20 Watt
Single Output 1" x 2" x 0.40" Package
Isolated, Wide Input, 2:1
Highly efficient with low profile package
With a minimum input/output isolation of 1500 Vdc, our 20 watt single output DC-DC converter with epoxy encapsulation features a low profile package of 1.0" x 2.0" x 0.4" and an operating temperature range up to 85°C. UL and CE-approved, this design is 89% efficient and has six-sided continuous metal shielding.
INPUT
- Input Voltages
- 24 Vdc: 18 - 36 Vdc
- 48 Vdc: 36 - 72 Vdc
- Input Filter: L-C type
- Input reflected ripple: Nominal Vin and full load 20 mA p-p
- Start up time Nominal Vin and constant resistor load: 10 mS, typ.
- Remote on/off
- DC-DC ON: Open or 3.5V<Vr<12V
- DC-DC OFF: Short or 0V<Vr<1.2V
- Remote OFF Input current: Nominal Vin 20 mA
OUTPUT
- Voltage Accuracy: ±1% max.
- Line Regulation LL to HL at FL: ±0.2% max.
- Load Regulation 10% to 100% FL: ±0.5% max.
- Ripple and Noise (20 MHz BW): 75 mV p-p max.
- Temperature Coefficient (at FL): ±0.02%/°C max.
- Transient Response, recovery time 25% load step: 300μms max.
GENERAL
- Efficiency: 79 - 89%
- Isolation Voltage: 1500 Vdc min.
- Isolation Resistance: 109 Ohms, min./1000 MOhms
- Isolation Capacitance: 1000 pF, max.
- Switching Frequency: 500 KHz, typ.
- Over Voltage Protection (Zener diode clamp)
- 1.5V output: 3.9V
- 1.8V output: 3.9V
- 2.5V output: 3.9V
- 3.3V output: 3.9V
- 5V output: 6.2V
- 12V output: 15V
- 15V output: 18V
- Short Circuit Protection: Hiccup, automatics recovery Over Load Protection: Percent of FL at nominal input 150% typ.
PHYSICAL
- Case Material: Nickel coated copper with non-conductive base
- Weight: 1.5 oz. (42.52 g)
- Dimensions: 1.00" x 2.00" x 0.40" (25.4 x 50.8 x 10.16 mm)
- MTBF: 1.791 x 106 Hours
ENVIRONMENTAL
- Operating Temperature Range: -40 to 85°C with derating * Maximum Case Temperature: 100°C
- Storage Temperature Range: -55 to 105°C
- Thermal Impedance: Nature convection 12°C/Watt, nature convection with heat sink 10°C/Watt
- Thermal Shock: MIL-STD-810D
- Vibration: 10 - 55 Hz, 2G, 30 minutes along X, Y and Z
- Relative humidity: 5 - 95% RH
- Cooling: Free Air Convection
EMC CHARACTERISTICS
- Conducted emissions: EN55022, Level A
- 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 Range (Vdc) |
Output Voltage (Vdc) |
Output Current (mA) |
Efficiency % |
Model Number | Case | Capacitor Load (Max) |
| 24 (18-36) | 1.5 | 6000 | 79 | LWA20-24S1.5 | P | 65000μF |
| 1.8 | 6000 | 82 | LWA20-24S1.8 | P | 65000μF | |
| 2.5 | 6000 | 84 | LWA20-24S2.5 | P | 33000μF | |
| 3.3 | 5000 | 86 | LWA20-24S33 | P | 13000μF | |
| 5 | 4000 | 88 | LWA20-24S5 | P | 6800μF | |
| 12 | 1670 | 87 | LWA20-24S12 | P | 2200μF | |
| 15 | 1330 | 87 | LWA20-24S15 | P | 755μF | |
| 48 (36-72) | 1.5 | 6000 | 80 | LWA20-48S1.5 | P | 65000μF |
| 1.8 | 6000 | 83 | LWA20-48S1.8 | P | 65000μF | |
| 2.5 | 6000 | 85 | LWA20-48S2.5 | P | 33000μF | |
| 3.3 | 5000 | 87 | LWA20-48S33 | P | 13000μF | |
| 5 | 4000 | 89 | LWA20-48S5 | P | 6800μF | |
| 12 | 1670 | 88 | LWA20-48S12 | P | 2200μF | |
| 15 | 1330 | 87 | LWA20-48S15 | P | 755μF |