JAJSPV4C February 2023 – March 2024 UCC14341-Q1
PRODUCTION DATA
The UCC14341-Q1 module uses an active full-bridge inverter on the primary-side and a passive full-bridge rectifier on the secondary-side. The small integrated transformer has a relatively high carrier frequency to reduce the size for integrating into the 36-pin SSOP package. The power stage carrier frequency operates within 11MHz to 18MHz. The power stage carrier frequency is determined by input voltage with a feed-forward control: when VVIN is 12V, the frequency is 18MHz; when VVIN is 18V, the frequency is 11MHz; when VVIN is between 12V and 18V, the frequency reduces gradually from 18MHz to 11MHz as VVIN voltage rises. Spread spectrum modulation, SSM, is used to reduce emissions. ZVS operation is maintained to reduce switching power losses.
The UCC14341-Q1 module creates two regulated outputs. It can be configured as a single output converter, VDD to VEE only, or a dual-output converter, VDD to VEE and COM to VEE. Even though the module uses VEE as the reference point to create two positive output voltages, the outputs can use COM as the reference point and become a positive and a negative output.
These two outputs are controlled independently through hysteresis control. Furthermore, the VDD-VEE is the main output, and COM to VEE uses the main output as its input to created a second regulated output voltage.