The UCC28220 and UCC28221 are a family of BiCMOS interleaved dual channel PWM controllers. Peak current mode control is used to ensure current sharing between the two channels. A precise maximum duty cycle clamp can be set to any value between 60% and 90% duty cycle per channel.
UCC28220 has an UVLO turn-on threshold of 10 V for use in 12-V supplies while UCC28221 has a turn-on threshold of 13 V for systems needing wider UVLO hysteresis. Both have 8-V turn-off thresholds.
Additional features include a programmable internal slope compensation with a special circuit which is used to ensure exactly the same slope is added to each channel and a high voltage 110-V internal JFET for easier startup for the wider hysteresis UCC28221 version.
The UCC28220 is available in both 16-pin SOIC and low-profile TSSOP packages. The UCC28221 also comes in 16-pin SOIC package and a slightly larger 20-pin TSSOP package to allow for high voltage pin spacing to meet UL1950 creepage clearance safety requirements.
|Duty Cycle (Max) (%)|
|Frequency (Max) (kHz)|
|UVLO Thresholds On/Off (V)|
|Regulated Outputs (#)|
|Operating Temperature Range (C)|
|Approx. Price (US$)|
| Flyback |
| HV Start-up |
Input Line Monitor
Programmable Slope Compensation
|-40 to 105|
| 16SOIC |
|1.90 | 1ku|
|Sample & Buy|
|Automotive||UCC28220-Q1||Q100 devices qualified for high-reliability automotive applications targeting zero defects|