UCC35701
- 700kHz Operation
- Integrated Oscillator/Voltage Feed Forward Compensation
- Accurate Duty Cycle Limit
- Accurate Volt-second Clamp
- Optocoupler Interface
- Fault Counting Shutdown
- Fault Latch off or Automatic Shutdown
- Soft Stop Optimized for Synchronous Rectification
- 1A Peak Gate Drive Output
- 130µA Start-up Current
- 750µA Operating Current
The UCC35701/UCC35702 family of pulse width modulators is intended for isolated switching power supplies using primary side control. They can be used for both off-line applications and DC/DC converter designs such as in a distributed power system architecture or as a telecom power source.
The devices feature low startup current, allowing for efficient off-line starting, yet have sufficient output drive to switch power MOSFETs in excess of 500kHz.
Voltage feed forward compensation is operational over a 5:1 input range and provides fast and accurate response to input voltage changes over a 4:1 range. An accurate volt-second clamp and maximum duty cycle limit are also featured.
Fault protection is provided by pulse by pulse current limiting as well as the ability to latch off after a programmable number of repetitive faults has occurred.
Two UVLO options are offered. UCC35701 family has turn-on and turn-off thresholds of 13V/9V and UCC35702 family has thresholds of 9.6V/8.8V.
The UCC35701/2 and the UCC25701/2 are offered in the 14 pin SOIC (D), 14 pin PDIP (N) or in 14 pin TSSOP (PW) packages. The UCC15701/2 is offered in the 14 pin CDIP (J) package.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | Advanced Voltage Mode Pulse Width Modulator datasheet (Rev. C) | 2005年 6月 17日 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| More literature | Seminar 300 Topic 8 - Switching Power Supply Design Review | 2001年 2月 15日 | ||
| More literature | Seminar 400 Topic 2 - Design of Flyback Transformers and Filter Inductors | 2001年 2月 15日 | ||
| Application note | DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode | 1999年 9月 5日 | ||
| Application note | U-150 Applying the UCC3570 Voltage-Mode PWM Controller to Both Off-Line | 1999年 9月 5日 |
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