UCC28C43DR

UCC28C43DR is a Texas Instruments current-mode PWM controller in an SOIC-8 package, for offline flyback and DC-DC conversion. It runs to a 1 MHz maximum switching frequency with a 50 µA start-up current, a ±1 A peak totem-pole output stage, 8.4 V / 7.6 V undervoltage lockout and up to 100% duty cycle, over −40 to +125 °C. Selection advice: the 8.4 V UVLO turn-on is the DC-DC-oriented threshold in the UCC28C4x family — the UCC28C42 variant's higher threshold serves offline bias rails, so the two are not interchangeable in a self-starting design; the DR code is the SOIC-8 large tape-and-reel packing, while the DGK (VSSOP) variant of this device is obsolete and should not be quoted against it. TI lists this code as Active (Production). Parameters verified against Texas Instruments documentation.