具有可編程最大占空比 10V/8V UVLO 的汽車類雙路交錯式 2MHz PWM 控制器
| Topology | Flyback, Forward |
| Duty cycle (Max) (%) | 90 |
| Vin (Max) (V) | 14.5 |
| UVLO thresholds on/off (V) | 10.5/8.4 |
| Features | Adjustable Switching Frequency, Current Limiting, Input Line Monitor, Multi-topology, Programmable Max Duty Cycle, Programmable Slope Compensation, Soft Start |
| Operating temperature range (C) | -40 to 125 |
| Switching frequency (Max) (kHz) | 2000 |
| Rating | Automotive |
| Gate drive (Typ) (A) | 0.01 |
- Qualified for Automotive Applications
- 2-MHz High-Frequency Oscillator With 1-MHz Operation Per Channel
- Matched Internal Slope Compensation Circuits
- Programmable Maximum Duty Cycle Clamp 60% to 90% Per Channel
- Peak Current Mode Control With Cycle-by-Cycle Current Limit
- Current Sense Discharge Transistor for Improved Noise Immunity
- Accurate Line Undervoltage and Overvoltage Sense With Programmable Hysteresis
- Opto-Coupler Interface
- Operates From 12-V Supply
- Programmable Soft-Start
- APPLICATIONS
- High Output Current (50 A to 100 A) Converters
- Maximum Power Density Designs
- High-Efficiency 48-V Input with Low-Output Ripple Converters
- High-Power Offline, Telecom, and Datacom Power Supplies
PowerPAD is a trademark of Texas Instruments.
The UCC28220 is a BiCMOSinterleaved dual-channel PWM controller. 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. It has 8-V turn-off threshold.
Additional features include a programmable internal slope compensation with a special circuit that ensures exactly the same slope is added to each channel. The UCC28220 is available in a 16-pin low-profile TSSOP package.
