NXP's NXF6501-Q100 and NXF6505A-Q100 / NXF6505B-Q100 push-pull transformer driver ICs for small form factor isolated power supplies offer low noise and low EMI. These features are achieved through slew rate control and spread spectrum clocking (SSC). The extremely low radiated emissions comply with CISPR25 Class-5 and CISPR32 Class-B.
The drivers are qualified to the Automotive Electronics Council (AEC) Q100 standard (Class 1) and are suitable for automotive applications. The drivers operate with an input voltage range of 2.25 V to 5.5 V and deliver output currents of up to 1.2 A at 5 V supply voltage. The temperature range is -55 °C to 125 °C. To ensure that the drivers operate within safe limits, they have internal protective functions such as current limiting, undervoltage lockout, thermal shutdown and interruption circuit. The soft start function prevents high inrush currents in the event of large load capacities. The internal oscillator of the NXF6501-Q100 (5-pin housing SOT8098-1) operates at 440 kHz, thus ensuring high efficiency and the smallest possible transformers. The NXF6505x-Q100 in the 6-pin SOT8061-1 housing have an external clock input and an enable input. The oscillator of the NXF6505A-Q100 operates at 170 kHz, so that the emission values are reduced to a minimum, while the NXF6505B-Q100 operates at 410 kHz for high efficiency and the smallest possible transformers.
Block diagram of the NXF6501-Q100
Block diagram of the NXF6505A/B-Q100 with Clk input
