125 Watt
Quarter Brick Regulated, 2:1 Input
High efficiency with no minimum load
With a single output up to 35A, our 125 watt quarter brick DC-DC converter is UL- and CE-approved and features an adjustable output voltage, no minimum load and a compact quarter brick package of 2.28" x 1.45" x 0.50".

INPUT
- Input Voltages
- 48 Vdc: 36 - 72 Vdc
- Input Filter: L-C Type
- Start Up Time: Nominal Vin and Constant Resistive Load
- Power Up: 25 mS Typ
- Remote ON/OFF: 25mS Typ
- Negative Logic
- DC-DC ON: Short or OV<Vr<1.2V
- DC-DC OFF: Open or 3.5V<Vr<15V
- Positive Logic
- DC-DC ON: Open or 3.5V<Vr<15V
- DC-DC OFF: Short or OV<Vr<1.2V
- Negative Logic
OUTPUT
- Voltage Accuracy (FL and Nominal Vin): ±1.5%
- Voltage Adjustability: +10%, -20%
- Line Regulation
- LL to HL at FL: ±0.2%
- Load Regulation
- NL to FL:
- 1.8 Vdc: 5.4 mV, ±0.1%
- 2.5 Vdc: 7.5 mV, ±0.1%
- 3.3 Vdc: 10 mV, ±0.2%
- 5 Vdc: 15 mV, ±0.2%
- NL to FL:
- Ripple and Noise (20 MHz BW)
- Measured with a 1uF M/C & a 1OuFT/C: 100 mVp-p
- Temperature Coefficient at FL: ±0.02%/°C, max
- Transient Response, 25% load step change: 200µS
GENERAL
- Efficiency: 84 - 90%
- Isolation Voltage: 1600 Vdc, min.
- Isolation Resistance: 107 Ohms, min.
- Switching Frequency: 270 KHz, typ.
PROTECTIONS
- Over Voltage Protection: 120% Vout max.
- Over current protection threshold: 110 - 140% of load
- Short circuit protection: hiccup, automatic recovery
ENVIRONMENTAL
- Operating Base Plate Temperature Range: -40 to 100°C
- Storage Temperature Range: -55 to 125°C
- Humidity, Max, Non-Condensing: 95%
PHYSICAL
- Case Material: Aluminum base-plate
- Weight: 42 g (1.46 oz.)
- Dimensions: 2.28" x 1.45" x 0.50" Package (57.9 X 36.83 X 12.7 mm)
EMC CHARACTERISTICS
- Conducted Emissions:
- EN55022, Level A
- EN55022, Level B
- Radiated Emissions: EN55022, Level A
- ESD: EN61000-4-2, Perf. Criteria 2
- Radiated Immunity: EN61000-4-3, Perf. Criteria 2
- Fast Transient: EN61000-4-4, Perf. Criteria 2
- Surge: EN61000-4-5, Perf. Criteria 2
- Conducted Immunity: EN61000-4-6, Perf. Criteria 2
Input Voltage Nominal (Range) (Vdc) |
Output Voltage (Vdc) |
Output Current (mA) |
Efficiency % |
Model Number | Case |
---|---|---|---|---|---|
48 (36-72) | 1.8 | 35000 | 84 | OFQ125-48S1.8 | O |
2.5 | 35000 | 86 | OFQ125-48S2.5 | O | |
3.3 | 30000 | 88 | OFQ125-48S3.3 | O | |
5 | 25000 | 90 | OFQ125-48S5.0 | O |