The MAX15012/MAX15013 high-frequency, 175V half-bridge, n-channel MOSFET drivers drive high- and low-side MOSFETs in high-voltage applications. These drivers are independently controlled and their 35ns typ-ical propagation delay, from input to output, are matched to within 2ns (typ). The high-voltage operation. Oct 29, 2015 - 8.0 to 52 V. Bridge A out 1 HS FET gate. Bridge A out 2 LS FET gate.
The NCP5111 is a High Voltage Power gate Driver providing two outputs for direct drive of 2 N-channel power MOSFETs or IGBTs arranged in a half-bridge configuration. It uses the bootstrap technique to insure a proper drive of the High-side power switch. Features.
High Voltage Range: Up to 600V. dV/dt Immunity ±50 V/ns. Gate Drive Supply Range from 10 V to 20 V. High and Low Drive Outputs.
Output Source / Sink Current Capability 250 mA / 500 mA. 3.3 V and 5 V Input Logic Compatible.
Up to Vcc Swing on Input Pins. Matched Propagation Delays Between Both Channels. One Input with Internal Fixed Dead Time (650 ns). Under Vcc LockOut (UVLO) for Both Channels.
Pin to Pin Compatible with Industry Standards Applications. Half Bridge Power Converters.
The ISL784x4 Family Half-Bridge Drivers consist of ISL78424, ISL78444 and ISL78434 devices. The units are suitable for 12V-24V bidirectional DC/DC converters and high current buck or boost applications. The devices feature a 3A sourcing and 4A sinking output current and tri-level PWM input. The drivers are offered with on-chip 3Ω bootstrap FET switch, adaptive dead time control and programmable dead time delay with single resistor. They can be operated in -40°C to +140°C temperature range with supply voltage from 8V to 18V. Original Press Release: Renesas 100V Half-Bridge Drivers Safely Drive MOSFETs for Bidirectional Controller in 12V-48V Automotive Hybrid Powertrains Advanced ISL784x4 MOSFET Driver Family Enables High Current DC/DC Conversion with Adjustable Dead Time and Maximum Efficiency TOKYO, Japan, November 7, 2018 – Renesas Electronics Corporation (TSE:6723), a premier supplier of advanced semiconductor solutions, today announced a new family of automotive-grade 100V, 4A half-bridge N-channel MOSFET drivers. The ISL784x4 family features three devices: the ISL78424 and ISL78444 with single tri-level PWM input for controlling both gate drivers, and the ISL78434, which has dual independent inputs that separately control the high-side and low-side drivers.
The ISL784x4 half-bridge N-MOSFET drivers complement the ISL78224 4-phase bidirectional controller, enabling it to provide up to 3kW of power and greater than 95 percent efficiency in 12V-48V converters used in mild hybrid vehicles. The ISL784x4 drivers are also well suited for 12V-24V bidirectional DC/DC converters, as well as other high current buck or boost applications. The ISL784x4 drivers simplify driving high-current MOSFETs by offering independent sourcing and sinking MOSFET gate drive pins. This makes it easy for designers to use external gate resistors to tune the slew rate of the rising and falling DC/DC switch node transitions, thereby reducing electromagnetic interference (EMI). The ISL784x4 also provide adaptive dead-time control to ensure accurate break-before-make switching operations that prevent shoot-through current that would occur if both DC/DC converter switches were allowed to close simultaneously.
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Additionally, the ISL78424 and ISL78434’s adaptive dead time function is able to sense at the gate of the MOSFETs, eliminating potential errors introduced by voltage drops across the external gate resistors controlling the switching node slew rate. The ISL784x4 drivers are a great fit in high current DC/DC applications like the 12-48V converter for 48V mild hybrids. They improve efficiency by delivering robust gate drive with 3A peak sourcing current and 4A peak sinking current.
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Strong gate drive allows them to rapidly switch high current MOSFETs with large gate capacitance, which reduces switching losses. The half-bridge MOSFET drivers’ adaptive dead time control minimizes excess dead time to reduce conduction losses and further increase DC/DC conversion efficiency. In addition, the ISL784x4 drivers offer voltage ratings that are ideal for 48V automotive systems with the switching node tolerating 70V DC and up to 86V for infrequent transients.
Similarly, the high-side driver’s bootstrap node can tolerate 86V DC and up to 100V during transients. “Our new ISL784x4 half-bridge driver family is the first to combine gate-sensed adaptive dead time control with independent source/sink pins for slew-rate control,” said Akira Omichi, Vice President, Automotive System Project Management Division, Renesas Electronics Corporation.