Datasheet Texas Instruments LM34925
| Manufacturer | Texas Instruments |
| Series | LM34925 |
7.5-100V Wide Vin, 100mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters
Datasheets
LM34925 Integrated Secondary-Side Bias Regulator for Isolated DC-DC Converters datasheet
PDF, 1.3 Mb, Revision: F, File published: Nov 11, 2014
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Prices
Status
| LM34925MR/NOPB | LM34925MRX/NOPB | LM34925SD/NOPB | LM34925SDX/NOPB | |
|---|---|---|---|---|
| Lifecycle Status | Active (Recommended for new designs) | Active (Recommended for new designs) | Active (Recommended for new designs) | Active (Recommended for new designs) |
| Manufacture's Sample Availability | Yes | No | Yes | No |
Packaging
| LM34925MR/NOPB | LM34925MRX/NOPB | LM34925SD/NOPB | LM34925SDX/NOPB | |
|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 |
| Pin | 8 | 8 | 8 | 8 |
| Package Type | DDA | DDA | NGU | NGU |
| Industry STD Term | HSOIC | HSOIC | WSON | WSON |
| JEDEC Code | R-PDSO-G | R-PDSO-G | S-PDSO-N | S-PDSO-N |
| Package QTY | 95 | 2500 | 1000 | 4500 |
| Carrier | TUBE | LARGE T&R | SMALL T&R | LARGE T&R |
| Device Marking | S000YB | S000YB | L34925 | L34925 |
| Width (mm) | 3.9 | 3.9 | 4 | 4 |
| Length (mm) | 4.89 | 4.89 | 4 | 4 |
| Thickness (mm) | 1.48 | 1.48 | .8 | .8 |
| Pitch (mm) | 1.27 | 1.27 | .8 | .8 |
| Max Height (mm) | 1.7 | 1.7 | .8 | .8 |
| Mechanical Data | Download | Download | Download | Download |
Parametrics
| Parameters / Models | LM34925MR/NOPB | LM34925MRX/NOPB | LM34925SD/NOPB | LM34925SDX/NOPB |
|---|---|---|---|---|
| Iout, A | 0.1 | 0.1 | 0.1 | 0.1 |
| Package Group | SO PowerPAD | SO PowerPAD | WSON | WSON |
| Package Size: mm2:W x L, PKG | 8SO PowerPAD: 29 mm2: 6 x 4.9(SO PowerPAD) | 8SO PowerPAD: 29 mm2: 6 x 4.9(SO PowerPAD) | See datasheet (WSON) | See datasheet (WSON) |
| Rating | Catalog | Catalog | Catalog | Catalog |
| Soft Start | None | None | None | None |
| Special Features | Adjustable UVLO,Enable | Adjustable UVLO,Enable | Adjustable UVLO,Enable | Adjustable UVLO,Enable |
| Switching Frequency(Max), kHz | 1000 | 1000 | 1000 | 1000 |
| Switching Frequency(Min), kHz | 150 | 150 | 150 | 150 |
| Topology | Buck,Flybuck | Buck,Flybuck | Buck,Flybuck | Buck,Flybuck |
| Type | Converter (Integrated Switch) | Converter (Integrated Switch) | Converter (Integrated Switch) | Converter (Integrated Switch) |
| Vin(Max), V | 100 | 100 | 100 | 100 |
| Vin(Min), V | 9 | 9 | 9 | 9 |
| Vout(Max), V | 90 | 90 | 90 | 90 |
| Vout(Min), V | 1.25 | 1.25 | 1.25 | 1.25 |
Eco Plan
| LM34925MR/NOPB | LM34925MRX/NOPB | LM34925SD/NOPB | LM34925SDX/NOPB | |
|---|---|---|---|---|
| RoHS | Compliant | Compliant | Compliant | Compliant |
Application Notes
- LM34925 Isolated Evaluation Board (Rev. A)PDF, 516 Kb, Revision: A, File published: Apr 23, 2013
An isolated bias supply is implemented in this evaluation board with LM34925 Constant-On-Timeregulator. The LM34925 regulator integrates both the high and low side power switches essential forcreating isolated buck converter.The following include the board specifications:Input Range: 20V to 100VPrimary Output Voltage: 10VSecondary (Isolated) Output Voltage: - Fly-Buck(TM) converter provides EMC and isolation in PLC applicationsPDF, 201 Kb, File published: Jan 29, 2015
- AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C)PDF, 870 Kb, Revision: C, File published: Dec 17, 2014
In many applications, one or more low-cost, simple to use, isolated power supplies working from input voltages up to 100 V are needed. Traditional solutions use flyback converters to generate this bias supply. Flyback designs typically utilize asymmetric transformers turns ratios for primary and secondary power windings, with an optocoupler and reference, or an auxiliary winding for feedback regul
Model Line
Series: LM34925 (4)
Manufacturer's Classification
- Semiconductors> Power Management> Offline and Isolated DC/DC Controllers and Converters> Isolated DC/DC Converter
