This post sponsored by Texas Instruments.
The UCC28070 is an advanced power factor correction device.
It integrates two pulse-width modulators (PWMs) that operate 180° out of phase. This interleaved PWM operation, if you will, produces a significant reduction in the input and output ripple currents. As a result, the conducted-EMI filtering becomes simpler and less expensive.
A heavily improved, highly linear multiplier design provides a shared current reference to two independent current amplifiers. This is able to ensure matched average current mode control in both PWM outputs while maintaining a stable, low-distortion sinusoidal input line current.
TI's UCC28070 contains multiple innovations such as quantized voltage feed-forward and advanced current synthesis to promote performance enhancements in THD, efficiency, transient, and PF response. Additional features, including external clock synchronization, amplifier output slew-rate enhancement, and dithering, also expand potential performance enhancements.
UCC28070 has a myriad of protection features. These include under-voltage lockout, output over-voltage detection, open-loop protection, and programmable peak-current limit. Frequency is programmable from 30 to 300 kHz. Maximum duty-cycle clamp is also programmable, as is the frequency dithering magnitude and rate to reduce EMI.
The UCC28070 is available in a 20-lead TSSOP/SOIC package.
By: Rachel Kalina
For more information about this product, click here.
For detailed information about the tool mentioned above, click here.
To request a sample, click here.
To download a datasheet, click here.
To buy now at Mouser, click here.
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