R-78HB3.3-0.5
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The R-78HBxx-Series high efficiency, high input voltage switching regulators are ideally suited to replace 78xx linear regulators and are pin compatible. The efficiency of up to 96% means that very little energy is wasted as heat so there is no need for any heat sinks with their additional space and mounting costs.
An input voltage range of up to 8:1 is unsurpassed by any other converter and allows the full stored energy utilization of standard and high voltage batteries. The fully protected output is ideal for industrial applications (especially for industry standard 24VDC bus supplies) and the L-Version with 90° pins allows direct replacement for laid-flat regulators where component height is at a premium. Low ripple and noise figures and a short circuit input current of typically only 15mA round off the specifications of this versatile converter series. Typical applications include telecommunication, automotive, industrial, aerospace and battery powered applications.
| Attributes | R-78HB3.3-0.5 |
|---|---|
| AC/DC or DC/DC | DC/DC |
| Power (W) | 1.65 |
| Isolation | Non-Isolated |
| Vin (V) | 9.0 - 72.0 |
| Main Vout (V) | 3.3 |
| Nr. of Outputs | Single |
| Iout 1 (mA) | 500.0 |
| Mounting Type | THT |
| Package Style | SIP3 |
| Length (mm) | 11.5 |
| Width (mm) | 8.5 |
| Height (mm) | 17.5 |
| Certifications | EN 55032, EN 60950-1, IEC 60950-1 |
| MIN Operating Temp (°C) | -40.0 |
| MAX Operating Temp (°C) | 71.0 |
| Current (A) | 0.5 |
| Protections | SCP |
| Directives | REACH, RoHS 2+ (10/10) |
| Packaging Type | Tube |
| Warranty | 3 Years |
| Regulation | Regulated |
서류
| 표제 | Type | 날짜 |
|---|---|---|
| recom-certificate-rohs-2.1.pdf | ||
| R-78HB-0.5.pdf | Datasheet | |
| R-78HB-0.5.step | 2D/3D | 2019. 7. 22 |
For switching regulators, but the output capacitor may discharge back into the output of the converter if the input supply is suddenly removed and damage the converter. Fitting protection diodes can avoid this reverse current flow.
A combination of tantalum or electrolytic in parallel with an MLCC on the input or output combines the advantages of both types (high ESR to reduce ringing, low ESR to filter noise).
Even if the converter itself costs more, the savings that can be made in the primary power supply (because it needs less output current), assembly (because there is no fiddly heatsink, screw, nut and thermal paste to worry about) and inventory (one part rather than 7 parts with the linear regulator + heatsink + mounting + input and output capacitors) mean that the overall power supply cost can be lower with the R-78 than with the ""cheaper"" linear regulator.