NXF6505-Q100
Low-noise, 1.2 A transformer driver for isolated power supplies
The NXF6505A/B-Q100 is a specialized push-pull transformer driver that is designed for isolated power supplies in small form factors. This driver is capable of driving low-profile, center-tapped transformers from a 2.25 V to 5.5 V DC power supply, while achieving ultra-low noise and EMI using slew rate control and Spread Spectrum Clocking (SSC).
The NXF6505A/B-Q100 features internal protection features such as current limiting, undervoltage lockout, thermal shutdown, and break-before-make circuitry, ensuring the device operates within safe limits. The device also includes a soft-start feature that prevents high inrush current during power-up with large load.
The NXF6505A/B-Q100 is constructed using an oscillator and a gate drive circuit that produces complementary output signals to drive ground-referenced N-channel power switches. These two complementary 1.2 A Power-MOSFET switches can be used to provide >6 W power. The 440 kHz internal oscillator is for applications that require higher efficiency and smaller transformers. The NXF6505A/B-Q100 is available in a small 6 pin SOT8061-1 package and is characterized for operation within a temperature range of -55 °C to 125 °C.
This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.
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Features and benefits
Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Specified from -55 °C to +125 °C
Push-pull driver for transformers, optimized for low EMI:
- Slew-rate control output
- Spread Spectrum Clocking (SSC)
- Wide input voltage range: 2.25 V to 5.5 V
- High output drive: 1.2 A at 5 V supply
- Low RON 0.2 Ω maximum at 5 V supply
- Internal switching frequency:
- for NXF6505A-Q100: 160 kHz
- for NXF6505B-Q100: 440 kHz
- Synchronization of multiple devices with external clock input
- 2.2 A current limit at 5 V
- Enable pin to put device in low shutdown current: <1 μA
- Thermal shutdown protection
- Soft-start start-up
- Small 6 pin SOT8061-1 (SC-74; TSOP-6) package
ESD protection:
HBM: ANSI/ESDA/JEDEC JS-001 class 3A exceeds 6000 V
CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1500 V
Applications
- Isolated power supply for automotive and industrial applications including:
- CAN, RS-485, RS-422, RS-232, SPI, I²C, low-power LAN
- Low-noise isolated USB supplies
- Process control
- Telecom supplies
- Radio supplies
- Distributed supplies
- Medical instruments
- Precision instruments
- Low-noise filament supplies
- Motor control
- Isolated power supplies for automotive (AEC-Q100)
- Traction inverter
- DC-DC converter
- Battery management system
- On-board charger
Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| NXF6505ADA-Q100 | NXF6505ADA-Q100Z (935691938342) |
Active | N5A |
TSOT23-6 (SOT8061-1) |
SOT8061-1 |
REFLOW_BG-BD-1
|
SOT8061-1_342 |
| NXF6505BDA-Q100 | NXF6505BDA-Q100Z (935691940342) |
Active | N5B |
TSOT23-6 (SOT8061-1) |
SOT8061-1 |
REFLOW_BG-BD-1
|
SOT8061-1_342 |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| NXF6505ADA-Q100 | NXF6505ADA-Q100Z | NXF6505ADA-Q100 |
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|
| NXF6505BDA-Q100 | NXF6505BDA-Q100Z | NXF6505BDA-Q100 |
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Documentation (10)
| File name | Title | Type | Date |
|---|---|---|---|
| NXF6505_Q100 | Low-noise, 1.2 A transformer driver for isolated power supplies | Data sheet | 2024-09-17 |
| AN90063 | Questions about package outline drawings | Application note | 2025-06-13 |
| NXF6505_IBIS_Model | NXF6505 IBIS model | IBIS model | 2024-04-25 |
| SOT8061-1 | Plastic, surface-mounted package (TSOT23-6); 6 leads | Package information | 2024-09-18 |
| REFLOW_BG-BD-1 | Reflow soldering profile | Reflow soldering | 2021-04-06 |
| NXF6505A_SpiceModel | NXF6505A Spice model | SPICE model | 2024-04-25 |
| NXF6505B_SpiceModel | NXF6505B Spice model | SPICE model | 2024-04-25 |
| TN90008 | Reduce radiated emissions in isolated power designs using NXF650x-Q100 | Technical note | 2024-09-16 |
| TN90009 | Protection features of NXF5650x transformer drivers | Technical note | 2024-10-01 |
| UM90033 | NXF6501-Q100 Low noise, 1.2 A transformer driver for isolated power supplies evaluation board | User manual | 2024-07-02 |
Support
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Models
| File name | Title | Type | Date |
|---|---|---|---|
| NXF6505_IBIS_Model | NXF6505 IBIS model | IBIS model | 2024-04-25 |
| NXF6505A_SpiceModel | NXF6505A Spice model | SPICE model | 2024-04-25 |
| NXF6505B_SpiceModel | NXF6505B Spice model | SPICE model | 2024-04-25 |
Ordering, pricing & availability
Sample
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