RB125, RB126
REGULATED DC TO DC POWER BOOSTER
FAA TSO-C71
The RB Series is a pulse width-modulated DC to DC converter that provides regulated +28 VDC up to 5.0 amperes
The converter transforms an unregulated input from a 12V battery to a regulated +28 VDC output in a bootstrap mode.
The Model RB Series is primarily intended for use in an aircraft with 12 VDC battery system to operate 28 VDC equipment (especially during periods when the battery is not charged).
Features:
- State of the art design for regulation and positive logic for output overvoltage protection.
- Output is adjustable to 28 ± 2 VDC via an internal trim pot.
- Designed to meet various applicable portions MIL-STD 704 notice 3, MIL-STD-202 and MIL-T-5422F class 1A.
- The Model RB Series is serviceable, small and lightweight (110 watts per pound and 5.8 watts per cubic inch for the RB-126)
Specifications
Input Voltage
RB-125: 11-16 VDC
RB-126: 13.5-16 VDC
RB-125: 11-16 VDC
RB-126: 13.5-16 VDC
Input Current
RB-125: 14-11 ADC
RB-126: 12-11 ADC
RB-125: 14-11 ADC
RB-126: 12-11 ADC
Output Voltage
RB-125: 28 VDC
RB-126: 28 VDC
RB-125: 28 VDC
RB-126: 28 VDC
Output Current
RB-125: 5.0 AMPS
RB-126: 6.0 AMPS
RB-125: 5.0 AMPS
RB-126: 6.0 AMPS
Efficiency @Full Load
RB-125: 87%
RB-126: 90%
RB-125: 87%
RB-126: 90%
Output Ripple
50 mVp-p plus input ripple.
50 mVp-p plus input ripple.
Regulation
2% for line, 2% load and 2% temperature. Refer to graph of input vs. output voltage.
2% for line, 2% load and 2% temperature. Refer to graph of input vs. output voltage.
Load Transient Response
2V max. overshoot for 40 mSec typ. from FL to NL.
4V max. undershoot for10 mSec. typ.from NL to FL.
2V max. overshoot for 40 mSec typ. from FL to NL.
4V max. undershoot for10 mSec. typ.from NL to FL.
Protection (Overload)
Output voltage collapses to input DC voltage when load exceeds approx. 6.5 to 7.5 amps.
Output voltage collapses to input DC voltage when load exceeds approx. 6.5 to 7.5 amps.
Protection
Overvoltage circuit limits output to approx. 33 VDC.
Overvoltage circuit limits output to approx. 33 VDC.
Temperature
-55°C to +71°C (sufficient cooling required @ +71°C ambient); 25 SCFM of air or base plate temperature held @ 71°C
-55°C to +71°C (sufficient cooling required @ +71°C ambient); 25 SCFM of air or base plate temperature held @ 71°C
Altitude
55,000 ft.
55,000 ft.
Size
2.3" H x 2.3" W x 5.8" L.
5.7 cm H x 5.7 cm W x 14.6 cm L
2.3" H x 2.3" W x 5.8" L.
5.7 cm H x 5.7 cm W x 14.6 cm L
Weight
1.5 lbs. (683 grams).
1.5 lbs. (683 grams).
Compliance
FAA TSO-C71
FAA TSO-C71
External Connections: |
||
| Pin | Description | Remarks |
| A | +13.75 VDC Input | Up to 16 VDC (See specs) |
| B | Common Ground | Input/Output Return |
| C | +28 VDC Output | Regulated, Factory set |
| D | NC | No Connection |
| E | Connected to PIN A | Parallel to input line |
| Model | Receptacle | Mating Connector |
| RB-125 | MS3102A14S-5P | MS3106A14S-5S |
| RB-126 | MS3102A14S-5P | MS3106A14S-5S |
