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Single 9-A Peak High Speed Low-Side Power MOSFET Drivers (Rev. D)
Texas Instruments

Description
The UCC37321/2 family of high-speed drivers deliver 9 A of peak drive current in an industry standard pinout. These drivers can drive the largest of MOSFETs for systems requiring extreme Miller current due to high dV/dt transitions. This eliminates additional external circuits and can replace multiple components to reduce space, design complexity and assembly cost. Two standard logic options are offered, inverting (UCC37321) and noninverting (UCC37322). Using a design that inherently minimizes shoot-through current, the outputs of these can provide high gate drive current where it is most needed at the Miller plateau region during the MOSFET switching transition. A unique hybrid output stage paralleling bipolar and MOSFET transistors (TrueDrive) allows efficient current delivery at low supply voltages. With this drive architecture, UCC37321/2/3 can be used in industry standard 6-A, 9-A and many 12-A driver applications. Latch up and ESD protection circuitries are also included. Finally, the UCC37321/2 provides an enable (ENBL) function to have better control of the operation of the driver applications. ENBL is implemented on pin 3 which was previously left unused in the industry standard pin-out. It is internally pulled up to Vdd for active high logic and can be left open for standard operation. In addition to SOIC-8 (D) and PDIP-8 (P) package offerings, the UCC37321/2 also comes in the thermally enhanced but tiny 8-pin MSOP PowerPAD? (DGN) package. The PowerPAD? package drastically lowers the thermal resistance to extend the temperature operation range and improve the long-term reliability.
Features
Industry-Standard Pin-Out Addition of Enable Funtion High-Peak Current Drive Capability of 9 A at the Miller Plateau Region Using TrueDrive Efficient Constant Current Sourcing Using a Unique BiPolar & CMOS Output Stage TTL/CMOS Compatible Inputs Independent of Supply Voltage 20-ns Typical Rise and Fall Times with 10-nF Load Typical Propagation Delay Times of 25 ns With Input Falling and 35 ns with Input Rising 4-V to 15-V Supply Voltage Available in Thermally Enhanced MSOP PowerPAD? Package With 4.7C/W jc Rated From ?40C to 105C Pb-Free Finish (NiPdAU) on SOIC-8 and PDIP-8 Packages APPLICATIONS Switch Mode Power Supplies DC/DC Converters Motor Controllers Class-D Switching Amplifiers Line Drivers Pulse Transformer Driver PowerPAD is trademarks of Texas Instruments Incorporated.

Related Datasheets
Part Number Description Category
? ?TPS28226 High-Frequency 4-A Synchronous MOSFET Driver ICs, Interface
? ?UCC27321 Single 9-A Peak High Speed Low-Side Power MOSFET Drivers (Rev. D) ICs, Interface
? ?UCC37322 Single 9-A Peak High Speed Low-Side Power MOSFET Drivers (Rev. D) ICs, Interface



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