Texas Instruments Inc. (TI, Dallas, TX) introduced a family of high-speed drivers that delivers 9A of peak drive current in an industry-standard pin-out. The UCC37321 and UCC37322 can drive the largest MOSFETs in applications that require extreme Miller current, such as switch-mode power supplies, dc/dc converters, motor controllers and class-D switching amplifiers. The drivers effectively eliminate the need for additional external circuits, and replace multiple components to reduce space, design complexity and assembly cost.
Using a design that minimizes shoot-through current, the outputs of the UCC37321 and UCC37322 can provide high gate drive current where it is most needed at the Miller plateau region during the MOSFET switching transition. A hybrid output stage, TrueDrive™ technology, parallels bipolar and MOSFET transistors and allows efficient current delivery at low supply voltages. The UCC37321 and UCC37322 feature 20ns typical rise and fall times with 10nF load, typical propagation delay times of 25ns with input falling and 35ns with input rising, a 4V to 15V supply voltage, and are rated from -40 to +105 degrees C.
The UCC37321/2 family is available now in SOIC-8 (D), PDIP-8 (P) and eight-pin MSOP PowerPAD™ (DGN) packaging. The PowerPAD™ package lowers the thermal resistance to extend the temperature operation range and improve the long-term reliability. Pricing in quantities of 1,000 units is $0.99.
