1.5W Series DC/DC Converters

Certified & Compliant

CE Certified RoHS Compliant CNAS Compliant IAF Compliant

1.5W Series Wide Input Isolated DC-DC Converters

1.5 Watt | Low Noise | High efficiency

Features

  • Wide input voltage range (2:1 and 4:1 options)
  • Ultra-low output noise and ripple
  • Ultra-compact SIP package (22.00 × 9.50 × 12.00 mm)
  • Wide operating temperature range: -40°C to +85°C
  • High efficiency (up to 89%)
  • High I/O isolation voltage (1500 Vdc or 3000 Vdc)
  • No external heatsink required
  • EMC compliant: Bare module meets CISPR22/EN55022 Class B
  • Continuous short-circuit protection
  • 3-year product warranty

Overview

The Delus 1.5W series is a high-performance, micro-power DC-DC converter designed for wide input voltage applications. Housed in an ultra-compact SIP package, its exceptional power density helps engineers maximize valuable PCB real estate. Featuring low inrush current, excellent load regulation, and ultra-low output ripple, this series ensures stable and reliable operation even in highly sensitive circuits.

Utilizing an advanced PFM (Pulse Frequency Modulation) control architecture, the 1.5W wide-input series is optimized for battery-powered equipment and fluctuating input bus voltages. Unlike standard fixed-input DC-DC modules, it effortlessly accommodates wider input voltage fluctuations without the need for additional pre-regulation circuitry, simplifying system design and reducing overall BOM costs.

Built to withstand demanding environments, these converters deliver an ideal power solution for industrial control systems, communication equipment, and precision instrumentation. They are specifically engineered for applications requiring broad input voltage tolerances and robust galvanic isolation between the input and output.

Chat on WhatsApp Download Full Datasheet (PDF)

Key Electrical Specifications

Input Specifications
ItemConditionMin.Typ.Max.Unit
Input Impulse Voltage
(1 sec max)
5 Vin models
12 Vin models
24 Vin models
48 Vin models
-0.7
-0.7
-0.7
-0.7

10
20
40
75
Vdc
Start-up Voltage5 Vin models
12 Vin models
24 Vin models
48 Vin models


4.5
9
18
36
Vdc
Input control (CTRL)Module On
Module Off
Open or High impedance
Highlevel (Sink < 10mA)
Output Specifications
ItemConditionMin.Typ.Max.Unit
Line Regulation100% load, input low to high
±0.05±0.15%
Load Regulation10-100% load, nominal input
±0.1±0.3
Output Voltage Accuracy100% load, nominal input
±1±3
Balance of VoutDual output, balance load

±2
Ripple & NoiseDC-20MHz bandwidth
40100mVp-p
Temperature Drift100% load, nominal input

±0.03%/℃
Short Circuit Protection
Continuous, Self-Recovery
Common Specifications
ItemConditionMin.Typ.Max.Unit
Switching Frequency100% load, input low to high180
550kHz
Operating TemperatureTa > 70℃ derating−40
+85℃
Lead Temperature1.5mm from case for 10 seconds

+300
Storage Temperature
−50
+130
Storage Humidity


95%
Hot Plug
Unavailable
Weight

4.6
g
Case Material
Black Plastic (UL94V-0)
Sub Series Differences
Sub SeriesKey Feature
Input Voltage RangeIsolation VoltagePackage / SizeNo. of Outputs
WA_CS-1W5Standard & Cost-effective2 : 11500 VdcSIP8 / 22.0 × 12.0 × 9.5 mm± Dual
WB_CS-1W5Standard & Cost-effective2 : 11500 VdcSIP8 / 22.0 × 12.0 × 9.5 mmSingle
WE_CS-1W5High isolation2 : 13000 VdcSIP8 / 22.0 × 12.0 × 9.5 mm± Dual
WF_CS-1W5High isolation2 : 13000 VdcSIP8 / 22.0 × 12.0 × 9.5 mmSingle

