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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, a modification of the component will be implemented soon. Please find the PCN 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, a modification of the component will be implemented soon. Please find the PCN 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, a modification of the component will be implemented soon. Please find the PCN 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, a modification of the component will be implemented soon. Please find the PCN 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 |
|---|
