The UCC38050 and UCC38051 are PFC controllers for low-to-medium power applications requiring compliance with IEC 1000-3-2 harmonic reduction standard. The controllers are designed for a boost preregulator operating in transition mode (also referred to as boundary-conduction mode or critical conduction-mode operation). They feature a transconductance voltage amplifier for feedback error processing, a simple multiplier for generating a current command proportional to the input voltage, a current-sense (PWM) comparator, PWM logic, and a totem-pole driver for driving an external FET.
In the transition mode operation, the PWM circuit is self-oscillating, with the turnon being governed by an inductor zero-current detector (ZCD pin), and the turnoff being governed by the current-sense comparator. Additionally, the controller provides features such as peak current limit, default timer, overvoltage protection (OVP) and enable.
| Part number | Order | Device type | Control method | UVLO thresholds on/off (V) | Operating supply (Max) (V) | Operating supply current (mA) | Operating temperature range (C) | Rating | Features | Package Group | Package size: mm2:W x L (PKG) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| UCC38050 |
|
Single-phase PFC | TM | 15.8/9.7 | 18 | 4 | 0 to 70 | Catalog |
OVP
Transition Mode Control |
PDIP | 8
SOIC | 8 |
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
| UCC28050 | Samples not available | Single-phase PFC | TM | 15.8/9.7 | 18 | 4 | -40 to 85 | Catalog |
OVP
Supports Flyback Transition Mode Control |
PDIP | 8
SOIC | 8 |
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
| UCC28051 |
|
Single-phase PFC | TM | 12.5/9.7 | 18 | 4 | -40 to 105 | Catalog |
OVP
Supports Flyback Transition Mode Control |
PDIP | 8
SOIC | 8 |
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
| UCC28056 |
|
Single-phase PFC | TM | 10.65/8.85 | 34 | 2.2 | -40 to 125 | Catalog |
< 150W Applications
Audible noise minimization circuitry Low Power OVP Soft Start Transition Mode Control |
SOT-23 | 6 | 6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6) |
| UCC28064A |
|
Interleaved PFC | TM | 10.35 / 9.6 | 21 | 5 | -40 to 125 | Catalog |
< 150W Applications
> 750W Applications Burst mode for no load regualtion Feed-forward correction for near unity PF Interleaved Low Power Soft Start |
SOIC | 16 | 16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16) |
| UCC28070 |
|
Interleaved PFC | CCM | 10.2/9.2 | 21 | 20 |
-40 to 125
-40 to 85 |
Catalog |
> 750W Applications
Average Current Mode Interleaved OVP Programable switching frequency |
SOIC | 20
TSSOP | 20 |
20SOIC: 132 mm2: 10.3 x 12.8 (SOIC | 20)
20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20) |
| UCC28180 |
|
Single-phase PFC | CCM | 11.4/9.7 | 21 | 7 | -40 to 125 | Catalog |
Audible noise minimization circuitry
Burst mode for no load regualtion No AC line sensing Programable switching frequency |
SOIC | 8 | 8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
| UCC38051 | Samples not available | Single-phase PFC | TM | 12.5/9.7 | 18 | 4 | 0 to 70 | Catalog |
OVP
Transition Mode Control |
SOIC | 8 | 8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