Selection Guide

Image Model Number Actions
WB_CS-1W5 Image
WB_CS-1W5 Series 1.5 9-18,18-36,36-72 3.3,5,9,12,15,24 1500 22.0 × 12.0 × 9.5 Download Datasheet
WB1212CS-1W5 1.5 9-18 12 1500 22.0 × 12.0 × 9.5
WB1205CS-1W5 1.5 9-18 5 1500 22.0 × 12.0 × 9.5
WB1203CS-1W5 1.5 9-18 3.3 1500 22.0 × 12.0 × 9.5
WB1215CS-1W5 1.5 9-18 15 1500 22.0 × 12.0 × 9.5
WB1224CS-1W5 1.5 9-18 24 1500 22.0 × 12.0 × 9.5
WB1209CS-1W5 1.5 9-18 9 1500 22.0 × 12.0 × 9.5
WB2405CS-1W5 1.5 18-36 5 1500 22.0 × 12.0 × 9.5
WB0515CS-1W5 1.5 4.5-9 15 1500 22.0 × 12.0 × 9.5
WB2412CS-1W5 1.5 18-36 12 1500 22.0 × 12.0 × 9.5
WB4812CS-1W5 1.5 36-72 12 1500 22.0 × 12.0 × 9.5
WB4815CS-1W5 1.5 36-72 15 1500 22.0 × 12.0 × 9.5
PWB2405CS-1W5 1.5 9-36 5 1500 22.0 × 12.0 × 9.5
WB4803CS-1W5 1.5 36-72 3.3 1500 22.0 × 12.0 × 9.5
WB2424CS-1W5 1.5 18-36 24 1500 22.0 × 12.0 × 9.5
WB4824CS-1W5 1.5 36-72 24 1500 22.0 × 12.0 × 9.5
WB2403CS-1W5 1.5 18-36 3.3 1500 22.0 × 12.0 × 9.5
WB4809CS-1W5 1.5 36-72 9 1500 22.0 × 12.0 × 9.5
WB2415CS-1W5 1.5 18-36 15 1500 22.0 × 12.0 × 9.5
WB2409CS-1W5 1.5 18-36 9 1500 22.0 × 12.0 × 9.5
WB4805CS-1W5 1.5 36-72 5 1500 22.0 × 12.0 × 9.5
WE_CS-1W5 Image
WE_CS-1W5 Series 1.5 9-18,18-36,36-72 ±5,±9,±12,±15 3000 22.0 × 12.0 × 9.5 Download Datasheet
WE1209CS-1W5 1.5 9-18 ±9 3000 22.0 × 12.0 × 9.5
WE4815CS-1W5 1.5 36-72 ±15 3000 22.0 × 12.0 × 9.5
WE1212CS-1W5 1.5 9-18 ±12 3000 22.0 × 12.0 × 9.5
WE4812CS-1W5 1.5 36-72 ±12 3000 22.0 × 12.0 × 9.5
WE1205CS-1W5 1.5 9-18 ±5 3000 22.0 × 12.0 × 9.5
WE2415CS-1W5 1.5 18-36 ±15 3000 22.0 × 12.0 × 9.5
WE2405CS-1W5 1.5 18-36 ±5 3000 22.0 × 12.0 × 9.5
WE2409CS-1W5 1.5 18-36 ±9 3000 22.0 × 12.0 × 9.5
WE2412CS-1W5 1.5 18-36 ±12 3000 22.0 × 12.0 × 9.5
WE1215CS-1W5 1.5 9-18 ±15 3000 22.0 × 12.0 × 9.5
WE4809CS-1W5 1.5 36-72 ±9 3000 22.0 × 12.0 × 9.5
WE4805CS-1W5 1.5 36-72 ±5 3000 22.0 × 12.0 × 9.5
WA_CS-1W5 Image
WA_CS-1W5 Series 1.5 9-18,18-36,36-72 ±5,±9,±12,±15 1500 22.0 × 12.0 × 9.5 Download Datasheet
WA1205CS-1W5 1.5 9-18 ±5 1500 22.0 × 12.0 × 9.5
WA1215CS-1W5 1.5 9-18 ±15 1500 22.0 × 12.0 × 9.5
WA4812CS-1W5 1.5 36-72 ±12 1500 22.0 × 12.0 × 9.5
WA2412CS-1W5 1.5 18-36 ±12 1500 22.0 × 12.0 × 9.5
WA1209CS-1W5 1.5 9-18 ±9 1500 22.0 × 12.0 × 9.5
WA2405CS-1W5 1.5 18-36 ±5 1500 22.0 × 12.0 × 9.5
WA1212CS-1W5 1.5 9-18 ±12 1500 22.0 × 12.0 × 9.5
WA4815CS-1W5 1.5 36-72 ±15 1500 22.0 × 12.0 × 9.5
