GaN FET drivers enable 50MHz DC-DC converters
The LMG1020 and LMG1210 can deliver switching frequencies of 50 MHz while improving efficiency and enabling five times smaller sizes previously not possible with silicon MOSFETs.
With a minimum pulse width of 1ns, the LMG1020 60-MHz low-side GaN driver enables high-accuracy lasers in industrial LIDAR applications. The small wafer-level chip-scale (WCSP) package of only 0.8 mm by 1.2 mm helps minimize gate-loop parasitics and losses, further boosting efficiency.
The LMG1210 is a 50-MHz half-bridge driver designed for GaN FETs up to 200V. The device’s adjustable dead time control feature is designed to improve efficiency by as much as 5 percent in high-speed DC-DC converters, motor drives, Class-D audio amplifiers as well as other power-conversion applications. Designers can achieve high system-noise immunity with the high common-mode transient immunity (CMTI) of more than 300 V/ns.
The propagation delay of 2.5ns for the LMG1020 and 10ns for the LMG1210 enables power systems that are 50 times faster than with silicon drivers. The LMG1020 is also capable of delivering high-power 1ns laser pulses for long-range LIDAR applications. The LMG1210 offers a low switch-node capacitance of 1 pF and user-adjustable dead time control to improve efficiency by as much as 5 percent.
The integrated dead time control in the LMG1210 allows for reduced component count and higher efficiency, enabling designers to reduce power-supply size by as much as 80 percent. The increased power density of the LMG1020 enables the highest resolution in LIDAR in the industry’s smallest package
Designers can quickly and easily evaluate these new devices with the LMG1020EVM-006 and LMG1210EVM-012 evaluation modules and SPICE models. Engineers can jump-start their GaN designs using the Nanosecond Laser Driver Reference Design for LIDAR and the Multi-megahertz GaN Power Stage Reference Design for High-Speed DC-DC Converters (above). With over 10 million hours of GaN process reliability testing, TI is addressing the need for proven and ready-to-use solutions through reliable GaN products.
Prototype samples of the LMG1020 and LMG1210 are now available in the TI store and through distribution. The LMG1020 comes in a WCSP package and is priced at US$1.79 in 1,000-unit quantities, while the LMG1210 comes in a quad flat no-lead (QFN) package and is priced at US$2.19 in 1,000-unit quantities.
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