Nexperia NXF6505A-Q100

Description

The NXF6505A/B-Q100 is a specialized push-pull transformer driver that is designed to deliver low noise and low EMI 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 V DC power supply, while achieving ultra-low noise and EMI through the use of slew rate control and Spread Spectrum Clocking (SSC).The NXF6505A/B-Q100 comprises an oscillator and a gate drive circuit that produces complementary output signals to drive ground-referenced N-channel power switches. To ensure start-up under heavy loads, the device includes two 1.2 A Power-MOSFET switches. Additionally, the switching clock can be provided externally for precise placement of switcher harmonics or when operating with multiple transformer drivers.The NXF6505A/B-Q100 also features internal protection features such as current limiting, under-voltage 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 capacitors.The NXF6505A-Q100 includes a 170 kHz internal oscillator for applications that need to minimize emissions, while the NXF6505B-Q100 has a 440 kHz internal oscillator for applications that require higher efficiency and smaller transformer. 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.

Features

Automotive product qualification in accordance with AEC-Q100 (Grade 1)

Specified from -55 °C to +125 °C

Push-pull driver for transformersWide input voltage range: 2.25 V to 5.5 VHigh output drive: 1.2 A at 5 V supplyLow RON 0.2 Ω maximum at 5 V supplyOptimized for low EMISpread Spectrum Clocking (SSC)Internal switching frequency:for NXF6505A-Q100: 170 kHz )for NXF6505B-Q100: 440 kHz )Synchronization of multiple devices with external clock inputSlew-rate control1.7 A current limitEnable pin to put device in low shutdown current: <1 μAThermal shutdownSmall 6 pin SOT8061-1 packageSoft-start to reduce In-rush currentESD protection:

HBM: ANSI/ESDA/JEDEC JS-001 class 3A exceeds 6000 V

CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1500 V

Typical applications

• Distributed supplies
• Battery management system
• On-board charger
• Low-noise isolated USB supplies
• Medical instruments
• DC-DC converter
• Process control
• Telecom supplies
• Isolated power supplies for automotive (Q100)
• Precision instruments
• Low-noise filament supplies
• Traction inverter and motor control
• Isolated power supply for CAN, RS-485, RS-422, RS-232, SPI, I²C, low-power LAN
• Radio supplies

More information

• IC product information