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Home > Polytron Power Supplies > Polytron LWB20 Series DC-DC Converters, 20 Watt, Single Output, Isolated, 4:1 Wide Input Range, 1.0" x 2.0" x 0.4"
Polytron LWB20 Series DC-DC Converters, 20 Watt, Single Output, Isolated, 4:1 Wide Input Range, 1.0" x 2.0" x 0.4"
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Price (Each): Call or e-mail for quotes or to order.
Available to Order
Item Number: LWB20
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Six-sided metal shielding with epoxy encapsulation
Our 20 watt single output DC-DC converter is UL- and CE-approved and features a low profile package of 1.0" x 2.0" x 0.4" and minimum input/output isolation of 1500 Vdc. This epoxy-encapsulated design also has six-sided continuous metal shielding and an operating temperature range between -40 and 85°C.
LWB20 Series Specification Sheet PDF
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Output Current
(mA) |
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Input Current |
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Daburn Part
Number |
Input Voltage
Range (Vdc) |
Output Voltage
(Vdc) |
Min. Load |
Full Load |
Output Ripple & Noise |
Input Current
No Load
(mA) |
Full Load |
Efficiency
% |
Max. Capacitor
Load µF |
| Single Output |
| LWB20-24S33 |
9-36 |
3.3 |
0 |
5500 |
60mVp-p |
50 |
934 |
85 |
18000μF |
| LWB20-24S5 |
5 |
0 |
4000 |
75mVp-p |
65 |
992 |
88 |
9600μF |
| LWB20-24S12 |
12 |
0 |
1670 |
75mVp-p |
22 |
1018 |
86 |
1650μF |
| LWB20-24S15 |
15 |
0 |
1330 |
75mVp-p |
22 |
1014 |
86 |
1050μF |
| LWB20-48S33 |
18-75 |
3.3 |
0 |
5500 |
60mVp-p |
35 |
467 |
85 |
18000μF |
| LWB20-48S5 |
5 |
0 |
4000 |
75mVp-p |
35 |
496 |
88 |
9600μF |
| LWB20-48S12 |
12 |
0 |
1670 |
75mVp-p |
15 |
503 |
87 |
1650μF |
| LWB20-48S15 |
15 |
0 |
1330 |
75mVp-p |
15 |
501 |
87 |
1050μF |
| Dual Output |
| LWB20-24-5 |
9 – 36 |
±5 |
0 |
±2000 |
100mVp-p |
55 |
992 |
88 |
±4800μF |
| LWB20-24-12 |
±12 |
0 |
±833 |
100mVp-p |
30 |
1004 |
87 |
±825μF |
| LWB20-24-15 |
±15 |
0 |
±667 |
100mVp-p |
30 |
1005 |
87 |
±525μF |
| LWB20-48-5 |
18 – 75 |
±5 |
0 |
±2000 |
100mVp-p |
35 |
490 |
89 |
±4800μF |
| LWB20-48-12 |
±12 |
0 |
±833 |
100mVp-p |
17 |
496 |
88 |
±825μF |
| LWB20-48-15 |
±15 |
0 |
±667 |
100mVp-p |
17 |
496 |
89 |
±525μF |
Input and Output Specifications:
INPUT
- Input voltage range
- 24V nominal input: 9 - 36 Vdc
- 48V nominal input: 18 - 75 Vdc
- Input filter: Pi type
- Input surge voltage
- 24V input: 50 Vdc, 100 mS max
- 48V input: 100 Vdc
- Input reflected ripple current
- Nominal Vin and full load: 20mAp-p
- Start up time
- Nominal Vin and Power up: 20Ms typ.
- Constant resistive load: Remote ON/OFF 20mS, typ.
- Start-up voltage
- 24V input: 9 Vdc  * 48V input: 18 Vdc
- Shutdown Voltage
- 24V input: 7.5 Vdc
- 48V input: 15 Vdc
- Remote ON/OFF
- Positive logic (Standard)
- DC-DC ON: Open or 3V<Vr<12V
- DC-DC OFF: Short or OV<Vr<1.2V
- Negative logic (Option)
- DC-DC ON: Short or 0V<Vr<1.2V
- DC-DC OFF: Open or 3V<Vr<12V
- Input current of remote control pin
- Nominal Vin: -0.5 mA - 0.5 mA
- Remote off state input current
OUTPUT
- Output power: 20 Watts, max.
- Voltage accuracy
- Full load and nominal Vin: ±1%
- Minimum load: 0%
- Voltage adjustability
- Line regulation
- LL to HL at Full Load Single: ±0.2%
- Dual: ±0.5%
- Load regulation
- No Load to Full Load Single: ±0.5%
- Dual: ±1%
- Cross regulation (Dual)
- Asymmetrical load 25%/100% FL: ±5%
- Ripple and noise (20 MHz bandwidth): 60 - 100 mVp-p (Measured with a 0.1μF/50V MLCC)
- Temperature coefficient: ±0.02%/°C, max
- Transient response recovery time
- 25% load step change: 250μS
- 3.3V output: 3.9Vdc
- Over voltage protection
- Zener diode clamp
- 12V output: 15 Vdc
- 15V output: 18 Vdc
- Over load protection
- Percent of FL at nominal input: 150% typ.
- Short circuit protection: Hiccup, automatic recovery
More Specifications:
GENERAL
- Efficiency: 85 - 88%
- Isolation Voltage
- Input to Output: 1600 Vdc, min
- Input (Output) to Case: 1600 Vdc, min
- Case grounding
- Connect case to –Vin with decoupling y Cap
- Isolation resistance: 109 ohms, min
- Isolation capacitance: 1500 pF, max.
- Switching frequency: 400 KHz. typ.
- Approvals and standard: IEC60950-1, UL60950-1 EN60950-1 * Case material: Nickel-coated copper
- Base material: FR4 PCB
- Potting material: Epoxy (UL94-VO)
- Dimensions: 2.00 x 1.00 x 0.40 inches (50.8 x 25.4 x 10.2 mm)
- Weight: 27 g (0.95 oz)
- MTBF
- BELLCORE-TR-NWT-000332: 1.620 x 10^6 hrs
- MIL-HDBK-217F: 6.590 x 105 hr
ENVIRONMENTAL
- Operating ambient temperature
- -40 to 66°C without derating
- 66 to 105°C with derating
- Maximum case temperature: 105°C
- Storage temperature range: -55 to 125°C
- Thermal impedance
- Nature convection: 12°C/Watt
- Nature convection with heat –sink: 10°C/Watt
- Thermal shock: MIL-STD-810F
- Vibration: MIL-STD-810F
- Relative humidity: 5 - 95% RH
EMC CHARACTERISTICS
- EMI: EN55022, Class A
- ESD: EN61000-4-2
- Air ±8KV
- Contact ±6KV, Perf. Criteria B
- Radiated immunity: EN61000-4-3, 10V/m, Perf. Criteria A * Fast transient: EN61000-4-4, ±2KV, Perf. Criteria B
- Surge: EN61000-4-5, ±1KV, Perf. Criteria A
- Conducted immunity: EN61000-4-6, 10 Vrms, Perf. Criteria A
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