JAJS131H July 2000 – November 2022 UCC28C40 , UCC28C41 , UCC28C42 , UCC28C43 , UCC28C44 , UCC28C45 , UCC38C40 , UCC38C41 , UCC38C42 , UCC38C43 , UCC38C44 , UCC38C45
PRODUCTION DATA
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The UCCx8C4x controllers are peak current mode pulse width modulators. These controllers have an onboard amplifier and can be used in isolated and nonisolated power supply designs. The onboard totem pole gate driver is capable of delivering 1 A of peak current. This high-speed PWM is capable of operating at switching frequencies up to 1 MHz. . Figure 9-1 shows a typical off-line application using UCC38C44.
Figure 9-2 shows a forward converter with synchronous rectification. This application provides 48 V to 3.3 V at 10 A with over 85% efficiency, and uses the UCC38C42as the secondary-side controller and UCC3961 as the primary-side startup control device.