onsemi NCP51530BMNTWG

For popular topologies like LLC, half bridge converters, full bridge converters, two switch forward converter etc. low−side high−side drivers are needed which perform the function of both buffer and level shifter. These devices can drive the gate of the topside MOSFETs whose source node is a dynamically changing node. The bias for the high side driver in these devices is usually provided through a bootstrap circuit. In a bid to make modern power supplies more compact and efficient, power supply designers are increasingly opting for high frequency operations. High frequency operation causes higher losses in the drivers, hence reducing the efficiency of the power supply. NCP51530 is a 700 V high side−low side driver for AC−DC power supplies and inverters. NCP51530 offers best in class propagation delay, low quiescent current and low switching current at high frequencies of operation. This device thus enables highly efficient power supplies operating at high frequencies. NCP51530 is offered in two versions, NCP51530A/B. NCP51530A has a typical 60 ns propagation delay, while NCP51530B has propagation delay of 25 ns. NCP51530 comes in SOIC8 and DFN10 packages. SOIC8 package of the device is pin to pin compatible with industry standard solutions. NCP51530 has two independent input pins HIN and LIN allowing it to be used in a variety of applications. This device also includes features wherein, in case of floating input, the logic is still defined. Driver inputs are compatible with both CMOS and TTL logic hence it provides easy interface with analog and digital controllers. NCP51530 has under voltage lock out feature for both high and low side drivers which ensures operation at correct VCC and VB voltage levels. The output stage of NCP51530 has 3.5 A/3 A current source/sink capability which can effectively charge and discharge a 1 nF load in 15 ns.

• High voltage range: Up to 700 V
• NCP51530A: Typical 60 ns Propagation Delay
• NCP51530B: Typical 25 ns Propagation Delay
• Low Quiescent and Operating Currents
• 15 ns Max Rise and Fall Time
• 3.5 A Source / 3 A Sink Currents
• Under−voltage Lockout for Both Channels
• 3.3 V and 5 V Input Logic Compatible
• High dv/dt Immunity up to 50 V/ns
• Pin to Pin Compatible with Industry Standard Half−bridge ICs
• Matched Propagation Delay (7 ns Max)
• High Negative Transient Immunity on Bridge Pin
• DFN10 Package Offers Both Improved Creepage and Exposed Pad

• High−density SMPS for Servers, Telecom and Industrial
• Half/Full−bridge & LLC Converters
• Active Clamp Flyback/Forward Converters
• Solar Inverters & Motor Controls
• Electric Power Steering