- 制造厂商:TI
- 产品类别:电源管理
- 技术类目:交流/直流和隔离式直流/直流开关稳压器 - PWM 控制器
- 功能描述:温度范围为 0°C 至 70°C 的初级侧启动控制器
- 点击这里打开及下载UCC3960的技术文档资料
- TI代理渠道,提供当日发货、严格的质量标准,满足您的目标价格
The UCC3960 primary-side startup controller is a unique solution that provides all the primary-side functions required for a single-ended, isolated offline, switch-mode power converter that uses secondary-side PWM control. It is usable with a wide range of secondary circuits and is especially well suitable for systems where sophisticated handling of overload conditions is required.
Secondary-side control assumes that output voltage and current measurements are interfaced directly to an output ground-referenced PWM stage that develops the power switch command for the supply. This digital PWM command can then be transmitted to the primary-side power switch through a simple and low-cost isolating pulse transformer. With secondary-side control, it is much easier to monitor and control the system load with tightly coupled analog control loops. Load-oriented features such as output current sharing and synchronous rectification are implemented more easily.
The UCC3960 provides all the circuitry required on the primary side of a secondary-side controlled power supply. It features a free running 60-kHz to 360-kHz oscillator that is synchronizable to the secondary-side PWM signal and also has the ability to accept start/stop PWM commands from the isolating pulse edge transformer. The use of an extremely small and low-cost pulse transformer allows for higher converter bandwidth. This also eliminates the loop-gain variations due to initial accuracy and aging of an opto-coupler feedback element or the size penalty of a gate transformer. It also includes an undervoltage lockout circuit with 2-V hysteresis, a low current startup with active low during UVLO, a soft-start capability, a 5-V reference and a high current power output.
In a non-typical use, the UCC3960 can accommodate an analog feedback signal through an opto-isolator where it can operate in voltage-mode control mode with primary-side peak current limiting.
The UCC3960 and the UCC2960 are available in the 8-pin SOIC (D) and PDIP (P) packages. A 14-pin package version is available as UCC2961 and UCC3961 that includes additional protection features such as multimode overcurrent protection, volt-second clamp, programmable overvoltage and undervoltage sense lines, and the self-bias regulator.
- Operates With Secondary-Side PWM Control
- Receives Isolated PWM Command Through a Pulse-Edge-Transformer
- Initial Free-Running Soft-Start Up with Duty-Cycle Clamping
- Up to 400-kHz Synchronizable Switching Frequency
- High-Current FET Drive (1.5-A Sink, 0.75-A Source)
- Overcurrent Protection
- Undervoltage Lockout with 2-V Hysteresis
- Low-Current Startup typical operating circuit
- Topology
- Flyback, Boost,
- Duty cycle (Max) (%)
- 72
- Supply voltage (Max) (V)
- 19
- UVLO thresholds on/off (V)
- 10.0/8.0
- Operating temperature range (C)
- 0 to 70
- Rating
- Catalog
- Frequency (Max) (kHz)
- 400
- Gate drive (Typ) (A)
- 1.5
UCC3960的完整型号有:UCC3960D,以下是这些产品的关键参数及官网采购报价:
UCC3960D,工作温度:0 to 70,封装:SOIC (D)-8,包装数量MPQ:75个,MSL 等级/回流焊峰值温度:Level-2-260C-1 YEAR,引脚镀层/焊球材料:NIPDAU,TI官网UCC3960D的批量USD价格:1.294(1000+)
UCC3960D,工作温度:0 to 70,封装:SOIC (D)-8,包装数量MPQ:75个,MSL 等级/回流焊峰值温度:Level-2-260C-1 YEAR,引脚镀层/焊球材料:NIPDAU,TI官网UCC3960D的批量USD价格:1.294(1000+)