Gate Drivers: NCP51563 and NCP51752

onsemi’s gate drivers empower hydrogen electrolyzer systems with high-efficiency, low-loss switching and robust isolation. Their support for SiC / Si / IGBT devices enables scalable, modular designs, while features like active Miller clamps, UVLO, and high CMTI ensure safe, precise control under demanding grid conditions. These capabilities make them essential for maximizing performance and reliability in green hydrogen production.

NCP51563: The NCP51563 are isolated dual-channel gate drivers with 4.5-A/9-A source and sink peak current respectively. They are designed for fast switching to drive power MOSFETs, and SiC MOSFET power switches. The NCP51563 offers short and matched propagation delays. Two independent and 5 kVRMS (UL1577 rating) galvanically isolated gate driver channels can be used in any possible configurations of two low side, two high-side switches or a half-bridge driver with programmable dead time. An enable pin shutdown both outputs simultaneously when is set low. The NCP51563 offers other important protection functions such as independent under-voltage lockout for both gate drivers and enable function.  

NCP51752: The NCP51752 is a family of isolated single-channel gate driver with 4.5-A/9-A source and sink peak current respectively. They are designed for fast switching to drive power MOSFETs and SiC MOSFET power switches. The NCP51752 offers short and matched propagation delays. For improved reliability, dV/dt immunity and even faster turn−off, the NCP51752 has an innovative embedded negative bias rail mechanism. The NCP51752 offers other important protection function such as independent under-voltage lockout for both-side driver. Its Vcc UVLO threshold is referenced to GND2 for true UVLO regardless of VEE level. The NCP51752 is available in a 4 mm SOIC-8 package and can support isolation voltage up to 3.75 kVRMS.

Features 

       NCP51563: 

• -- SOIC-16 less pins 12 & 13 with 3.3 mm spacing between channels
• 4.5-A Peak Source, 9-A Peak Sink Output Current Capability
• Output Supply Voltage from 6.5 V to 30 V with 5-V, 8-V, and 17-V UVLO threshold.
• Propagation Delay Typical 36 ns with 8 ns Max Delay Matching per channel
• User Programmable Input Logic for Single or Dual-input modes via ANB
• Common Mode Transient Immunity CMTI > 200 V/ns
• 5 kVrms Galvanic Isolation from input to each output & 1850 V peak differential voltage between output channels
• Enable or Disable pin
• User Programmable Dead-Time

       NCP51752:

• 4.5-A Peak Source, 9-A Peak Sink Output Current
• Integrated Negative Bias Control -2/-3/-4/-5-V
• 36 ns Propagation Delay with 5 ns Max Delay Matching
• 3-V to 20-V Input Supply Voltage
• 200V/ns dV/dt Immunity
• 3.75 kVRMS Isolation for 1 Minute (per UL1577 Requirements)
• UVLO options 6-V and 8-V for MOSFET, 12-V and 17-V for SiC        

Application

       NCP51563:

• Isolated Converters in DC-DC and AC-DC Power Supply
• Server & Telecom Power supply
• Industrial Drives

       NCP51752:

• SiC Power Supply
• Telecom Infrastructure
• Industrial Infrastructure