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Nexperia launches transformer drivers for EVs

Netherlands-based global semiconductor company Nexperia has introduced push-pull transformer drivers that provide 6 W of power delivery at up to 90% efficiency in a small, SOT package for a range of automotive applications like traction inverters and motor control, DC-DC converters, battery management systems and on-board chargers.

The NXF6501-Q100, NXF6505A-Q100, and NXF6505B-Q100 are AEC-Q100 qualified and enable the design of small, low-noise and low-EMI isolated power supplies.

The NXF650x(A/B)-Q100 series can drive low-profile, center-tapped transformers from a 2.25 V to 5.5 V power supply with high output current (1.2 A at 5 V) and up to 90% efficiency. 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 synchronization of multiple NFX6505x(A/B) -Q100 devices. The NXF650x(A/B)-Q100 series also 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. The transformer drivers have a soft-start (~5 ms) feature that prevents high inrush currents during power-up with large load capacitors. The devices also have fail-safe inputs that prevent back-powering of the local power supply and eliminate the need for power sequence management.

The devices are available in compact industry-standard footprints like the 5-pin SOT8098 (TSOT5) and 6-pin SOT8061 (TSOT6) package and can operate safely in ambient temperatures ranging between -55° C and 125° C.

Source: Nexperia

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