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Overview
| Topology | Push-Pull Converter symmetrical isolated |
| Input voltage | 3.3 V |
| Switching frequency | 138-203 kHz |
| Output 1 | 5 V / 0.1 A |
| IC revision | F |
Description
The SN6505 is a low-noise, low-EMI push-pulltransformer driver, specifically designed for smallform factor, isolated power supplies. It drives low profile,center-tapped transformers from a 2.25 V to5 V DC power supply. Ultra-low noise and EMI areachieved by slew rate control of the output switchvoltage and through Spread Spectrum Clocking(SSC). The SN6505 consists of an oscillator followedby a gate drive circuit that provides the complementary output signals to drive ground referenced N-channel power switches. The device includes two 1-A Power-MOSFET switches to ensure start-up under heavy loads. The switching clock can also be provided externally for accurate placement of switcher harmonics, or when operating with multiple transformer drivers. The internal protection features include a 1.7A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuitry. SN6505 includes a soft-start feature that prevents high inrush current during power up with large load capacitors. The SN6505 is available in a small 6-pin SOT23/DBV package. The device operation is characterized for a temperature range from –55°C to 125°C.
Features
1- Push-Pull Driver for transformers
- Wide Input Voltage Range: 2.25 V to 5.5 V
- High Output Drive: 1 A at 5 V Supply
- Low RON 0.25 Ω Max at 4.5 V Supply
- Ultra-Low EMI
- Spread Spectrum Clocking
- Precision Internal Oscillator Options: 160 kHz(SN6505A) and 420 kHz (SN6505B)
- Synchronization of Multiple Devices with ExternalClock Input
- Slew-Rate Control
- 1.7 A Current-Limit
- Low Shutdown Current: <1 μA
- Thermal Shutdown
- Wide Temperature Range: –55°C to 125°C
- Small 6-Pin SOT23/DBV Package
- Soft Start to reduce In-rush current
Typical applications
- Low-Noise Isolated USB Supplies, Telecom Supplies, Radio Supplies, Distributed Supplies, Low-Noise Filament Supplies
- Isolated Power Supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, Low-Power LAN
- Medical Instruments, Precision Instruments
More information
Products
| Order Code | Datasheet | Downloads | Status | Product series | VIN | VOut1 (V (DC)) | IOut1 (A) | Type of Insulation | fswitch (kHz) | ∫Udt (Vµs) | NPRI : NSEC | L (µH) | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 760390013 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 3.3 V (DC) | 5 | 0.5 | Functional | 250 - 550 | 11 | 1:1.7 | 475 | 2500 | 6.73 | 10.2 | 4.19 | SMT | |
| 760390015 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 3.3 V (DC) | 5 | 0.45 | Functional | 250 - 550 | 11 | 1:2 | 475 | 2500 | 6.73 | 10.2 | 4.19 | SMT | |
| 760390011 | SPEC | 4 files | Active i| Production is active. Expected lifetime: >10 years. | Transformer | 3.3 V (DC) | 3.3 | 0.1 | Functional | 250 - 550 | 7 | – | 1000 | 1500 | 6.73 | 10.2 | 4.19 | SMT | |
 | 750313769 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 3.3 V (DC) | 5 | 0.6 | Reinforced | 250 - 550 | 10 | 1:1.7 | 340 | 5000 | 9.14 | 12.7 | 7.62 | SMT | |
| 750313626 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 3.3 V (DC) | 5 | 0.5 | Reinforced | 250 - 550 | 10 | 1:2 | 340 | 5000 | 9.14 | 12.7 | 7.62 | SMT | |
 | 750316028 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 3.3 V (DC) | 3.3 | 0.8 | Functional | 400 - 700 | 13 | 1:1.75 | 86 | 2500 | 8.3 | 12.6 | 4.1 | SMT | |
| 750316029 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 3.3 V (DC) | 5 | 0.6 | Functional | 400 - 700 | 8.9 | 1:2.1 | 72 | 2500 | 8.3 | 12.6 | 4.1 | SMT | |
 | 750316031 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 3.3 V (DC) | 3.3 | 0.9 | Reinforced | 150 - 700 | 40 | 1:1.75 | 370 | 5000 | 12.32 | 15.41 | 11.89 | SMT | |
| 750316032 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 3.3 V (DC) | 5 | 0.9 | Reinforced | 150 - 700 | 40 | 1:2 | 370 | 5000 | 12.32 | 15.41 | 11.89 | SMT | |
| 750315371 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 4.5 - 5.5 V (DC) | 5 | 1 | Functional | 400 - 700 | 8.6 | 1:1.1 | 72 | 2500 | 8.3 | 12.6 | 4.1 | SMT | |
| 750316030 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 4.5 - 5.5 V (DC) | 3.3 | 1.2 | Functional | 400 - 700 | 10.2 | 1.3:1 | 94 | 2500 | 8.3 | 12.6 | 4.1 | SMT | |
| 750316033 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 4.5 - 5 V (DC) | 3.3 | 1 | Reinforced | 150 - 800 | 40 | 1.3:1 | 370 | 5000 | 12.32 | 15.41 | 11.89 | SMT | |
| 760390012 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 5 V (DC) | 5 | 0.75 | Functional | 300 - 620 | 11 | 1:1.1 | 475 | 2500 | 6.73 | 10.2 | 4.19 | SMT | |
| 760390014 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 5 V (DC) | 5 | 0.6 | Functional | 300 - 620 | 11 | 1:1.3 | 475 | 2500 | 6.73 | 10.2 | 4.19 | SMT | |
| 750313734 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 5 V (DC) | 5 | 0.8 | Reinforced | 300 - 620 | 10 | 1:1.1 | 340 | 5000 | 9.14 | 12.7 | 7.62 | SMT | |
| 750313638 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 5 V (DC) | 5 | 0.65 | Reinforced | 300 - 620 | 10 | 1:1.3 | 340 | 5000 | 9.14 | 12.7 | 7.62 | SMT | |
| 750313710 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 5 V (DC) | 3.3 | 0.65 | Functional | 250 - 620 | 11 | 1.23:1 | 475 | 2500 | 6.73 | 10.2 | 4.19 | SMT | |
| 750315240 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 5 V (DC) | 5 | 1 | Reinforced | 150 - 700 | 46 | 1:1.1 | 440 | 5000 | 12.32 | 15.41 | 11.89 | SMT |
| Order Code | Datasheet | |
|---|---|---|
| 760390013 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. |
| 760390015 | SPEC |
| 760390011 | SPEC |
| 750313769 | SPEC |
| 750313626 | SPEC |
| 750316028 | SPEC |
| 750316029 | SPEC |
| 750316031 | SPEC |
| 750316032 | SPEC |
| 750315371 | SPEC |
| 750316030 | SPEC |
| 750316033 | SPEC |
| 760390012 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. |
| 760390014 | SPEC |
| 750313734 | SPEC |
| 750313638 | SPEC |
| 750313710 | SPEC |
| 750315240 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Downloads | Status | Product series | VIN | VOut1 (V (DC)) | IOut1 (A) | Type of Insulation | fswitch (kHz) | ∫Udt (Vµs) | NPRI : NSEC | L (µH) | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Samples |
|---|
