Industry's first 100-V half-bridge gate driver for enhancement-mode GaN power FETs
June 20, 2011 // Paul Buckley
National Semiconductor has introduced what the company claims is the industry’s first 100 V half-bridge gate driver optimized for use with enhancement-mode Gallium-Nitride (GaN) power field-effect transistors (FETs) in high-voltage power converters. National’s LM5113 is a highly-integrated, high-side and low-side GaN FET driver that reduces component count by 75 percent and shrinks printed circuit board (PCB) area by up to 85 percent compared to discrete driver designs.
Designers of power bricks and communications infrastructure equipment require high power efficiency in the smallest form factor. Enhancement-mode GaN FETs enable new levels of efficiency and power density compared to standard metal-oxide semiconductor field-effect transistors (MOSFETs) due to their low on-resistance (Rdson) and gate charge (Qg) as well as their ultra-small footprint, but driving them reliably presents significant new challenges. National’s LM5113 driver IC eliminates these challenges, enabling power designers to realize the benefits of GaN FETs in a variety of popular power topologies.
Meeting the stringent gate drive requirements of enhancement-mode GaN FETs requires multiple discrete devices and significant circuit and PCB design effort. National’s LM5113 fully-integrated enhancement-mode GaN FET driver greatly reduces circuit and PCB design effort and delivers industry-best power density and efficiency.
National’s LM5113 is a 100 V bridge driver for enhancement-mode GaN FETs. Using proprietary technology, the device regulates the high side floating bootstrap capacitor voltage at approximately 5.25 V to optimally drive enhancement-mode GaN power FETs without exceeding the maximum gate-source voltage rating. The LM5113 also features independent sink and source outputs for flexibility of the turn-on strength with respect to the turn-off strength. A low impedance pull down path of 0.5 Ohms provides a fast, reliable turn-off mechanism for the low threshold voltage enhancement-mode GaN power FETs, helping maximize efficiency in high frequency power supply designs. The LM5113 features an integrated high-side bootstrap diode, further minimizing PCB real estate. The LM5113 also provides independent logic inputs for the high-side and low-side drivers, enabling flexibility for use in a variety of both isolated and non-isolated power supply topologies.
National’s LM5113 is offered in a 10-pin 4 mm by 4 mm LLP package and cost $1.65 each in quantities of 1,000. Samples are available now and production quantities will be available in September 2011.
More information the LM5113 half-bridge gate driver about the at
The future of custom ASICs
February 26, 2015
With the prevailing view that Moore's Law is slowing Donnacha O’Riordan, director of services strategy for S3 Group, gives ...
Save me from the overbearing analytics of IoT
5 trends to watch at Mobile World Congress
Infineon: CAN FD success goes at the expense of FlexRay
Who will partner LG to stimulate OLED TV sector?
Printed NFC tags detect opened goods
February 25, 2015
Thin Film Electronics ASA, a long-time pioneer of organic electronics, has announced a near-field communications (NFC) passive ...
Geo selects S3 DAC IP for video processor
Nanoscale defect detection focuses on lowering solar panel costs
Flexible organic circuit makes fever alarm
- Software-Defined Radio Handbook
- A Four-Quadrant DC/DC Switching Regulator Smoothly Transitions from Positive to Negative Output Voltages for FPGA and Other Applications
- LED Driver with Integrated Spread Spectrum Reduces EMI without Adding Flicker
- Accelerate SDN and NFV with Off-the-Shelf Software
InterviewInfineon: CAN FD success goes at the expense of FlexRay
The faster version of the venerable CAN bus, CAN FD is currently taking off at several carmakers. Infineon's Thomas Böhm, Head of Body / Automotive, believes this could well go at the expense of FlexRay. ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
To ensure you have a good start in 2015, Freescale is giving away five of its QorIQ TWR-LS1021A Tower system modules, worth USD269 each, for EETimes Europe's readers to win.
The module is the most feature-rich and high-performance Tower system offered by Freescale, enabling compatibility and interoperability with the growing list of Tower expansion modules, offering an easily accessible...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.