rated load | 27.73 | 28.00 | 28.27 | V |
| 15V | 14.85 | 15.00 | 15.15 | |||
| 12V | 11.88 | 12.00 | 12.12 | |||
| 5V | 5.05 | 5.10 | 5.15 | |||
| 3.3V | 3.27 | 3.30 | 3.33 | |||
| Output Voltage Adjust | ||||||
| (VADJ) | — | — | 5 | — | — | % |
| Output power | ||||||
| (POUT) | 28V | Note 13 In all cases Output power must be kept within Pout rating. | 0 | — | 50 | W |
| 15V | 50 | |||||
| 12V | 50 | |||||
| 5V | 50 | |||||
| 3.3V | 33 | |||||
| Output current | ||||||
| (IOUT) | 28V | — | 0 | — | 1.8 | A |
| 15V | 3.3 | |||||
| 12V | 4.2 | |||||
| 5V | 10 | |||||
| 3.3V | 10 | |||||
| Line regulation | ||||||
| (VRLINE) | 28V | VIN = 20 V, 28 V, 40 V IOUT = 10%, 50%, 100% rated Note 12 | -56 | — | 56 | mV |
| 15V | -30 | 30 | ||||
| 12V | -24 | 24 | ||||
| 5V | -10 | 10 | ||||
| 3.3V | -10 | 10 | ||||
| Load regulation | ||||||
| (VRLOAD) | 28V | VIN = 20 V, 28 V, 40 V IOUT = 10%, 50%, 100% rated Note 11 | -280 | — | 280 | mV |
| 15V | -150 | 150 | ||||
| 12V | -120 | 120 | ||||
| 5V | ̶ 50 | 50 | ||||
| 3.3V | -50 | 50 | ||||
| Input current | ||||||
| (IIN) | — | IOUT=0, pin3 open | — | 100 | 150 | mA |
| Pin 3 shorted to pin 2 | — | 2 | 5 | |||
| Output ripple | ||||||
| (VRIP) | 28V | VIN = 20 V, 28 V, 40 V IOUT = 100% rated, Note 4 | — | 100 | 280 | mV p-p |
| 15V | — | 75 | 150 | |||
| 12V | — | 60 | 120 | |||
| 5V | — | 25 | 50 | |||
| 3.3V | — | 25 | 50 | |||
| Switching frequency | ||||||
| (FS) | — | Sync input (pin 4) open | 200 | 220 | 240 | kHz |
| Efficiency | ||||||
| (EFF) | 28V | IOUT = 100% rated load | 78 | 82 | — | % |
| 15V | 77 | 82 | — | |||
| 12V | 76 | 82 | — | |||
| 5V | 71 | 81 | — | |||
| 3.3V | 62 | 79 | — | |||
| Inhibit input | ||||||
| Inhibit input: ON Threshold | — | Note 1 | 4.5 | — | — | V |
| Inhibit input: OFF drive current (sink) | — | Note 1 | 1000 | — | — | µA |
| Inhibit input: OFF Threshold | — | Note 1 | — | — | 2 | V |
| Current limit point | ||||||
| (% rated output) | — | When VOUT = 90% of nominal set point | 105 | — | 145 | % |
| Synchronization | ||||||
| frequency range | — | The external clock on sync input (pin 4) | 500 | — | 600 | kHz |
| Synchronization pulse-high level | — | Note 1 | 4.0 | — | 10.0 | V |
| Synchronization pulse-low level | — | Note 1 | -0.5 | — | 0.5 | V |
| Synchronization pulse-transition rate | — | Note 1 | 200 | — | — | V/µs |
| Synchronization pulse-duty cycle | — | Note 1 | 10 | — | 80 | % |
| Power dissipation, load fault | ||||||
| (PD) | — | Short circuit, overload Note 6 | — | — | 24 | W |
| Output response to step load changes | ||||||
| (VTLD) | 28V | (50% to/from 100%) rated load Note 7 | -2200 | — | 2200 | mV peak |
| 15V | -1200 | 1200 | ||||
| 12V | -900 | 900 | ||||
| 5V | -500 | 500 | ||||
| 3.3V | -300 | 300 | ||||
| Recovery time, step load changes | ||||||
| (TTLD) | — | (50% to/from 100%) rated load Notes 7, 8 | — | 200 | 2000 | µs |
| Output response to step line changes | ||||||
| (VTLN) | 28V | 20V to/from 40V IOUT = 100% rated load Note 9 | -1000 | — | 1000 | mV peak |
| 15V | -600 | 600 | ||||
| 12V | -480 | 480 | ||||
| 5V | -300 | 300 | ||||
| 3.3V | -300 | 300 | ||||
| Recovery time, step line changes | ||||||
| (TTLN) | — | 20V to/from 40V IOUT = 100% rated load Notes 8, 9 | — | 200 | 2000 | µs |
Turn-on response: overshoot | ||||||
| (VOS) (main) | 28V | (0% to 100%) rated load Notes 3, 4, 10 | — | — | 2800 | mV |
| 15V | — | — | 1500 | |||
| 12V | — | — | 1200 | |||
| 5V | — | — | 500 | |||
| 3.3V | — | — | 500 | |||
| Turn-on response: turn-on delay | ||||||
| (TDLY) | — | Note 10 | 0.1 | — | 10 | ms |
Capacitive load | ||||||
| (CL) | 28V | Note 5 | — | — | 200 | µF |
| 15V | — | — | 350 | |||
| 12V | — | — | 450 | |||
| 5V | — | — | 1000 | |||
| 3.3V | — | — | 1000 | |||
Line rejection | ||||||
| — | — | DC to 50 kHz, IOUT = 100% rated load | 30 | 60 | — | dB |
Isolation | ||||||
| — | — | 50V @25°C
| 100 | — | — | MΩ |
Mass | ||||||
| — | — | Standard case style A, B | — | 120 | — | g |
MTBF | ||||||
| — | — | MIL-HDBK-217F2, SF, 35°C | — | 8.22x106 | — | hrs |