WA2409CS-1W5 1.5 18-36 ±9 1500 22.0 × 12.0 × 9.5
WA2415CS-1W5 1.5 18-36 ±15 1500 22.0 × 12.0 × 9.5
WA4809CS-1W5 1.5 36-72 ±9 1500 22.0 × 12.0 × 9.5
WA4805CS-1W5 1.5 36-72 ±5 1500 22.0 × 12.0 × 9.5
WF_CS-1W5 Image
WF_CS-1W5 Series 1.5 9-18,18-36,36-72 3.3,5,9,12,15,24 3000 22.0 × 12.0 × 9.5 Download Datasheet
WF1212CS-1W5 1.5 9-18 12 3000 22.0 × 12.0 × 9.5
WF4815CS-1W5 1.5 36-72 15 3000 22.0 × 12.0 × 9.5
WF1209CS-1W5 1.5 9-18 9 3000 22.0 × 12.0 × 9.5
WF2409CS-1W5 1.5 18-36 9 3000 22.0 × 12.0 × 9.5
WF1224CS-1W5 1.5 9-18 24 3000 22.0 × 12.0 × 9.5
WF2424CS-1W5 1.5 18-36 24 3000 22.0 × 12.0 × 9.5
WF1215CS-1W5 1.5 9-18 15 3000 22.0 × 12.0 × 9.5
WF2415CS-1W5 1.5 18-36 15 3000 22.0 × 12.0 × 9.5
WF4812CS-1W5 1.5 36-72 12 3000 22.0 × 12.0 × 9.5
WF0515CS-1W5 1.5 4.5-9 15 3000 22.0 × 12.0 × 9.5
WF2405CS-1W5 1.5 18-36 5 3000 22.0 × 12.0 × 9.5
WF2412CS-1W5 1.5 18-36 12 3000 22.0 × 12.0 × 9.5
WF1205CS-1W5 1.5 9-18 5 3000 22.0 × 12.0 × 9.5
WF1203CS-1W5 1.5 9-18 3.3 3000 22.0 × 12.0 × 9.5
PWF2405CS-1W5 1.5 9-36 5 3000 22.0 × 12.0 × 9.5
WF4805CS-1W5 1.5 36-72 5 3000 22.0 × 12.0 × 9.5
WF4824CS-1W5 1.5 36-72 24 3000 22.0 × 12.0 × 9.5
WF4803CS-1W5 1.5 36-72 3.3 3000 22.0 × 12.0 × 9.5
WF4809CS-1W5 1.5 36-72 9 3000 22.0 × 12.0 × 9.5
WF2403CS-1W5 1.5 18-36 3.3 3000 22.0 × 12.0 × 9.5

Resources & Downloads

FAQs

What is a wide voltage power module?

Wide input voltage range, stable output under voltage fluctuation, ideal for industrial, automotive and battery-powered applications.

Difference between wide voltage & normal modules?

Normal modules have narrow input range; wide voltage modules have better adaptability and anti-interference for complex conditions.

How to choose input voltage range?

Select with 10%–20% margin. 9–36V for industrial, 18–75V for automotive.

Can this DC-DC module work without external input/output capacitors?

All electrical parameters of our power modules are tested and guaranteed without the need for external input or output capacitors. However, adding external capacitors will further optimize performance. We highly recommend using them, as this minimal investment yields substantial gains in system stability and reliability.

What derating is required at high ambient temperature?

Please refer to the temperature derating curve in the product datasheet for specific operational guidelines.