Transformer drivers improve efficiency and performance
:Nexperia has introduced three AEC-Q100 qualified, push-pull transformer drivers that enable the design of small, low-noise, and low-EMI isolated power supplies for a range of automotive applications like traction inverters and motor control, DC-DC converters, battery management systems and on-board chargers in electric vehicles (EV).
The drivers ( XF6501-Q100, NXF6505A-Q100, and NXF6505B-Q100) are also suitable for use in industrial applications like telecommunications, medical applications, instrumentation and industrial automation equipment, solar inverters, energy meters, and programmable logic controllers (PLC).
The NXF650x(A/B)-Q100 series can drive low-profile, centre-tapped transformers from a 2.25 V to 5.5 V power supply with high output current (1.2 A at 5 V) and high efficiency (up to 90 percent).
To enable small form factor designs, the devices have a 440 kHz (NXF6501 and NXF6505B) or 160 kHz (NXF6505A) internal oscillator and a gate drive circuit that produces complementary output signals to drive internal ground-referenced n-channel power switches.
Alternatively, a clock signal can be applied externally to the NXF6505A and NXF6505B to enable precise control of switching harmonics or enable synchronisation of multiple NFX6505x(A/B) -Q100 devices. Additionally, the NXF650x(A/B)-Q100 series employs slew rate control and spread-spectrum clocking (SSC) to deliver ultra-low noise and electromagnetic interference (EMI).
The NXF650x(A/B)-Q100 series also includes a range of internal protection features such as over-current protection (1.7 A) with hiccup mode, under-voltage lockout, thermal shutdown, and break-before-make circuitry to ensure safe operation. Additionally, these transformer drivers have a soft-start (~5 ms) feature that prevents high inrush currents during power-up with large load capacitors. Lastly, these devices have fail-safe inputs that prevent back-powering of the local power supply and eliminate the need for power sequence management.
These devices are available in compact industry-standard footprints like the 5-pin SOT8098 (TSOT5) and 6-pin SOT8061 (TSOT6) package and safely operate in ambient temperatures ranging between -55 °C and 125 °C.
