UCC25800AQDGNRQ1 Ultra-Low EMI Transformer Driver IC Chip for Automotive Applications with 9V to 34V Input

UCC25800 ultra-low EMI transformer driver integrates the switching power stage, control, and protection circuits to simplify isolated bias supply designs. It enables the use of transformers with higher leakage inductance but significantly smaller parasitic primary-to-secondary capacitance. This low-capacitance transformer design reduces common-mode current injection through the bias transformer by an order of magnitude, making it an ideal solution for isolated bias supply in various automotive applications to minimize EMI noise caused by high-speed switching devices. The soft-switching feature further reduces EMI noise.

• High-efficiency half-bridge transformer driver
• Ultra-low EMI with low interwinding capacitance
• Smaller and lower-cost transformer
• Programmable frequency: 0.1 MHz to 1.2 MHz
• Wide input voltage range: 9 V to 34 V
• 9 W from 34-V input, 6 W from 24-V input, 4 W from 15-V input
• Automatic dead-time adjustment with maximum dead-time programming
• External clock synchronization for low noise
• Robust protection features including undervoltage lockout (UVLO), programmable over-current protection (OCP), input overvoltage protection (OVP), and over temperature protection (TSD)
• Integrated soft-start to reduce in-rush current
• External disable function with fault-code output
• AEC-Q100 qualified for automotive applications: Temperature grade 1: -40°C to +125°C

• Automotive traction inverter & motor control
• Automotive on-board charger (OBC)
• Automotive DC/DC converter
• EV charging station, DC fast charging station
• UPS and solar inverters
• Industrial motors, elevators and escalators
• GaN, IGBT and SiC gate transformer driver bias supply